ToolForge

住宅ローン計算機

Mortgage calculator: support equal-payment and equal-principal mortgages with price and rate for home buying, with one-click copy and offline.

使い方

返済方式を選び、物件価格、頭金、金利、期間を入力すると、初回/最終月々支払い、総利息、簡潔な返済明細がすぐに更新されます。

Overview

Mortgage Calculator is a Finance tool. Support equal-payment and equal-principal mortgages with price and rate for home buying, with one-click copy and offline. It runs 100% in your browser with no upload, so you get instant results with privacy. Whether you need a quick answer or batch processing with precise control, you can enter, validate and export in seconds. The UI is responsive on mobile, tablet and desktop and supports one-click copy.

Use cases

  • Daily use of Mortgage Calculator: Choose a repayment method and enter price, down payment, rate and term; payment details update instantly. — enter and get instant results without manual lookup.
  • One-click copy keeps results ready to save, check or share with family and pros.
  • Use Mortgage Calculator offline or on poor network — all calculations stay local and private.
  • Compare mortgage amortization
  • Plan savings and SIP compounding

How to use

  1. 1 Choose a repayment method and enter price, down payment, rate and term; payment details update instantly..
  2. 2 Toggle repayment methods to compare interest
  3. 3 Review schedule and charts
  4. 4 Copy or export details

Highlights

  • Local & private: processing stays in your browser
  • Live validation with tolerant parsing
  • One-click copy and export for docs, code or sheets
  • Batch and offline support under poor network

Notes

  • Check prepayment penalties
  • Nominal vs effective rate may differ
  • Excludes fees/insurance

FAQ

Why a few dollars off from bank?
Day-count and rounding differences within 0.1%.
Equal payment vs equal principal?
Equal payment is steady; equal principal saves total interest but starts higher.
How is Mortgage Calculator different?
It runs locally with a focus on speed and privacy, plus tolerant parsing for “mortgage calculator, home loan calculator” and one-click copy for reuse.
Can I use results in official reports?
Use it as a working draft and cross-check with authoritative sources; keep the exported log and parameters for traceability.
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すべての計算はブラウザ内で実行され、データはアップロードされません。