How it works
Fill in the 3 fields above and Karvonen Heart Rate Calculator calculates the result instantly, recalculating as you change any value. It applies the formula ((HRmax − HRrest) × %) + HRrest. The math runs locally in your browser — nothing is sent to a server.
Formula
((HRmax − HRrest) × %) + HRrestExamples
- Age 30 yr, Resting heart rate 65 bpm, Intensity 70 % → Target heart rate: 153 bpm
Frequently asked questions
How do I use the Karvonen Heart Rate Calculator?
Enter your values in the 3 input fields and the result is calculated automatically as you type. Change any value to see the numbers update instantly.
What formula does the Karvonen Heart Rate Calculator use?
It uses ((HRmax − HRrest) × %) + HRrest. The calculation is performed in your browser using standard, well-established math for accurate results.
Is my data private?
Yes. The Karvonen Heart Rate Calculator runs entirely in your browser. Nothing you enter is uploaded, saved to a server, or shared — it never leaves your device.
Is the Karvonen Heart Rate Calculator free?
Yes, it is completely free with no sign-up, no limits and no watermarks. Like every tool on health & fitness and the rest of the platform, you can use it as often as you like.
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