Estimate fitness age from resting heart rate, BMI, and age. Add age, resting heart rate, and BMI for an illustrative fitness-age estimate.
Complete the form and select “Calculate result.” Your measurements never leave this page.
A transparent overview of the inputs, method, and appropriate interpretation.
It adjusts chronological age using resting heart rate and BMI in a simple illustrative formula. This comparison is not a validated measure of biological age or a clinical assessment.
Illustrative fitness-age heuristicClear answers to help you understand and use your estimate.
Yes. It is free, runs in your browser, requires no account, and does not store the measurements you enter.
No. This result is an educational estimate, not a diagnosis or treatment recommendation. A qualified professional can interpret it within your complete health and training context.
Stress, caffeine, illness, sleep, medication, temperature, and the simplicity of the comparison model can influence the result.
Recalculate when the inputs change, using comparable resting measurements. Repeating this illustrative score cannot establish your biological age or health status.
Read our calculation methodology →Still have questions? Explore the guides ↗