Target Heart Rate Calculator
Age
years
Resting heart rate
bpm
Measured lying still before getting up. A fit adult is 50-65; below 40 is common in trained endurance athletes.
Intensity
percent
Maximum heart rate from
Tanaka — 208 − 0.7 × age
Classic — 220 − age
The 220 − age rule has no published derivation and overestimates in the young and underestimates after about 40. Tanaka 2001 is the meta-analysis that replaced it.
Target heart rate (Karvonen)
145 bpm
Show the work
Target Heart Rate Calculator
by Rule Calculator