Target Heart Rate Calculator
Age
Heart rate zones for moderate and vigorous exercise (ACSM, Karvonen method).
Heart Rate Reserve Calculator
The gap between your maximum and resting heart rate.
Your result will appear here
Enter your measurements, then press Calculate.
Methodology
Karvonen heart rate reserve
HRR = HRmax (208 − 0.7 × age) − resting HR
Heart rate reserve is used to set exercise intensity (the Karvonen method).
- Who it is for
- Healthy adults.
- Version
- 1.0.0
Worked example: how to calculate heart rate reserve
Inputs
- Age
- 40 years
- Resting heart rate
- 60 beats/min
Result
- Heart rate reserve
- 120 beats/min
- Maximum heart rate (Tanaka)
- 180 beats/min
Calculation:
180 − 60 = 120
An illustration with sample values, worked out with the same method the tool above uses.
Limitations
- Depends on an estimated maximum heart rate.
References
- 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.
- Tanaka H, Monahan KD, Seals DR. Age-predicted maximal heart rate revisited. J Am Coll Cardiol. 2001;37(1):153–156. doi:10.1016/S0735-1097(00)01054-8
Continue with your measurements
Shared measurements carry over automatically, in this tab only.
Maximum Heart Rate Calculator
Age
Age-predicted maximum heart rate (Tanaka and the traditional 220 − age).