About the Target Heart Rate Calculator
Find your heart rate zones for exercise with the Karvonen method. This tool is free, works in your browser and needs no sign-up.
How to use the Target Heart Rate Calculator
Enter your age and your resting heart rate in beats per minute.
Formula used
Max heart rate = 220 − age. Target = Resting + (Max − Resting) × intensity.
Example
With Age 30, Resting heart rate (bpm) 60, the calculator shows: Max heart rate = 190 bpm; Light (50–60%) = 125 – 138 bpm; Moderate (60–70%) = 138 – 151 bpm.
Frequently asked questions
Is the Target Heart Rate Calculator free to use?
Yes. It is completely free and you can use it as many times as you like.
How accurate is the Target Heart Rate Calculator?
The calculator uses standard formulas, so the maths is exact. Real life results can differ because of fees, taxes, rounding or personal factors, so treat the answer as an estimate.
Do you store the numbers I enter?
No. All calculations run in your browser. The values you type are not sent to our server.
Disclaimer: results are estimates for information only. They are not financial, medical or professional advice.