Training / Tools / Heart Rate Zone Calculator

Heart Rate Zone Calculator

Enter your age (and resting heart rate, if you know it) to get your 5 running heart rate training zones, from easy recovery to max-effort speed work.

With a resting heart rate, this uses the Karvonen method (more accurate). Without it, it uses the standard 220 minus age formula.

Zones are the input. A plan is what does something with them.

Knowing your zones is step one. Knowing which runs to spend in which zone, and when, is what actually builds fitness for race day. RunLetters Half Marathon Coaching pairs you with a real coach (not an app) who builds your training around your zones and goal, and is in your corner from week one to the start line.

See the coaching program