Heart Rate Zone Calculator

Compute training heart-rate zones from your age and resting heart rate using the Karvonen (heart-rate reserve) method or a percentage of max HR. Runs locally; nothing uploaded.

Age

Resting HR (bpm, optional)

Max HR formula

Method

Zones use the common 50/60/70/80/90% boundaries. Karvonen: target = restingHR + pct·(maxHR − restingHR). Heuristic — consult a professional for training guidance.