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Heart Rate Zone Calculator
Calculate your five training heart-rate zones from your age — recovery to max effort — for smarter cardio.
How to use this tool
- 1Paste or type your input above.
- 2The result updates instantly.
- 3Copy the output with one click.
Frequently asked questions
What heart rate zone burns the most fat?+
Zone 2 (60–70% of max HR) uses the highest share of fat for fuel and builds aerobic base — but higher zones burn more total calories per minute.
Is my data private?+
Yes. The tool runs entirely in your browser — nothing you paste or type is uploaded to a server.
Learn more
- Heart Rate Zone Calculator: how it works
- heart rate zone calculator tips
- Heart Rate Zone Calculator FAQs