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経済的自立計算機

貯蓄と運用収益に基づいて経済的自立までの年数を見積もります。

はじめに

Financial Independence Calculator — Estimate years to financial independence based on savings and returns. Enter Current savings, Annual savings, Expected return (%), Annual expenses, Withdrawal rate (%) to get an instant, accurate result.

計算式

FIRE number = annual expenses ÷ withdrawal rate. Years to FI solves target = current×(1+r)^n + annual savings×[(1+r)^n − 1]/r for n, so both your current savings and your ongoing contributions grow at the assumed rate.

ステップごとの説明

  1. Enter the Current savings.
  2. Enter the Annual savings.
  3. Enter the Expected return (%).
  4. Enter the Annual expenses.
  5. Enter the Withdrawal rate (%).
  6. Click Calculate to see your result instantly.

実例

Example: With Current savings = 50000, Annual savings = 20000, Expected return (%) = 6, Annual expenses = 40000, Withdrawal rate (%) = 4, the Financial Independence Calculator gives Fire Number: 1000000, Years To Fi: 21.3928.

よくある質問

What if I already have enough saved?
The calculator returns 0 years to financial independence if your current savings already meet or exceed the target.
What if my savings rate or return is too low to ever reach the target?
The underlying equation can fail to resolve to a positive number of years in that case — increasing savings or the assumed rate is required.
What inputs does the Financial Independence Calculator need?
You'll need to provide: Current savings, Annual savings, Expected return (%), Annual expenses, Withdrawal rate (%). All fields use sensible defaults, so you can see a working example immediately and then adjust the values to match your own numbers.
How accurate is the Financial Independence Calculator?
The Financial Independence Calculator applies the formula exactly as calculated — FIRE number = annual expenses ÷ withdrawal rate. Years to FI solves target = current×(1+r)^n + annual savings×[(1+r)^n − 1]/r for n, so both your current savings and your ongoing contributions grow at the assumed rate. — so results are precise for the inputs you provide. Accuracy depends on entering correct, realistic input values.
Are these results guaranteed?
No. The Financial Independence Calculator gives an estimate based on the numbers you enter and standard financial formulas — actual rates, fees, taxes, and terms vary by lender, institution, and jurisdiction, and can change over time. This is not financial advice; consult a qualified financial professional for decisions specific to your situation.
Is the Financial Independence Calculator free to use?
Yes, the Financial Independence Calculator is completely free, requires no signup, and runs instantly in your browser.

経済的自立計算機について

The Financial Independence Calculator uses a real, verifiable formula — FIRE number = annual expenses ÷ withdrawal rate. Years to FI solves target = current×(1+r)^n + annual savings×[(1+r)^n − 1]/r for n, so both your current savings and your ongoing contributions grow at the assumed rate. — so results are accurate every time, not an approximation.