Health tool
Target Heart Rate Calculator
See training zones using both a maximum-heart-rate estimate and the more personalized Karvonen heart-rate-reserve method.
Heart-rate inputs
Estimated maximum
180 bpm
Classic 220-age estimate180 bpm
Easy (50–60%)120–132 bpm
Aerobic (60–70%)132–144 bpm
Tempo (70–80%)144–156 bpm
Threshold (80–90%)156–168 bpm
Maximum (90–100%)168–180 bpm
Use zones as guidance, not a diagnosis
Heart-rate zones are useful for pacing workouts. Resting heart rate can improve the Karvonen estimate, while medication, illness, heat, altitude, and fitness can change your response.
Stop exercise and seek medical guidance for concerning symptoms. People with cardiac conditions should follow a clinician's plan.
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