Heart Rate Calculator
Result
Heart Rate Calculator — free online calculator.
Formula
- Heart Rate Calculator calculates its result from Age, Resting Heart Rate. It uses the formula Max HR = 220 − Age; Heart Rate Reserve = Max HR − Resting HR; Zone = Resting HR + HRR × Intensity %. Change any input to recalculate the result instantly. This is an informational calculation and is not medical advice.
- The main inputs are Age, Resting Heart Rate. Enter them in the units and format shown in the calculator.
- Use the measurement units shown beside each field. The result is an estimate and should be interpreted in context.
- Changing any input above recalculates the result with the same calculation engine used by this page.
Example: Heart Rate
- Age: 30
- Resting Heart Rate: 65
Estimate max HR as 220 − age, HRR = max HR − resting HR, target zones = resting HR + HRR × intensity. These population estimates are not individualized medical advice.
Sample result: Calculating…
Frequently asked questions
What does the Heart Rate calculate?
Heart Rate Calculator — free online calculator.
Which values should I enter?
Enter Age, Resting Heart Rate using the units and format shown beside each field.
What formula does this calculator use?
The calculator uses the following relationship: Max HR = 220 − Age; Heart Rate Reserve = Max HR − Resting HR; Zone = Resting HR + HRR × Intensity %.
Why might my result differ from another source?
Results can differ because measurement methods, rounding and assumptions vary. This calculator is an estimate and is not a medical diagnosis.
Does the result update automatically?
Yes. Changing an input updates the result using the same calculation engine shown on this page.