Heart Rate Zones Calculator
Estimate training heart-rate zones from age and optional resting pulse. Screening estimate only — not medical advice.
Frequently asked questions
How are zones estimated?
Max HR uses 220 − age. Without resting pulse, zones are % of max. With resting pulse, Karvonen uses heart-rate reserve.
Is this medical advice?
No. Talk to a clinician before intense training. This is a screening estimate only — not medical advice.
Is anything uploaded?
No. Age and pulse stay in your browser.