投資収益率計算機
ROI calculator: get ROI and annualized with formula from cost and gain for investment evaluation, with one-click copy, offline and multilingual.
使い方
元本、最終金額、保有年数を入力すると、投資収益率がリアルタイムで計算されます。
Overview
ROI Calculator is an Accounting tool. Get ROI and annualized with formula from cost and gain for investment evaluation, with one-click copy, offline and multilingual. 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 ROI Calculator: Enter principal, final amount and years to see ROI 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 ROI Calculator offline or on poor network — all calculations stay local and private.
- Compare mortgage amortization
- Estimate take-home and tax
How to use
- 1 Enter principal, final amount and years to see ROI instantly..
- 2 Toggle repayment methods to compare interest
- 3 Review schedule and charts
- 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
- Excludes fees/insurance
- Check prepayment penalties
- Nominal vs effective rate may differ
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 ROI Calculator different?
It runs locally with a focus on speed and privacy, plus tolerant parsing for “roi, return on investment” 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。