Your details
Measure first thing in the morning before getting up. Required for Karvonen method.
Used to tailor zone descriptions to your level.
Your zones
Enter your age and press
Calculate my zones
Calculate my zones
Maximum heart rate
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beats per minute
Fat-burning zone
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Cardio zone
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Heart rate zones are estimates based on population-level formulas and may not reflect your individual physiology. If you have a heart condition, are new to exercise, or experience chest pain, dizziness or shortness of breath during exertion, consult your GP before starting or increasing exercise intensity.