Enter your details
Your inputs stay in this browser. Results are informational estimates, not medical, dietary, or training prescriptions.
How to use the Heart Rate Zone Calculator
Enter the requested values and review the calculation as a planning estimate.
Enter your details
Enter age and a resting heart rate, then choose an equation and zone method.
Review the calculation
Review the predicted maximum and the five displayed beats-per-minute ranges.
Interpret with context
Predicted zones can differ from measured responses and are not medical advice.
Frequently Asked Questions
What are heart-rate training zones?
This calculator provides an informational estimate based on the values and method you select.
How is maximum heart rate estimated?
The result uses the displayed calculation method and updates when you change the inputs.
What is the Karvonen heart-rate-reserve method?
Individual circumstances and measurement differences can affect how the estimate should be interpreted.
Why does the calculator ask for resting heart rate?
Use the result as a planning reference rather than a diagnosis, prescription, or guarantee.
Are predicted maximum heart rates exact?
Choose the unit that matches your measurement wherever a unit selector is available.
How should I measure resting heart rate?
For the most useful comparison, enter recent measurements and use consistent input units.
When should I seek medical advice about exercise?
Seek advice from an appropriately qualified professional for personal medical, nutrition, or training decisions.