Heart rate zones

Age (and optional resting HR) → five training zones in bpm.

Calculated in this browser. Nothing is sent anywhere.

220−age is a population average — individual max HR varies by ±10–15 bpm. Not medical advice; stop and rest if you feel unwell. Ages 10–100.

How to use

  1. Enter your age.
  2. Optionally add resting heart rate.
  3. Read the five zone ranges.

What it supports

220−age and Karvonen are population estimates — individual max HR varies by ±10–15 bpm. Not medical advice.

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