# Heart Rate Zone Calculator

> Calculate your training zones from maximum and resting heart rate.

To calculate heart rate training zones, enter your age and resting heart rate. Zones are derived with the Karvonen heart-rate-reserve method, which accounts for your fitness level rather than using a flat percentage of maximum heart rate.

**URL:** https://convertto.tech/t/heart-rate-zone-calculator
**Category:** Health & Fitness (https://convertto.tech/c/health-tools)
**Privacy:** Runs entirely in the browser; no upload
**Cost:** Free, no sign-up
**Last updated:** 2026-08-01

## Key facts

- **Privacy:** Runs entirely in your browser — nothing is uploaded
- **Cost:** Free, unlimited, no sign-up

## How to use

1. Set the age.
2. Set the resting heart rate.
3. Choose the max hr formula.
4. The result appears immediately — copy or download it.

## FAQ

### Which max heart rate formula is better?

Tanaka (208 − 0.7 × age) fits observed data better than the older 220 − age, especially for people over 40 where the classic formula underestimates. Both are population averages — an individual can be 10–20 bpm either side.

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