Free FIRE calculator toolkit at coastfirehub.com.
- Coast FIRE Calculator — Find your Coast number. Supports couples mode and 3-scenario projections.
- Barista FIRE Calculator — Calculate your Barista FIRE number.
- Fat FIRE Calculator — Calculate your Fat FIRE number.
- FIRE Calculator — Universal FIRE calculator for all types.
- Coast FIRE Grid — Coast FIRE numbers by age, at a glance.
All calculators use consistent, source-backed assumptions:
| Parameter | Default | Source |
|---|---|---|
| Real return rate | 7% | S&P 500 historical avg minus 3% inflation |
| Safe Withdrawal Rate | 4% | Trinity Study (1998) |
| Inflation | 3% | US historical average |
| Retirement age (examples) | 65 | Gallup 2023 |