Target Heart Rate Calculator (Karvonen)
Find a training heart rate at a chosen intensity using heart rate reserve, which allows for your resting pulse. Enter age, resting heart rate and…
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Find a training heart rate at a chosen intensity using heart rate reserve, which allows for your resting pulse. Enter age, resting heart rate and intensity to see target heart rate when you calculate.
For general information only, not medical advice. Consult a qualified health professional before making health decisions.
Worked example
Example calculated from the starting values. Enter your own values and press Calculate to get your result.
With the default inputs (age = 40 years, resting heart rate = 65 bpm, intensity = %70), the results are: target heart rate 146 bpm.
Quick reference: age vs result
Reference table based on the example values; it is not your calculation result.
| Age (years) | Target heart rate |
|---|---|
| 20 | 160 bpm |
| 40 | 146 bpm |
| 80 | 118 bpm |
| 200 | 34 bpm |
| 400 | -107 bpm |
| 800 | -387 bpm |
Frequently asked questions
What formula does this calculator use?
Target heart rate = (220-a-rhr) × inten ÷ 100+rhr. Variables: a = age in years, rhr = resting heart rate in bpm, inten = intensity in %.
What do I need to enter?
You need age (years), resting heart rate (bpm), intensity (%). Results update as you type.
What is an example result?
With the default inputs (age = 40 years, resting heart rate = 65 bpm, intensity = %70), the results are: target heart rate 146 bpm.
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