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Heart Rate Zone Calculator

Estimate heart rate training zones using an age-based maximum heart rate or the Karvonen formula with resting heart rate. Useful for structuring cardio workouts.

Enter your heart rate details

Best measured after waking up, before getting out of bed. Required for the Karvonen method.

Simple method uses a rough max heart rate estimate. Karvonen adjusts for your resting heart rate.

Enter your age (and resting heart rate if using Karvonen), choose a method, then tap “Calculate Zones” to see suggested heart rate ranges for training.

Disclaimer: These values are based on common formulas and generic training zones. They are not medical advice and may not be appropriate for everyone. Always talk to a healthcare professional before starting or changing an exercise program.