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

No. Max Heart Rate runs in this browser tab. Files stay on the device. Limit note: Age 1–120. Formula estimates only. Not a clinical measurement.

Should I use Heart Rate Zones instead of Max Heart Rate?

Use Max Heart Rate when you need Estimate max HR with Fox, Tanaka, Gulati, or Oakland. Use Heart Rate Zones when you need Fox 220 minus age, then percent bands. They share a category (Health) but not the same job.

Max Heart Rate

Estimate max HR with Fox, Tanaka, Gulati, or Oakland.

Pick Fox 220−age, Tanaka 208−0.7×age, Gulati 206−0.88×age, or Oakland 211−0.64×age. Unlike Heart Rate Zones this does not split 50–85% bands. Unlike Karvonen HR this ignores resting pulse. Age outside 1–120 fails. Not a clinical estimate.

What Max Heart Rate does

Max Heart Rate sits in the Health group on purpose. It is not Heart Rate Zones (Fox 220 minus age, then percent bands.) and not Age Calculator (Years, months, and days from a birth date.). Choose this page when you need Estimate max HR with Fox, Tanaka, Gulati, or Oakland. If you stretch Max Heart Rate into a neighbor’s job, the result will look wrong even though the site chrome looks the same.

How to use Max Heart Rate

Confirm you need Max Heart Rate, not Heart Rate Zones (Fox 220 minus age, then percent bands.). Address: /health/max-heart-rate.
Enter the numbers or dates Max Heart Rate uses. Estimate max HR with Fox, Tanaka, Gulati, or Oakland.
Read the result as Max Heart Rate defines it — not as Age Calculator (Years, months, and days from a birth date.). Pick Fox 220−age, Tanaka 208−0.7×age, Gulati 206−0.88×age, or Oakland 211−0.64×age. Unlike Heart Rate Zones this does not split 50–85% bands. Unlike Karvonen HR this ignores resting pulse. Age outside 1–120 fails. Not a clinical estimate.
Max Heart Rate is an estimate in the browser, not professional advice. Age 1–120. Formula estimates only. Not a clinical measurement.
Need a different formula? Try Age Calculator (Years, months, and days from a birth date.) instead of stretching Max Heart Rate.

When not to use Max Heart Rate

Skip Max Heart Rate when a neighbor tool matches better — start with Heart Rate Zones or Age Calculator — or when the description already warns the job will fail. In the tool’s own words: Pick Fox 220−age, Tanaka 208−0.7×age, Gulati 206−0.88×age, or Oakland 211−0.64×age. Unlike Heart Rate Zones this does not split 50–85% bands. Unlike Karvonen HR this ignores resting pulse. Age outside 1–120 fails. Not a clinical estimate.

Questions about Max Heart Rate

What does Max Heart Rate do that other Health pages on this site do not?: Pick Fox 220−age, Tanaka 208−0.7×age, Gulati 206−0.88×age, or Oakland 211−0.64×age. Unlike Heart Rate Zones this does not split 50–85% bands. Unlike Karvonen HR this ignores resting pulse. Age outside 1–120 fails. Not a clinical estimate. Short version: Estimate max HR with Fox, Tanaka, Gulati, or Oakland.
Does Max Heart Rate upload my file or text to Tool-You servers?: No. Max Heart Rate runs in this browser tab. Files stay on the device. Limit note: Age 1–120. Formula estimates only. Not a clinical measurement.
Should I use Heart Rate Zones instead of Max Heart Rate?: Use Max Heart Rate when you need Estimate max HR with Fox, Tanaka, Gulati, or Oakland. Use Heart Rate Zones when you need Fox 220 minus age, then percent bands. They share a category (Health) but not the same job.
What are the limits of Max Heart Rate?: Age 1–120. Formula estimates only. Not a clinical measurement. Also: Pick Fox 220−age, Tanaka 208−0.7×age, Gulati 206−0.88×age, or Oakland 211−0.64×age. Unlike Heart Rate Zones this does not split 50–85% bands. Unlike Karvonen HR this ignores resting pulse. Age outside 1–120 fails. Not a clinical estimate.