Does Heart Rate Zones upload my file or text to Tool-You servers?

No. Heart Rate Zones runs in this browser tab. Files stay on the device. Limit note: Fox 220 − age. Easy 50–70%, hard 70–85%. Not a stress test. Not medical advice.

Should I use Calorie Calculator instead of Heart Rate Zones?

Use Heart Rate Zones when you need Fox 220 minus age, then percent bands. Use Calorie Calculator when you need BMR, TDEE, and a daily calorie target. They share a category (Health) but not the same job.

Heart Rate Zones

Fox 220 minus age, then percent bands.

Max HR is 220 minus age. Easy is 50–70 percent; hard is 70–85 percent. Unlike the calorie calculator this is beats, not kcal. Unlike Age it is not a calendar span. Fox is a coarse estimate. Not medical advice.

What Heart Rate Zones does

The interactive controls for Heart Rate Zones load after this article so crawlers still read the instructions. Path /health/heart-rate-zones is the canonical address. Work happens on this device; Tool-You does not take a copy of the file or pasted text for Heart Rate Zones.

How to use Heart Rate Zones

Confirm you need Heart Rate Zones, not Calorie Calculator (BMR, TDEE, and a daily calorie target.). Address: /health/heart-rate-zones.
Enter the numbers or dates Heart Rate Zones uses. Fox 220 minus age, then percent bands.
Read the result as Heart Rate Zones defines it — not as Age Calculator (Years, months, and days from a birth date.). Max HR is 220 minus age. Easy is 50–70 percent; hard is 70–85 percent. Unlike the calorie calculator this is beats, not kcal. Unlike Age it is not a calendar span. Fox is a coarse estimate. Not medical advice.
Heart Rate Zones is an estimate in the browser, not professional advice. Fox 220 − age. Easy 50–70%, hard 70–85%. Not a stress test. Not medical advice.
Need a different formula? Try Age Calculator (Years, months, and days from a birth date.) instead of stretching Heart Rate Zones.

When not to use Heart Rate Zones

Skip Heart Rate Zones when a neighbor tool matches better — start with Calorie Calculator or Age Calculator — or when the description already warns the job will fail. In the tool’s own words: Max HR is 220 minus age. Easy is 50–70 percent; hard is 70–85 percent. Unlike the calorie calculator this is beats, not kcal. Unlike Age it is not a calendar span. Fox is a coarse estimate. Not medical advice.

Questions about Heart Rate Zones

What does Heart Rate Zones do that other Health pages on this site do not?: Max HR is 220 minus age. Easy is 50–70 percent; hard is 70–85 percent. Unlike the calorie calculator this is beats, not kcal. Unlike Age it is not a calendar span. Fox is a coarse estimate. Not medical advice. Short version: Fox 220 minus age, then percent bands.
Does Heart Rate Zones upload my file or text to Tool-You servers?: No. Heart Rate Zones runs in this browser tab. Files stay on the device. Limit note: Fox 220 − age. Easy 50–70%, hard 70–85%. Not a stress test. Not medical advice.
Should I use Calorie Calculator instead of Heart Rate Zones?: Use Heart Rate Zones when you need Fox 220 minus age, then percent bands. Use Calorie Calculator when you need BMR, TDEE, and a daily calorie target. They share a category (Health) but not the same job.
What are the limits of Heart Rate Zones?: Fox 220 − age. Easy 50–70%, hard 70–85%. Not a stress test. Not medical advice. Also: Max HR is 220 minus age. Easy is 50–70 percent; hard is 70–85 percent. Unlike the calorie calculator this is beats, not kcal. Unlike Age it is not a calendar span. Fox is a coarse estimate. Not medical advice.