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FIRE Number Calculator

FIRE number: get FIRE target and time to goal by annual expenses and withdrawal rate with inflation and return simulation for early retirement.

วิธีใช้งาน

Enter annual spending and savings to calculate your FIRE number and years automatically.

Overview

FIRE Number Calculator is a finance tool that FIRE number: get FIRE target and time to goal by annual expenses and withdrawal rate with inflation and return simulation for early retirement. 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

  • Estimate take-home and tax
  • Model cash flow and payback
  • Plan savings and SIP compounding
  • Compare mortgage amortization
  • Use it to cross-check “财务自由、FIRE” in reports, docs or APIs to avoid manual conversion errors

How to use

  1. 1 Enter principal/rate/term
  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

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

FAQ

Equal payment vs equal principal?
Equal payment is steady; equal principal saves total interest but starts higher.
Why a few dollars off from bank?
Day-count and rounding differences within 0.1%.
How is FIRE Number Calculator different?
It runs locally with a focus on speed and privacy, plus tolerant parsing for “财务自由、FIRE” 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.
Tip：Tip: Bookmark this page or pin the tab; find related tools via categories and search (convert → calculate → export).
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All calculations run locally in your browser; nothing is uploaded.