Calculator

Zone 2 calculator

Five heart-rate zones from your estimated maximum heart rate. Optionally enter a measured HRmax (replaces the estimate) and your resting heart rate (enables the Karvonen formula, which uses heart-rate reserve instead of just %HRmax).

Important

All results are estimates from published approximation formulas — not medical advice and not a diagnosis. If you have a medical condition, take medication, or are unsure, talk to your doctor first.

Related reading

From numbers to a plan

The app turns your details into a weekly plan that keeps adapting to you — including a protein anchor and heart-rate zones in the running module. Sign in via email login (beta, free).

Go to the app (closed beta) →

All content from Projekt Superhuman is provided solely for general information and motivation. It does not constitute medical advice, diagnosis, or treatment recommendations and does not replace a visit to a physician or a qualified professional. If you have an existing medical condition, take medication, are pregnant, or are unsure before starting a training or nutrition program, please seek medical advice beforehand. No results are guaranteed.

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