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Ferramentas por profissão

Desenvolvedores, designers, professores, contadores, estudantes... encontre sua caixa de ferramentas.

💻 Ferramentas para desenvolvedores · 42 🎨 Ferramentas de design · 39 📚 Ferramentas para professores · 21 🧾 Ferramentas de contabilidade · 57 🎓 Ferramentas para estudantes · 11 🛒 Ferramentas de e-commerce · 11 🚚 Ferramentas de logística · 9 💪 Ferramentas de fitness · 29 🏗️ Ferramentas de engenharia · 125 💼 Ferramentas profissionais · 54 📱 Ferramentas para criadores · 13 🍼 Ferramentas para pais · 5 📷 Ferramentas de fotografia · 9 🗣️ Ferramentas de idiomas · 15 🎵 Ferramentas para músicos · 10 ⚖️ Ferramentas legais · 5 🎮 Ferramentas gamer · 8

Cor

Ferramentas de conversão de cores, contraste e paletas

Verificador de contraste de corColor contrast checker: calculate contrast per WCAG 2.1 and AA/AAA pass with picker and replacement suggestions for accessible design. Conversor de cor HSL/HSVColor HSL converter: convert between HEX, RGB, HSL and HSV with live preview for frontend and design, one-click copy and offline. Misturador de coresColor mixer: blend two colors by ratio with gradient preview, supports HEX/RGB/HSL conversion and scale generation for palettes. Localizador de nome de corColor name finder: enter HEX to find closest common color names like red and blue among 48 for design and palettes, with one-click copy and offline. Ajustador de tom de corColor shade adjuster: lighten or darken a HEX color by percentage with live preview for design and UI states, one-click copy and offline. Opacidade HEX para RGBAHEX opacity converter: convert HEX color with opacity percentage to RGBA code with live preview for web and design, with one-click copy and offline. Conversor HEX para CMYKHEX to CMYK: enter HEX to get CMYK and RGB with picker and copy for print and design. Supports batch processing and one-click copy, offline use. Conversor HEX para RGB / HSLHEX to RGB converter: enter hex color value to instantly convert to RGB, HSL and RGBA codes with preview for design and frontend, with one-click copy and offline. Gerador de cores acessíveisRandom accessible color: generate random foreground background pairs meeting WCAG contrast with score, lock and bulk for design accessibility, with with one-click. Conversor RGB para HEXRGB to HEX: enters RGB values to get HEX and HSL codes with preview. For design. Supports batch processing, export and one-click copy, offline use. Localizador de cores seguras para webWeb safe colors tool: enter HEX to find nearest web-safe color and browse 216-color palette for legacy display support, with one-click copy and offline.

Codificar e decodificar

Ferramentas de conversão de dados: codificação, decodificação, hash, escape e mais

Codificador/decodificador Base58Base58 codec tool: support Base58 encoding and decoding for Bitcoin address format for development and blockchain, with one-click copy, offline. Codificador / Decodificador Base64Online Base64 encode and decode: supports text, URL and images with full UTF-8 including Chinese. Import files, batch process and one-click copy for dev and data transfer. Codificador / Decodificador HEX e dump hexadecimalHex converter: support text and hex conversion with offset and ASCII hex dump viewer for development and debugging, with one-click copy and offline. Decodificador JWTJWT decoder: decodes JWT header and payload via Base64Url to JSON locally. For auth debugging. Supports batch processing, export and one-click copy, offline use. Gerador de hash SHASHA hash calculator: compute SHA-1, SHA-256 and SHA-512 hashes for file verification and learning, with one-click copy and offline. Codificador / Decodificador URLURL encode decode tool: support URL encoding and decoding with special characters and bulk for development, with one-click copy, offline. Analisador / Gerador de parâmetros URLURL params parser: parse query string to JSON and table handling repeats and encoding or generate back for development, with one-click copy and offline. Ferramenta de cifra de VigenèreVigenere cipher tool: encrypt and decrypt text by key with case preserve for learning and fun, with one-click copy, offline.

Conversores

Conversores de unidades, bases, codificações e dados

Conversor de áreaArea converter: convert between sqm, mu, hectare and sqft with live table for daily and engineering, with one-click copy, offline and multilingual. Tradutor binárioBinary translator: support text and binary conversion with bulk and format for learning and dev, with one-click copy, offline. Conversor de bytes e armazenamentoByte converter: converts B/KB/MB/GB/TB/PB and KiB/MiB/GiB/TiB with decimal/binary distinction. For developers. Supports batch processing, export and one-click copy. Conversor de tamanhos de roupaClothing size converter: convert CN, US, EU and JP sizes with chest/waist/hip charts for men, women, kids and shoes for cross-border shopping. Conversor de culináriaCooking converter: convert volume, weight and temperature among cups, oz, g, ml, °C/°F with ingredient densities for baking and recipes. Conversor de moedasCurrency converter: 30 currencies with cached rates for offline use (USD,EUR,CNY,JPY). For travel and trade. Supports batch processing and one-click copy. Conversor de taxa de dadosData rate converter: convert between Mbps, MB/s, Gbps and more speed units with download time reference for networking, one-click copy and offline. Conversor de decibéisDecibel converter: convert dB, dBm, dBV and power/voltage ratios with reference impedance and SPL for audio and RF engineering. Conversor de unidades de energiaEnergy converter: convert between joules, kJ, calories, kcal, Wh and kWh showing all units at once for nutrition and energy, with one-click copy and offline. Conversor de unidades de frequênciaFrequency converter: convert between Hz, kHz, MHz, GHz and wavelength showing all results at once for wireless and communications, with one-click copy and offline. Conversor de tamanho de chapéuHat size converter: convert head circumference among US/EU/UK sizes with cm and inches for online hat shopping. Supports batch processing and one-click copy. Conversor de comprimentoLength converter: convert length among meters, feet and inches with common references for engineering and daily use. Supports batch processing and one-click copy. Conversores · 25 ferramentas →

Finanças

Calculadoras de empréstimos, juros e finanças

Desafio de poupança de 100 dias100 day savings challenge: generate plan and total by 1-100 incremental savings with progress visualization for habit and finance, with one-click with one-click. Desafio de poupança de 52 semanasSave progressively each week for a year with a full weekly plan, average and total. Supports batch processing and one-click copy, offline use. Advance Salary CalculatorAdvance salary calculator: enter advance amount, months and monthly rate to get EMI, total repayment and interest for employees and HR, multilingual. Africa Income Tax EstimatorAfrica income tax estimator: enter annual income and rate to estimate tax and take-home for African countries, multilingual. Africa Mobile Money CalculatorAfrica mobile money calculator: enter amount and fee to get fee and net for M-Pesa/Airtel, multilingual. Cronograma de amortização de empréstimoAmortization schedule generator: create monthly payment breakdown and chart from amount, rate and term for mortgage and finance, with one-click copy, offline. Conversor APR/APYConvert between APR and APY with different compounding frequencies. Converts APY and APR with compounding frequency. Supports batch processing and one-click copy. Australia Medicare Levy CalculatorAustralia Medicare Levy Calculator: enter key parameters for quick estimate, built for overseas users. Australia Payg Withholding CalculatorAustralia Payg Withholding Calculator: enter key parameters for quick estimate, built for overseas users. Australia Super CalculatorAustralia super calculator: enter salary to compute 12% Super Guarantee for Australia. Bahrain Vat CalculatorBahrain Vat Calculator: enter key parameters for quick estimate, built for overseas users. Calculadora de divisão de contaBill splitter calculator: get per person share from total and count with tip and tax for dining and AA, with one-click copy, offline. Finanças · 197 ferramentas →

Texto

Ferramentas de texto: contagem, codificação e formatação

Gerador de siglasAcronym generator: convert phrases to acronyms with multi-style and readability score for branding, with one-click copy, offline and multilingual. Adicionar números de linhaAdd line numbers to text with a custom start and separator. Adds line numbers with custom start and separator for code and docs. Cifra AtbashAtbash cipher tool: encrypt and decrypt by reverse alphabet substitution with case preserve for learning and fun, with one-click copy, offline. Tradutor de BrailleBraille translator: convert between English, numbers, pinyin and Unicode braille dots, supports Grade 1, letters, numbers and punctuation for accessibility learning. Gerador de texto circuladoBubble text generator: convert text to circle and bubble effect fonts with multiple styles for social and nicknames, with one-click copy and offline. Contador de frequência de caracteresCharacter frequency counter: count letters and words in real time with sorting for writing, with one-click copy and offline. Extrator de e-mailsEmail extractor: paste text to extract all email addresses with dedup, sorting and CSV export for marketing and data cleaning. Contador e removedor de emojisEmoji counter and remover: count emojis in text with list or remove them for clean copy with count for social and data cleaning, with one-click copy and offline. Gerador de texto eleganteFancy text generator: convert plain text to stylish Unicode fonts with copy and social compatibility check for bios and headings. Localizar e substituirFind and replace: paste text to batch find and replace by keyword with regex, case and whole word for text cleaning and editing. Verificador de densidade de palavras-chaveKeyword density checker: count occurrences, density and frequency per 100 words for keywords with SEO tips, one-click copy, offline and multilingual. Conversor de leetspeakLeetspeak converter: convert between English and leet with multiple strength levels and custom mapping for fun and password ideas. Texto · 37 ferramentas →

Desenvolvedor

Ferramentas para desenvolvedores: JSON, regex, CSV e mais

Tabela ASCIIASCII table tool: lookup char decimal, hex and binary with search and copy for development and learning, with one-click copy, offline. Conversor Base32Base32 converter tool: support Base32 encoding and decoding with padding and bulk for development, with one-click copy, offline. Pré-visualização de imagem Base64Base64 image viewer: paste a Data URL or raw Base64 to preview the image locally with estimated size. Nothing is uploaded. Ideal for frontend debugging. Brazil CPF ValidatorBrazil CPF validator: enter 11-digit CPF to validate for Brazil, multilingual. Brazil PIX Key ValidatorBrazil PIX validator: enter CPF/CNPJ/email/phone/random key to validate PIX format for Brazil. Gerador de gradiente cônicoConic gradient generator: adjust angle, stops and center with live preview and CSS copy, animated for front-end gradien Supports batch processing and one-click copy. Validador de cartão de créditoCredit card validator: validate numbers with Luhn and detect Visa and Mastercard for payments and fraud prevention, with one-click copy and offline. Gerador de expressões cronCron generator: visually pick minute/hour/day/month/week to build Cron, parse and preview next runs for scheduling and DevOps. Validador de endereços criptoCrypto address validator: validate BTC/ETH and multi-chain formats with checksum, chain hints and error tips before transfers. Gerador de easing CSSCSS easing generator: visually adjust cubic-bezier curve to generate transition code with live preview for frontend and animation, with one-click copy and offline. Calculadora de especificidade CSSCSS specificity calculator: enter any selector to get specificity a,b,c with priority and override explanation for frontend debugging, one-click copy and offline. Conversor de unidades CSSCSS units converter: convert px, rem, em, vw/vh and % by base font with responsive preview for front-end layouts. Supports batch processing and one-click copy. Desenvolvedor · 66 ferramentas →

Geradores

Geradores de senhas, UUID e números aleatórios

Gerador de arte ASCIITurn A-Z and 0-9 text into large 5-row ASCII art instantly, with one-click copy. Ideal for nicknames, signatures and posts. Latin letters and digits only. Gerador de nomes de empresasBusiness name generator: generate tech and classic style candidates from keywords with filtering for startups, with one-click copy and offline. Baralho e distribuiçãoCard deck dealer: shuffle and deal from 52 cards without duplicates, custom players and counts. Supports batch export, one-click copy and sharing. Validador e gerador de RG chinêsChina ID card validator: validate 18-digit format rules including region and checksum for development and testing, with one-click copy and offline. Cara ou coroaCoin flip: simulate fair coin toss, multiple flips and stats with custom heads/tails labels and history for draws and probability demos. Rolador de dadosDice roller: roll 1-20 dice with multiple sides automatically summing total for board games, with one-click copy and offline. Gerador de código de barras EAN-13EAN-13 barcode generator: enter 12 digits to calculate check digit and generate printable barcodes for retail and inventory, with one-click copy and offline. Gerador de nomes inglesesEnglish name generator: generate names by gender, style and initial with meaning and pronunciation, with favorites and copy for naming and characters. Gerador de pessoa fictíciaFake person generator: generate complete profiles with name, gender, age, email, phone, city and job for testing and demo data, with one-click copy and offline. Validador e gerador de IMEIIMEI generator and validator: validate and generate 15-digit IMEI codes with Luhn check digit for testing and device management, with one-click copy and offline. Latin Declension GeneratorLatin declension generator: stem plus 1st/2nd/3rd declension for a full singular and plural case table. Gerador de chaves de licençaLicense key generator: create software license keys by pattern with grouping, checksum and batch export for dev testing and licensing. Geradores · 39 ferramentas →

Calculadoras

Calculadoras do dia a dia: porcentagem, IMC e mais

Data e hora

Ferramentas de idade, diferença de datas e carimbo de data/hora

Calculadora de idadeOnline age calculator: enter birthdate to get exact age in years/months/days, total days/hours, next birthday countdown, zodiac with Gregorian/lunar support. Calculadora de diferença de idadeCalculate the difference between two dates in years, months and days. Calculates age gap in years/months/days with leap year support. Despertador onlineOnline alarm clock tool: set time and ringtone with fullscreen and background alert for daily and work reminders, with one-click copy, offline. Relógio binárioBinary clock tool: show real-time binary clock with multi-format and learning mode for study and geek, with one-click copy, offline. Contagem regressiva de aniversárioBirthday countdown tool: get countdown and age from birthday with reminders for wishes and anniversaries, with one-click copy, offline. Cronômetro regressivoCountdown timer: set hours/minutes/seconds with fullscreen, sound alerts and loop for exams, workouts and presentations Supports batch processing and one-click copy. Adicionar ou subtrair diasDate add/subtract tool: add or subtract days, weeks and months from a date handling month-end and leap years for scheduling, with one-click copy and offline. Contagem regressiva de dataDate countdown: pick target date to get remaining days, hours and minutes with holiday and anniversary reminders for planning. Calculadora de diferença entre datasDate difference calculator: count days, weeks, months, business and weekend days between dates with auto order handling, one-click copy and offline. Conversor de formato de dataDate format converter: enter date to convert to ISO, US, EU, RFC and timestamp with bulk for development and data, with one-click copy and offline. Consulta de informações da dataDate info calculator: enter date to get weekday, leap year, day of year and quarter with holiday marks for calendar and work planning. Conversor de serial de data ExcelExcel date converter: convert between Excel serial numbers and dates 1900 system with bulk and formatting for office data, with one-click copy and offline. Data e hora · 28 ferramentas →

Imagem

Ferramentas de processamento de imagens (em planejamento)

Gerador de QR coloridoColorful QR code generator: create QR codes with custom colors and size with logo and error correction for branding and events, one-click copy and offline. Calculadora de proporção de corteImage crop ratio calculator: enter original size and target ratio to get crop dimensions and keep area with preview for social and print, one-click copy and offline. Compressor e redimensionador de imagensImage compressor: customize dimensions and quality to compress JPG, PNG and WebP keeping transparency for design, with one-click copy and offline. Mesclador de imagensImage concatenate: stitch multiple images horizontally or vertically with spacing, background and size for long and comparison images. Estimador de tamanho de imagemImage file size: estimate file size by resolution, bit depth and format with compression reference for upload and storage planning. Inversor de imagensImage flipper: flip images horizontally or vertically with rotation and download for composition and fun edits. Supports batch processing and one-click copy. Conversor de formato de imagemImage format converter: pick an image and target format (PNG/JPG/WebP/GIF/BMP), converted locally in your browser. Quality setting for JPEG/WebP, live preview and download. Redimensionador de imagensImage resizer: resize by percent or width/height with live preview supporting PNG/JPG/WebP locally for design, with one-click copy and offline. Imagem para Base64Image to Base64: pick an image to get its Base64 Data URL locally. Nothing is uploaded. With preview and one-click copy. Divisor de grade do InstagramInstagram grid generator: split image into 3×3 grid with spacing and batch download for social layouts. Supports batch processing and one-click copy. PDF to ImagePDF to image converter: turn each PDF page into PNG, JPG or WebP locally in your browser. Adjust scale, format and page range with live preview and batch download. Conversor de SVG para PNGSVG to PNG tool: batch convert SVG to PNG with size, background and transparency for design and development, with one-click copy, offline.

Rede

Ferramentas de rede: IP, DNS e mais (em planejamento)

Calculadora de plano de dadosData plan calculator: estimate monthly remaining, overage and plan recommendations by daily usage and quota with multi-plan comparison. Gerador e validador de MACMAC address generator: generate valid MAC addresses or validate format supporting colon and hyphen for networking, with one-click copy and offline. Conversor de velocidade de redeNetwork speed converter: convert between Mbps, Gbps, MB/s and GB/s to see broadband download speed for networking and testing, with one-click copy and offline. Consulta de serviço de portaPort lookup tool: enter port number to quickly find common services and protocols like HTTP, SSH, FTP for networking and ops, with one-click copy and offline. Gerador de IPs aleatóriosRandom IP generator: bulk generate random IPv4 or IPv6 addresses excluding private ranges with custom count for network testing, with one-click copy and offline.

Matemática

Ferramentas matemáticas: conversão de bases, números aleatórios e mais

Calculadora do jogo 2424 game: create 4 numbers to make 24 with solutions and hints, multi-difficulty and timer for math and brain training, with one-click copy, offline. Calculadora de série aritméticaCalculate the nth term and sum of an arithmetic series. Calculates sum, nth term and average for arithmetic series. Supports batch processing and one-click copy. Calculadora bináriaBinary calculator: support binary add subtract multiply divide and bitwise with decimal view for learning and dev, with one-click copy, offline. Calculadora de círculoCircle calculator: calculate area, circumference and diameter from radius, diameter or circumference for learning, with one-click copy and offline. Calculadora de números complexosComplex number calculator: add, subtract, multiply and divide complex numbers with magnitude and conjugate, showing a+bi with polar view for math, one-click copy. Calculadora de intervalo de confiançaConfidence interval calculator: calculate interval from sample mean and size at 90/95/99% for statistics, with one-click copy and offline. Calculadora de coeficiente de correlaçãoCorrelation coefficient: enter two datasets to get Pearson and Spearman with significance, scatter plot and regression for analysis. Calculadora de decimal para fraçãoDecimal to fraction converter: convert decimals to simplest fractions and mixed numbers with repeating detection for math, with one-click copy and offline. Calculadora de diluiçãoDilution calculator: calculate stock volume and solvent by C1V1=C2V2 with molarity and percent for lab and reagent preparation. Calculadora de distância entre pontosDistance between points: enter two points to get straight distance, midpoint and slope in 2D and 3D with unit conversion for math and surveying. Calculadora de fatorialFactorial calculator: calculate n! with digit count supporting 0-170 using scientific notation for larger with tips for math, with one-click copy and offline. Calculadora de sequência de FibonacciFibonacci calculator: generate sequence, get Nth term and sum by count with fast matrix and big integers for math and algorithms. Matemática · 53 ferramentas →

Outros

Outras ferramentas úteis

Jogo 2048Play 2048 online: merge number tiles with arrow keys or swipe to reach 2048. Supports keyboard and touch, score and best record, offline play. Gerador de ideias de atividadesGenerate activity ideas for weekends, dates and family. Generates ideas by scene, people and duration with save and sha Supports batch processing and one-click copy. Calculadora de idade nos planetasAge on planets calculator: get age on planets from Earth birthday with next birthday for science and fun, with one-click copy, offline and multilingual. Calculadora de teor alcoólicoCalculate alcohol by volume (ABV) from original and final gravity. Calculates ABV from OG and FG with calories. Supports batch processing and one-click copy. Calculadora de temperatura aparenteCompute heat index or wind chill from temperature and conditions. Calculates wind chill and heat index from temp, humidity and wind. Aquarium Substrate CalculatorAquarium substrate: tank size and depth for sand/gravel/aquasoil kilograms, pounds, 5kg bags and cost. cm/in supported. Calculadora de volume de aquárioAquarium volume calculator: get volume, water and glass thickness from dimensions with unit conversion for fish keeping, with one-click copy, offline. Calculadora de bitola AWGConvert AWG wire gauge to diameter, area and resistance. Calculates diameter, area, resistance and ampacity by AWG. Supports batch processing and one-click copy. Verificação de bateriaBattery info detector: check level, charging status, health and estimated runtime in real time, with discharge estimate and reminders. Works in browsers supporting Battery API. Calculadora de vida útil da bateriaBattery life calculator: get runtime from capacity and consumption with multi-device compare for purchase and use, with one-click copy, offline. Calculadora de álcool no sangueBlood alcohol calculator: estimate BAC from weight, drinks and time with legal standard for safety and health, with one-click copy, offline. Categoria de pressão arterialBlood pressure category tool: get category from systolic and diastolic with advice for health and monitoring, with one-click copy, offline. Outros · 115 ferramentas →

Ferramentas para desenvolvedores

Utilitários de desenvolvimento e depuração para programadores

Ferramentas de design

Ferramentas de cores, layout e imagens para designers

Ferramentas para professores

Ferramentas de ensino, questionários e gestão de sala para professores

Calculadora de presençaAttendance calculator: get attendance rate from required and actual with level and tips for attendance and HR, with one-click copy, offline. Gerador de certificado de prêmioAward generator: customize title, name and award to create certificates with print and download for recognition, with one-click copy, offline. Gerador de cartelas de bingoBingo generator: create bingo cards from word list with print and online play for teaching and events, with one-click copy, offline. Gerador de calendário mensalMonth calendar generator: pick any year and month to generate a calendar with weekdays and holidays, with print and export, one-click copy and offline. Gerador de ditadoDictation generator: enter one "word,meaning" per line for an instant student sheet (words only) plus teacher answer key, generated locally. Copy and print. Simplificador de fraçõesFraction simplifier: enter numerator and denominator to reduce to lowest terms and convert to mixed numbers and decimals for math, one-click copy and offline. Calculadora de porcentagem e notaGrade calculator: enter assignments, midterm and final weights to get current total and required scores with grade bands for students. Gerador de gruposGroup generator: enter list to randomly group by size or count with dedup and balancing for classes and activities. Supports batch processing and one-click copy. Gerador de grade de caligrafia chinesaHanzi grid generator: enter Chinese characters (up to 50) for an instant tianzi-grid practice sheet in 3 sizes, with copyable HTML for printing. Gerador de exercícios de matemáticaMath quiz: generate random arithmetic problems by difficulty with timer and score for student practice and speed. Supports batch processing and one-click copy. Gerador de exercícios de matemáticaMath worksheet generator: create arithmetic worksheets by grade and type with printable sheets and answers for teachers and parents. Prática de cálculo mentalMental math: generate random arithmetic problems with timer and accuracy stats for speed and brain training. Supports batch processing and one-click copy. Ferramentas para professores · 21 ferramentas →

Ferramentas de contabilidade

Ferramentas de impostos, depreciação e faturas para contadores

Australia Fbt CalculatorAustralia Fbt Calculator: enter key parameters for quick estimate, built for overseas users. Bangladesh Income Tax CalculatorBangladesh Income Tax Calculator: enter key parameters for quick estimate, built for overseas users. Calculadora de juros de depósitoBank interest calculator: get simple and compound interest from principal, rate and term with breakdown for savings, with one-click copy, offline. Brazil 13th Salary CalculatorBrazil 13th Salary Calculator: enter key parameters for quick estimate, built for overseas users. Calculadora de ponto de equilíbrioBreak-even calculator: calculate break-even units and revenue from fixed cost and price with chart for pricing, with one-click copy and offline. Chile Impuesto Unico CalculatorChile Impuesto Unico Calculator: enter key parameters for quick estimate, built for overseas users. Calculadora de imposto salarial da ChinaChina salary tax calculator: calculate income tax from salary, insurance and deductions using progressive rates for payroll, one-click copy and offline. Conversão de valores RMB por extensoChinese amount uppercase converter: convert numbers to standard financial uppercase for invoices and contracts, with one-click copy and offline. Colombia Prima CalculatorColombia Prima Calculator: enter key parameters for quick estimate, built for overseas users. Denmark Income Tax CalculatorDenmark Income Tax Calculator: enter key parameters for quick estimate, built for overseas users. Calculadora de depreciação de ativosDepreciation calculator: calculate depreciation with straight-line and sum-of-years methods with yearly schedule for accounting, with one-click copy and offline. Digital Nomad Tax CalculatorDigital Nomad Tax Calculator: enter key parameters for quick estimate, built for overseas users. Ferramentas de contabilidade · 57 ferramentas →

Ferramentas para estudantes

Ferramentas de estudo, provas e produtividade para estudantes

CGPA to Percentage CalculatorCGPA to percentage: enter CGPA and scale to get percentage and grade with 9.5 or 10 multiplier for Indian students, multilingual. Gerador de citaçõesCitation generator: create APA, MLA, Chicago and GB/T 7714 references for books, journals and web with DOI auto-fill and batch export for papers. Contagem regressiva de provaExam countdown: set exam date to show remaining days, hours and study plan with multi-subject and reminders for exam pr Supports batch processing and one-click copy. Calculadora de nota final necessáriaFinal grade calculator: enter current scores, weights and target to get required final exam score and grade for student Supports batch processing and one-click copy. Calculadora de GPAGPA calculator: calculate weighted GPA from grades and credits supporting 4.0/5.0 scales with conversion for students, with one-click copy and offline. Conversor de escala GPAGPA scale converter: convert between 4.0/5.0 and percentage with credit-weighted GPA and multi-term cumulative for study abroad. Temporizador PomodoroPomodoro timer: focus 25 minutes and break 5 minutes with auto switch and alerts supporting custom durations for study and work, with one-click copy and offline. Gerador de plano de revisãoReview schedule: enter a start date and pick Ebbinghaus (days 1/2/4/7/15/30), weekly (3/7/14/30) or custom (1/3/5/7) plan for an instant review-date list with one-click copy. Calculadora de estatísticasStatistics calculator: compute sum, mean, median, mode, variance and deviation with chart for analysis, with one-click copy and offline. Calculadora de tempo de estudoStudy time calculator: allocate daily study time by subject and goal with progress tracking for exam prep, with one-click copy, offline and multilingual. Contador de palavras e caracteresWord count tool: count characters, words and paragraphs with reading time and keywords for writing and editing, with one-click copy, offline.

Ferramentas de e-commerce

Ferramentas de promoção, conversão e precificação para e-commerce

Calculadora de ticket médioAOV calculator: get average order value from total sales and orders with trend for e-commerce and operations, with one-click copy, offline. Calculadora de comissãoCommission calculator: get commission by sales, tiered rates and fixed bonus with tier comparison and net pay for sales incentives. Calculadora de taxa de conversãoConversion rate calculator: compute CTR, conversion rate and AOV from impressions and clicks for e-commerce, with one-click copy and offline. Calculadora de descontoDiscount calculator: calculate sale price from original or reverse to original quickly showing savings and final price for shopping, with one-click copy and offline. Calculadora de funil de conversãoFunnel calculator: enter stage counts to get conversion rates, drop-off and overall conversion with funnel chart for ops and sales. Calculadora de margem e markupGross margin calculator: enter revenue and cost to get gross profit, margin and markup with multi-product comparison for pricing. Calculadora de porcentagemPercentage calculator: four modes for share, value, change and reverse total with live formula for daily use, with one-click copy, offline and history. Calculadora de descontoPromo discount calculator: calculate final price and discount ratio for spend X save Y for e-commerce, with one-click copy and offline. Quotation GeneratorQuotation generator: fill client, line items, tax and validity to get a professional quotation text with copy and print for sales and e-commerce, multilingual. Calculadora de taxa de devoluçãoReturn rate calculator: get total and annualized return from start, end values and time with multiple cash flows for investment evaluation, with with one-click. Comparador de preço unitárioUnit price compare calculator: get unit price from price and quantity with cost comparison and savings for shopping, with one-click copy, offline.

Ferramentas de logística

Ferramentas de peso volumétrico e carregamento de contêineres para logística

Calculadora de carga de contêinerContainer loader: enter carton size and weight to estimate CBM and loads for 20GP/40GP/40HQ. For trade. Supports batch processing, export and one-click copy. Calculadora de CBMCBM calculator: calculate single and total volume from dimensions and quantity for logistics, with one-click copy and offline. Calculadora de data de entregaDelivery date calculator: estimate arrival from order date and shipping days excluding weekends for e-commerce, with one-click copy and offline. Calculadora de frete expressoExpress freight calculator: calculate delivery cost from first and additional weight with custom prices for e-commerce, with one-click copy and offline. Calculadora de giro de estoqueInventory turnover calculator: calculate turnover ratio and days from COGS and inventory with tips for warehouse and finance, with one-click copy and offline. Calculadora de carga de paletePallet calculator: get per-layer and per-pallet count from box and pallet size with stacking for logistics, with one-click copy, offline and history. Shipping Cost CalculatorShipping cost calculator: enter weight, distance and rate to get shipping cost for cross-border e-commerce and logistics, multilingual. Calculadora de peso volumétricoVolumetric weight: enters dimensions and weight to compute dimensional and billable weight. Supports batch processing, export and one-click copy, offline use. Calculadora de peso volumétricoVolumetric weight calculator: enter parcel dimensions to compare air (÷5000), express (÷6000) and sea (÷4000) divisors against actual weight for the chargeable weight. cm/in supported, copy and offline ready.

Ferramentas de fitness

Ferramentas de treino, força e queima de gordura para fitness

Calculadora de calorias de atividadeEstimate calories burned for common activities using MET values. Estimates calories by activity, duration and weight for fat loss. Calculadora de IMCBMI calculator: get BMI, BMI Prime, category and healthy range in metric or imperial with gauge for fitness, with one-click copy, offline and multilingual. Calculadora de BMRCalculadora de BMR online com unidades métricas e imperiais. Usa as fórmulas de Mifflin-St Jeor e Harris-Benedict para calcular BMR, TDEE, IMC e orientações de perda de gordura ou ganho muscular. Calculadora de gordura corporalBody fat calculator: based on US Navy and BMI formulas, enter height, weight and waist/hip to estimate body fat %, fat mass and health category. Calculadora de superfície corporalBSA calculator: calculate body surface area from height and weight using Mosteller formula for medical, with one-click copy and offline. Calculadora de calorias diáriasDaily calorie calculator: estimate maintenance calories from gender, age, height, weight and activity with tips for fitness, one-click copy and offline. Calculadora de déficit calóricoCalorie deficit calculator: enter maintenance calories, deficit and weight to estimate daily intake, weekly fat loss rate and time to goal with macro split for dieting. Calculadora de calorias de ciclismoCycling calories: estimates calories, power and fat burn by weight, time, speed and intensity with metric/imperial. Supports batch processing and one-click copy. Calculadora de zona de queimaFat burn zone: get max heart rate and fat burn/cardio zones by age and resting HR with charts and training tips for fat loss and cardio. Calculadora de reserva de FCHeart rate reserve: get reserve range and target HR by max and resting HR with Karvonen formula for training intensity. Supports batch processing and one-click copy. Zonas de frequência cardíacaHeart rate zones: divide into five zones by age and resting HR with charts and training tips for cardio and fat burn. Supports batch processing and one-click copy. Calculadora de peso idealIdeal weight calculator: uses Devine, Robinson, Miller formulas and BMI to compute ideal range. Supports batch processing, export and one-click copy, sharing. Ferramentas de fitness · 29 ferramentas →

Ferramentas de engenharia

Ferramentas de inclinação e volume de materiais para construção

Aggregates & Groundworks EstimatorAggregates estimator: enter volume, area or holes to estimate ballast, sand, shingle, hardcore, postcrete, blocks, paving, screed, self-leveller, render and asphalt with UK-standard coverage, waste and cost. Air Brick CalculatorAir brick calculator: wall length at 1.8m spacing for 215×65mm underfloor ventilation bricks. Angle Bead CalculatorAngle bead calculator: enter corner count and height for 2.4m galvanised beads and cost. Waste and price supported. Architrave CalculatorArchitrave calculator: door count for 70mm 2.1m sticks at 3 per door plus mitre waste. Arris Capping CalculatorArris capping calculator: fence length for 75×75 2.4m capping lengths with mitre waste. Asphalt Driveway CalculatorAsphalt calculator: driveway dimensions and depth for tonnage at 2.4t per m³, volume, truck loads and bags. Flush Back Box CalculatorFlush back box selector: gangs, wall type and available depth for dry-lining or 25/35mm metal box plus cut-out size. Tile Backer Board CalculatorBacker board calculator: area for 1200×600×12mm boards plus screws with cutting waste. Ballast CalculatorBallast calculator: pour volume for 20mm all-in ballast tonnes in 850kg bulk bags plus cement mix guide. Kitchen Base Unit CalculatorBase unit calculator: total run for a mix of standard 1000/800/600/500/400mm cabinets, door count and filler width. Bath Water & Heating CalculatorBath calculator: pick a standard UK tub size and fill level for full capacity, water used in litres and the kWh needed to heat it. Check your boiler or cylinder can cope. Bathroom & Kitchen EstimatorBathroom and kitchen estimator: enter counts, lengths or area to estimate WCs, basins, trays, baths, enclosures, worktops, sinks, taps, valves, copper and waste pipes, radiators and underfloor heating with UK sizes, waste and cost. Ferramentas de engenharia · 125 ferramentas →

Ferramentas profissionais

Ferramentas de salário, frequência e carreira para profissionais

Ferramentas para criadores

Ferramentas de tamanhos de plataforma, títulos e hashtags para criadores de conteúdo

Gerador de hashtagsHashtag generator: enter keywords to generate viral hashtags for Xiaohongshu and Instagram. Supports batch processing, export and one-click copy with sharing. Gerador de meta tagsMeta tag generator: creates title, description, keywords and Open Graph tags for SEO with preview. Supports batch processing, export and one-click copy, offline use. Gerador de imagem OGOG image generator: enter title and subtitle to generate 1200x630 social share image and download as PNG for social media, with one-click copy and offline. Guia de tamanhos de imagemPlatform image size lookup: covers Douyin, Kuaishou, Xiaohongshu, YouTube specs. Supports batch processing, export and one-click multilingual copy. Calculadora de tempo de leituraScript reading time calculator: get speaking time from word count and speed with paragraph estimate for hosting and dubbing, with one-click copy, offline. Pré-visualização de cartão socialSocial card preview: simulate WeChat, Facebook and Twitter share card effects for marketing, with one-click copy and offline. Extrator de informações sociaisSocial tag extractor: extract hashtags and mentions from text with frequency and dedup for social media and content, with one-click copy, offline and multilingual. Conversor de legendasSRT to VTT converter: upload SRT to get WebVTT with timestamp and style handling for video captions and web playback. Supports batch processing and one-click copy. Calculadora de tempo de legendasSubtitle timing tool: enter total duration and line count to evenly split times and generate SRT codes for video subtitling, with one-click copy and offline. Otimizador de títulosTitle optimizer: check title length against platform limits like Douyin and suggest improvements for clicks and exposure, with one-click copy and offline. Calculadora de quadros de vídeoVideo frame calculator: get total frames and duration from time and fps with bitrate estimate for editing, with one-click copy, offline. Calculadora de tempo de reproduçãoVideo playback calculator: calculate watch time from duration and speed or find required speed for courses, one-click copy and offline. Ferramentas para criadores · 13 ferramentas →

Ferramentas para pais

Ferramentas de idade do bebê e vacinas para pais

Calculadora de idade do bebêBaby age calculator: get months, days and milestones from birth date with growth chart for parenting, with one-click copy, offline and multilingual. Previsor de altura infantilChild height prediction: predict adult height range from parents height with genetic formula, gender and bone age correction plus growth curve for pediatrics. Calculadora de idade gestacionalGestational age calculator: get weeks, days and due date by last period or ultrasound with fetal development reference for prenatal care. Calculadora de ganho de peso na gravidezPregnancy weight gain guide: get total and weekly gain ranges from pre-pregnancy BMI for maternal health, one-click copy and offline. Calendário de vacinasVaccine schedule tool: reference for 0-6 year immunization including hepatitis B and polio months for parents, with one-click copy and offline.

Ferramentas de fotografia

Ferramentas de profundidade de campo e exposição para fotógrafos

Comparador de aberturaCompare two f-stops: stops apart and light ratio - for exposure and depth of field. Supports batch processing and one-click copy, offline use. Calculadora de fator de corteCrop factor calculator: calculate crop factor and 35mm equivalent from sensor size for photography, with one-click copy and offline. Calculadora de profundidade de campoDepth of field calculator: enter focal length, aperture, distance and sensor to get DoF, hyperfocal and CoC for photography and lens choice. Calculadora de exposiçãoExposure calculator: calculate EV and equivalent combinations from aperture, shutter and ISO for photography, with one-click copy and offline. Calculadora de distância hiperfocalHyperfocal distance: get hyperfocal and DoF range by focal length, aperture and sensor for landscape and panorama focus Supports batch processing and one-click copy. Calculadora de megapixelsMegapixel calculator: get total pixels and megapixels by resolution with print size and file size for photography and design. Calculadora de exposição com filtro NDND filter calculator: calculate exposure time with ND filter from base shutter and stops with settings for long exposure, one-click copy and offline. Calculadora de custo de impressão de fotosPhoto print cost calculator: calculate total cost and area from photo size, quantity and unit price with comparison for printing, with one-click copy and offline. Calculadora de tamanho de impressãoPrint size calculator: get print size from pixels and DPI with paper mapping for photo, poster and canvas, with one-click copy, offline and multilingual.

Ferramentas de idiomas

Ferramentas de vocabulário e texto para aprendizes de idiomas

Consulta de abreviações em inglêsAbbreviation lookup tool: enter abbreviation to get full form and meaning with multi-domain database for study and work, with one-click copy, offline with one-click. Solucionador de anagramasAnagram solver: find all anagrams from letters sorted by length and frequency for games and learning, with one-click copy, offline. Conversor de maiúsculas e minúsculasText case converter: convert between 11 cases like upper, lower, title and camel with character count for writing and coding, with one-click copy and offline. Gerador de flashcardsFlashcard generator: one card per line as term + delimiter + definition. Get a preview table plus Anki-ready tab-separated text with one-click copy. Tab/comma/pipe supported. Número por extenso em hindiHindi number to words converter: convert numbers to Hindi words Devanagari using Indian system for documents, with one-click copy and offline. Referência de verbos irregularesIrregular verbs: enter verb to get past and past participle with pronunciation and examples for English learning. Supports batch processing and one-click copy. Tradutor de código MorseMorse code translator: convert between text and Morse with audio playback and copy for learning and fun communication. Supports batch processing and one-click copy. Número por extensoNumber to words: converts numbers to English words (e.g., 123 → one hundred twenty-three). Supports batch processing, export and one-click copy, offline use. Conversor de plural em inglêsPlural form converter: enter singular to get plurals with irregular forms and examples in bulk for learning, with one-click copy, offline. Gerador de palavras aleatóriasRandom word generator: create words by length, initial and part of speech with count and dedup for writing and testing, with one-click copy, offline with one-click. Prática de ortografia em inglêsSpelling practice: random words by difficulty with audio, typing and instant correction, wordbook and progress for vocabulary and exams. Contador de sílabasSyllable counter: count syllables in text by word and sentence with multi-language and bulk for writing and poetry, with one-click copy, offline and multilingual. Ferramentas de idiomas · 15 ferramentas →

Ferramentas para músicos

Ferramentas de andamento, notas e transposição para músicos

Medir BPM (toque)BPM tap tempo: tap or press space to the beat for live BPM, average and stability with metronome. For music. Supports batch export, one-click copy and offline use. Calculadora de BPM para msBPM to milliseconds converter: calculate delay time from tempo and note value for music production, with one-click copy and offline. Localizador de acordesChord finder: pick a root and quality (major/minor/dim/aug/maj7/min7/dom7) to get chord tones and intervals instantly, with one-click copy. Gerador de progressões de acordesChord progressions: pick a key (C, G, D, A, E, F, Bb, Eb…) and style (pop, folk, rock, blues, ballad) for an instant diatonic progression with one-click copy. Referência de afinação de violãoGuitar tuning reference: pick standard, half-down, Drop D or Open G for open-string notes and frequencies (A4=440Hz) to tune with your tuner. No microphone detection. MetrônomoMetronome tool: adjustable tempo 40-240 BPM and beats per bar with accented first beat and sound and visual pulse for practice, with one-click copy and offline. Calculadora de intervalos musicaisMusic interval calculator: get interval name, semitones and frequency ratio by two notes for music theory and compositi Supports batch processing and one-click copy. Frequência de notasMusic note frequencies: look up note frequencies C0-B8 and MIDI numbers based on A4=440Hz with reference for music, with one-click copy and offline. Transpositor de notasNote transposer: enter original and target keys to transpose notes and fingerings for guitar, piano and jianpu for arranging, with copy, offline and history. Localizador de escalasScale finder: generate scale notes, fretboard and MIDI preview from mode and root with guitar and keyboard for composing, with one-click copy, with one-click copy,.

Ferramentas legais

Ferramentas de horas extras e férias anuais para o contexto trabalhista

Calculadora de férias anuaisAnnual leave calculator: get leave days from hire date and seniority with legal standard for HR and employees, with one-click copy, offline. Calculadora de duração de contratoContract duration calculator: enter start/end dates to get days, months and years, with business days and renewal reminders for legal and HR. Calculadora de taxa judicialCourt fee calculator (China): calculate filing and preservation fees by claim amount with bracket table for legal budgeting. Calculadora de horas extrasOvertime pay: computes pay at 1.5x weekday, 2x weekend and 3x holiday rates. For HR. Supports batch processing, export and one-click copy, sharing. Calculadora de rescisãoSeverance pay calculator: estimate compensation from monthly salary and years per one month per year for resignation and labor law, with one-click copy and offline.

Ferramentas gamer

Ferramentas de velocidade, reação e taxa de vitórias para jogadores

Treinador de miraAim trainer game: generate random targets with hit rate and reaction time, multi-difficulty and ranking for gaming and reflex, with one-click copy, offline. Teste de velocidade de clique (CPS)Click speed test: click as many times as possible in 5 or 10 seconds with live CPS and total count and ranking for gaming, with one-click copy and offline. Calculadora de probabilidade de dadosDice probability calculator: get sums, ranges and specific combos by dice count and sides with charts and simulation for board games and probability. Calculadora de probabilidade gachaGacha probability calculator: calculate probability of at least one hit and expected pulls for gacha planning, with one-click copy and offline. Teste de tempo de reaçãoReaction time test: wait for green and click, 5 rounds average with ranking for attention training and mini game, with one-click copy and offline. Guia de papéis lobisomemWerewolf guide: pick any role (werewolf, villager, seer, witch, hunter, guard, idiot) for skills and strategy tips with one-click copy. Distribuidor de papéis lobisomemWerewolf roles: pick a 6/9/12/15-player setup for a random mix of werewolves, villagers and special roles (seer, witch, hunter, guard) with one-click copy. Calculadora de taxa de vitóriasWin percentage calculator: calculate win rate, total games and win streak needed for target with chart for gaming and esports, with one-click copy and offline.

Ferramentas novas

Air Brick CalculatorAir brick calculator: wall length at 1.8m spacing for 215×65mm underfloor ventilation bricks. Architrave CalculatorArchitrave calculator: door count for 70mm 2.1m sticks at 3 per door plus mitre waste. Arris Capping CalculatorArris capping calculator: fence length for 75×75 2.4m capping lengths with mitre waste. Asphalt Driveway CalculatorAsphalt calculator: driveway dimensions and depth for tonnage at 2.4t per m³, volume, truck loads and bags. Flush Back Box CalculatorFlush back box selector: gangs, wall type and available depth for dry-lining or 25/35mm metal box plus cut-out size. Tile Backer Board CalculatorBacker board calculator: area for 1200×600×12mm boards plus screws with cutting waste. Ballast CalculatorBallast calculator: pour volume for 20mm all-in ballast tonnes in 850kg bulk bags plus cement mix guide. Kitchen Base Unit CalculatorBase unit calculator: total run for a mix of standard 1000/800/600/500/400mm cabinets, door count and filler width.