Most heart rate zones come from a generic formula, not from you. Enter your age below and we'll show you the same estimate your watch is probably using — then exactly how far off it could actually be.
Your Estimated Zones
Here's what your watch would say
Based on the standard 220−age formula — the same one most fitness watches and calorie apps use by default.
182
estimated max heart rate (bpm)
This is a formula, not a measurement. 220−age assumes everyone your age has the same max heart rate — but real max HR varies by 10–20 bpm between two people of identical age, before you even factor in fitness level or genetics.
Zones built on the wrong max HR train you too easy, or too hard, without you knowing
Your true aerobic and anaerobic thresholds aren't estimated by this formula at all — they're only found by testing
