Cardiology · Sport and Exercise Medicine
Heart Rate Reserve calculator
Enter the published formula inputs below to calculate and interpret this score.
Clinical inputs
years
Allowed range: 10–90 years
Quick picks
bpm
Allowed range: 40–120 bpm
Result
2 fields remaining
Anyone can run this calculator. Sign in to save, favourite, or send the result.
Ruqelo is AI and can make mistakes. Check important information.
Clinical inputs
- Age (years)Accepted range: 10 to 90
- Resting heart rate (bpm)Accepted range: 40 to 120
Primary source
Karvonen MJ, Kentala E, Mustala O. The effects of training on heart rate; a longitudinal study. Ann Med Exp Biol Fenn 1957;35(3):307-315. PMID 13470504. Heart rate reserve = peak HR − resting HR; Karvonen used peak HR measured on exercise testing. This calculator estimates peak HR as 220 − age. (1957)
View source