Exercise
Heart Rate Zone Calculator
Train smart. Find your max heart rate and the 5 training zones — each one trains a different system.
FAQ
Tanaka vs 220-age? +
220-age (the old formula) overestimates for anyone over 40. Tanaka (208 - 0.7×age) is more accurate across ages.
What's the Karvonen formula? +
It uses your resting HR for a more personalized zone calculation. We use it too if you fill in resting HR.