FIRE Number Calculator
Calculate your FIRE number from annual spending and a safe withdrawal rate.
Also known as: calculate fire number calculator, fire calculator, calculate fire number, retirement finance, retirement calculate fire number
Inputs
Results update when you click Calculate FIRE Number.
FIRE number
$1,375,000
StrengthOn the path
- Progress23.3%
- Gap remaining$1,055,000
- Annual spending$55,000
- Withdrawal rate4.0%
Monthly FIRE budget
$4,583
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What this result means
Calculate your FIRE number from annual spending and a safe withdrawal rate. FIRE number = Annual spending ÷ Withdrawal rate.
Assumptions
- Rule dependency: Universal formula / market assumptions.
- Optional fields use sensible defaults when left blank.
FIRE number
FIRE number = Annual spending ÷ Withdrawal rate.
Example
$55,000 spending at 4% → $1,375,000 FIRE number.
Frequently asked questions
What is the 4% rule?+
A planning heuristic from the Trinity study — not a guarantee. Many FIRE planners use 3–4% depending on horizon and flexibility.