Math
Base conversion, random numbers and math tools
Select a tool below. Every tool runs locally in your browser and is free to use.
📐 Math · Total 53 tools
24 Game Solver24 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.
Arithmetic Series CalculatorCalculate 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.
Máy tính nhị phânBinary calculator: support binary add subtract multiply divide and bitwise with decimal view for learning and dev, with one-click copy, offline.
Circle CalculatorCircle calculator: calculate area, circumference and diameter from radius, diameter or circumference for learning, with one-click copy and offline.
Complex Number CalculatorComplex number calculator: add, subtract, multiply and divide complex numbers with magnitude and conjugate, showing a+bi with polar view for math, one-click copy.
Confidence Interval CalculatorConfidence interval calculator: calculate interval from sample mean and size at 90/95/99% for statistics, with one-click copy and offline.
Correlation Coefficient CalculatorCorrelation coefficient: enter two datasets to get Pearson and Spearman with significance, scatter plot and regression for analysis.
Decimal to Fraction CalculatorDecimal to fraction converter: convert decimals to simplest fractions and mixed numbers with repeating detection for math, with one-click copy and offline.
Dilution CalculatorDilution calculator: calculate stock volume and solvent by C1V1=C2V2 with molarity and percent for lab and reagent preparation.
Point Distance CalculatorDistance between points: enter two points to get straight distance, midpoint and slope in 2D and 3D with unit conversion for math and surveying.
Máy tính giai thừaFactorial calculator: calculate n! with digit count supporting 0-170 using scientific notation for larger with tips for math, with one-click copy and offline.
Fibonacci Sequence CalculatorFibonacci calculator: generate sequence, get Nth term and sum by count with fast matrix and big integers for math and algorithms.
Fraction to Decimal & Percent CalculatorFraction to decimal converter: convert numerator and denominator to decimal and percentage with repeating detection for math, with one-click copy and offline.
Máy tính ước số chung lớn nhất / bội số chung nhỏ nhấtGCD and LCM calculator: enter multiple integers to get GCD and LCM with steps for math study. Supports batch processing and one-click copy.
GCF and LCM CalculatorGCF and LCM calculator: quickly get greatest common factor and least common multiple for multiple integers with fraction simplification for teaching.
Geometric Mean CalculatorGeometric mean calculator: enter values to get geometric mean, product and log average for growth rates and exponential averages.
Harmonic Mean CalculatorHarmonic mean calculator: enter values to get harmonic mean and reciprocal average for rate averaging and finance. Supports batch processing and one-click copy.
Haversine Distance CalculatorHaversine distance calculator: calculate great-circle distance from two coordinates for travel, with one-click copy and offline.
Máy tính thập lục phânHex calculator: add, subtract, multiply and divide hex with decimal conversion and bitwise ops for programming and embedded.
Linear Equation SolverLinear equation solver: solve one-variable and 2-variable linear systems by entering coefficients with steps and graph help for math study.
Linear Regression CalculatorLinear regression: enter two datasets to get regression equation, slope, intercept and R² with scatter plot for stats. Supports batch processing and one-click copy.
Log CalculatorLog calculator: get common, natural and any-base logarithms with change-of-base and steps for math study. Supports batch processing and one-click copy.
Margin of Error CalculatorMargin of error calculator: computes error margin and confidence interval by sample size and confidence. Supports batch processing, export and one-click copy.
Matrix CalculatorMatrix calculator: compute determinant, inverse and transpose for 2x2 and 3x3 matrices with step-by-step results for linear algebra, with one-click copy and offline.
Median & Mode CalculatorMedian and mode calculator: enter values to get median, mode, mean and range for statistics study. Supports batch processing and one-click copy.
Midpoint CalculatorMidpoint calculator: enter two points to get midpoint, distance and slope in 2D and 3D for math and surveying. Supports batch processing and one-click copy.
Modular Arithmetic CalculatorMod calculator: get remainder by dividend and divisor with big integers and negatives for programming and number theory Supports batch processing and one-click copy.
Molar Mass CalculatorMolar mass calculator: enter chemical formula to get molar mass, element percent and mole conversion with brackets and hydrates for chemistry.
Normal Distribution CalculatorNormal distribution calculator: enter mean, std and interval to get PDF, CDF and quantiles with chart for stats and data analysis, with offline copy and history.
Nth Root CalculatorNth root calculator: compute nth roots with power check for fractions and negatives for math and engineering, with one-click copy, offline and history.
Percentage Change CalculatorPercentage change calculator: calculate increase or decrease percent from original and new values for price comparison, with one-click copy and offline.
Máy tính chênh lệch phần trămPercentage difference calculator: get absolute and percentage difference from two numbers with formula for comparison, with one-click copy, offline and history.
Percent Error CalculatorPercentage error calculator: get absolute and percent error from true and measured values with formula for lab validation, with one-click copy, offline and history.
Máy tính hoán vị và tổ hợpPermutation and combination calculator: calculate P(n,r) and C(n,r) from total and pick count with formulas for math, with one-click copy and offline.
Regular Polygon Area CalculatorPolygon area calculator: calculate area and perimeter from sides and length with visualization for geometry, with one-click copy and offline.
Bộ kiểm tra số nguyên tốPrime checker: test if number is prime with factors and steps for large and bulk numbers for math, with one-click copy, offline and multilingual.
Prime Factorization CalculatorPrime factorization: factor integer into primes with tree and exponential form for big numbers, with one-click copy, offline and history.
Prime Number GeneratorPrime number generator: generate primes by range or count with filter, stats and export for research, with one-click copy, offline and multilingual.
Pythagorean Theorem CalculatorPythagorean theorem calculator: enter two sides to get third side with formula, area and angles, right-angle check and diagram for math and with one-click copy,.
Quadratic Equation SolverQuadratic equation solver: calculate discriminant, real roots, vertex and opening direction from coefficients with chart for math, with one-click copy and offline.
Máy tính tỷ lệRatio calculator: solve missing term from known ratios with cross-multiplication for recipes, scaling and allocation, with one-click copy, offline and multilingual.
Máy tính làm trònRounding calculator: round to chosen decimal places up, down or half-up showing original and result for finance and statistics, with one-click copy and offline.
Sample Size CalculatorSample size calculator: estimate sample size from confidence and margin with correction for surveys, with one-click copy and offline.
Scientific Notation CalculatorScientific notation calculator: add and multiply numbers in scientific notation with plain results for physics, with one-click copy and offline.
Scientific Notation ConverterScientific notation converter: convert between standard and scientific notation with significant figures and exponent for study and research, with with one-click.
Arithmetic & Geometric SequenceSequence calculator: compute nth term and sum from first term and difference/ratio for math, with one-click copy and offline.
3D Shape Volume Calculator3D shape volume calculator: compute volume and surface area of cubes and cylinders for learning, with one-click copy and offline.
Significant Figures CalculatorSignificant figures calculator: count sig figs and round to chosen digits with scientific notation for lab and homework, one-click copy and offline.
Sphere CalculatorSphere calculator: calculate diameter, circumference, volume and surface area from radius for learning, with one-click copy and offline.
Standard Deviation CalculatorStandard deviation calculator: get mean, variance and std dev from data list with visualization for statistics and teaching, with one-click copy, offline.
Triangle Area CalculatorTriangle area calculator: get area from base height, two sides angle or three sides with formula and diagram for math, with one-click copy, offline.
Vector CalculatorVector calculator: support add subtract, dot, cross and magnitude with visualization for math and physics, with one-click copy, offline.
Z-Score CalculatorZ score calculator: get Z score from value, mean and std dev with probability and interpretation for statistics, with one-click copy, offline and multilingual.
FAQ
What is the Math category?
The Math category includes 53 free online tools for common needs. All run locally in your browser - no sign-up or install required.
Are these tools free?
Yes, all tools are free with no usage limits.
Do I need to register?
No. Open a page and use it right away - your data stays in your browser.
Which languages are supported?
This site supports 12 languages: Chinese, English, Japanese, Korean, Spanish, French, German, Portuguese, Russian, Arabic, Indonesian and Hindi.