Heart Rate Zone Calculator — CalcWolf

Age

Resting Heart Rate (optional)

Method

Known Max HR (0 = estimate)

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Max Heart Rate

Zone 1 (Recovery) 50-60% —

Zone 2 (Fat Burn) 60-70% —

Zone 3 (Aerobic) 70-80% —

Zone 4 (Threshold) 80-90% —

Zone 5 (Max Effort) 90-100% —

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