Heart Rate Zone Calculator
Calculate your five heart-rate training zones (warm-up to max effort) from your age, using the Karvonen method if you add a resting heart rate. Runs in your browser.
Runs in your browser — your file never leaves your deviceFrequently asked questions
Is Heart Rate Zone Calculator free to use?
Yes — Heart Rate Zone Calculator is completely free with no limits, no watermarks and no sign-up. It runs in your browser, so there is nothing to pay for.
Are my files uploaded or stored anywhere?
No. This tool does all its work locally in your browser using your own device's power. Your files never leave your device and we never see them.
Do I need to install anything or create an account?
No installation and no account needed. Heart Rate Zone Calculator works on any modern browser — Windows, Mac, Linux, Android and iPhone.
How do I use Heart Rate Zone Calculator?
Open the tool, add your file (or paste your content), adjust any options, then press “Calculate zones”. Your result is ready to download in seconds.
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