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Heart Rate Zone Calculator
Training zones from age and resting HR.
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About Heart Rate Zone Calculator
Enter age and resting heart rate to get max HR and five Karvonen training zones.
📐 Methodology & Reference Accuracy:
Calculations, formulas, and conversions execute locally in your web browser. Output models are benchmarked against official reference standards and updated for 2026.
🔒 This tool runs entirely in your browser. Nothing is uploaded or stored.
Background reading: Heart Rate Zones on Wikipedia. More: all calculators.
Frequently Asked Questions about Heart Rate Zone Calculator
How do I use the Heart Rate Zone Calculator?
Open the Heart Rate Zone Calculator and use the controls in the workspace below: training zones from age and resting hr. Results appear instantly in your browser, with nothing to install, sign up for, or pay for.
Is the Heart Rate Zone Calculator free?
Yes. The Heart Rate Zone Calculator is completely free, like every tool in the PrimeFreeTools library. There are no accounts, subscriptions, or usage limits.
Does the Heart Rate Zone Calculator store or share my data?
No. The Heart Rate Zone Calculator runs with JavaScript in your browser, so what you enter never leaves your device and nothing is stored on a server.
What can I use the Heart Rate Zone Calculator for?
Enter age and resting heart rate to get max HR and five Karvonen training zones. You will find it grouped under Calculators together with 116 other free tools on the PrimeFreeTools homepage.
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