Heart Rate Reserve Calculator
Use the Heart Rate Reserve Calculator to estimate exercise ranges from age, resting pulse, and selected intensity as a clear general estimate, not a diagnosis or medical advice.
Heart Rate Reserve Calculator
Tool inputs are not stored, and private values stay out of analytics.
Result
How it works
Enter the requested values, check the units, then run the Heart Rate Reserve Calculator for a copyable informational estimate.
The tool works by Karvonen-style arithmetic using 220 minus age and resting pulse; general guide only. The result is a general estimate that cannot account for every individual factor and does not replace a clinician. Inputs stay in the browser.
Examples
Practical example
Age 40 with resting pulse 60 and 50–70% intensity gives a calculated range.
Method and source
Official source: American Heart Association Target Heart Rates (General exercise guide). https://www.heart.org/en/healthy-living/exercise-and-physical-activity/fitness-basics/target-heart-rates
FAQ
How do I use the Heart Rate Reserve Calculator?
Enter accurate measurements, calculate, and read the safety note shown with the result.
Is this a medical diagnosis?
No. The result is informational only and does not diagnose a condition or replace a healthcare professional.
Are health inputs stored?
No. Processing stays in the browser and field values are not sent to analytics or the database.