Heart Rate Zones Calculator
Find your target heart rate zones for training
100% private. Your files and inputs never leave your device — everything runs locally in your browser.
How to Use Heart Rate Zones Calculator
Find your target heart rate zones for training. No signup, no uploads, no watermarks.
- 1
Enter your numbers in the input fields.
- 2
Choose the calculation options or frequency.
- 3
The result updates instantly as you type.
- 4
Review the breakdown, chart, or schedule, and copy the answer.
Why choose Heart Rate Zones Calculator?
- No uploads — your files never leave your device.
- Free forever with no signup, no watermarks, and no limits.
- Works on any device with a modern browser — no installs.
- Fast, private, and built for getting the job done in seconds.
Frequently Asked Questions
Which heart rate zone burns the most fat?▾
The 'fat burn' zone (60–70% of max HR) burns a higher proportion of calories from fat, while higher zones burn more total calories overall.
Is 220 − age accurate?▾
It is a commonly used estimate that works well for most people but can vary by up to 15 bpm. A lab or field test gives a truly personalized max heart rate.
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