Karvonen Heart Rate Calculator
Target HR = ((Max − Rest) × intensity) + Rest
| Zone | % HRR | BPM | Use |
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Karvonen method (using heart-rate reserve) is more accurate than %MaxHR alone for individuals with low resting HR.
How to use Karvonen Heart Rate Calculator
- Enter your maximum heart rate, resting heart rate, and target intensity percentage.
- Target heart rate calculates as ((Max − Resting) × intensity) + Resting — the Karvonen method, which accounts for your resting rate rather than just a flat percentage of max.
About this tool
Karvonen Heart Rate Calculator is a single-purpose utility on instant.tw, a free toolbox of calculators, converters, generators, and quick lookups. Everything works in your browser — nothing is uploaded, nothing is stored on a server unless explicitly noted.
Category: Health — Advanced. Browse more Health — Advanced tools.