Heart Rate Zones

5 training zones from max HR. Use the Heart Rate Zones below — everything runs in your browser, nothing is uploaded.

Note: 220 minus age is a rough population estimate with large individual variation — trained athletes and people on heart medication often differ by 10–20 beats. Treat zones as a starting guide, not a prescription.

How it works

Enter your values in the Heart Rate Zones above. Results update instantly and stay on your device.

Formula and source

This tool applies its standard published method. Check the linked source for the exact definition.

Tips

• Double-check units before trusting a result.
• Bookmark the page — its address never changes.

FAQ