FIRE Number Calculator with Coast FIRE

Stop guessing when you can retire. This FIRE Number Calculator tells you your exact FIRE number, the year you’ll reach it, AND the Coast FIRE number that lets you stop aggressive saving — all from 12 simple inputs. Includes: FIRE number from your spending and your editable safe withdrawal rate; Coast FIRE number with an “already coasted?” check and coast age with zero further saving; reverse calculator for monthly savings needed to FIRE by any age you pick; what-if scenario grid (savings × returns → years to FIRE); 30-year year-by-year projection with FIRE and coasting years flagged. Educational tool only — not financial advice. Tested formulas, realistic sample data, plain-English Start Here guide. Works in Excel and Google Sheets. Instant download — no shipping, no waiting.