Target Heart Rate Calculator
The Karvonen formula personalises your training zones using your resting heart rate, not just your age — more accurate than a flat percentage of max HR.
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How this works
Karvonen formula: Target HR = ((Max HR − Resting HR) × intensity%) + Resting HR, shown here for moderate (50–70%) and vigorous (70–85%) intensity, per standard exercise-physiology guidance.
Medical disclaimer
This tool provides general health information based on published formulas and guidelines. It is not a medical diagnosis and does not replace advice from a qualified doctor. If you have a health concern, please consult a physician or book a consultation on IMCURE.
Frequently asked questions
How do I measure resting heart rate?
Count your pulse for 60 seconds first thing in the morning, before getting out of bed, for the most accurate reading.
