Cardiology · Sports Medicine
Karvonen Target Heart Rate calculator
Enter the published formula inputs below to calculate and interpret this score.
Clinical inputs
Result
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Formula inputs
- Kthr Age Years (years)Accepted range: 10 to 90
- Kthr Resting Hr (bpm)Accepted range: 40 to 120
- Kthr Intensity Percent (%)Accepted range: 40 to 95
Primary source
Karvonen MJ et al. The effects of training on heart rate. Ann Med Exp Biol Fenn. DOI: 10.1080/00365521.1957.11812784. PMID: 13426654. Scope: Target HR = (HRmax − HRrest) × intensity fraction + HRrest; HRmax estimated as 220 − age. (1957)
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