Calculate your maximum heart rate and the five training zones used to structure cardio, from recovery to maximum effort.
How it works
- Enter your age and resting heart rate.
- The engine uses the Tanaka formula and Karvonen method to compute thresholds.
- View your optimal Beats Per Minute for all five training zones.
Frequently asked questions
What are the zones for?
Zone 2 builds aerobic base, zone 4 raises threshold, zone 5 develops peak power. Most training should sit in lower zones.
Why use resting heart rate?
The Karvonen method personalizes zones to your fitness via heart-rate reserve, giving better targets than max-only formulas.
How do I find my resting heart rate?
Measure first thing in the morning before getting up, or read it from a fitness tracker over several nights.