FREE · CALCULATORS & CONVERTERS
Heart Rate Reserve Calculator.
Calculate a target interval from supplied maximum/resting heart rate and intensity percentages.
How to use Heart Rate Reserve Calculator
Enter the relevant measurements or dates, select units and generate. Read the calculation method and limitations with the result.
How it works
Calculate a target interval from supplied maximum/resting heart rate and intensity percentages. Entered maximum is not predicted from age. Results do not determine medical suitability for exercise. This calculator provides arithmetic or an educational estimate; it does not replace professional assessment.
Example
Generate the supplied illustrative inputs and review the assumptions.
Questions about Heart Rate Reserve Calculator
Is Heart Rate Reserve Calculator free, and do I need an account?
Yes. This tool is free to use in your browser without an account. Processing takes place on your device.
What are the limits and what should I check?
Entered maximum is not predicted from age. Results do not determine medical suitability for exercise. Review the result before using it in your work.
Is my input sent to a server?
Your input is processed in your browser and is not uploaded by this tool. Files and pasted text are cleared when the page is refreshed. Normal website requests are still required to load the page and its libraries. Read the privacy explanation.