Your heart rate zones

Five training zones in beats per minute. Add your resting heart rate and they are calculated from your heart rate reserve, which fits a trained runner better.

Free · No sign-up

Your numbers

Empty: estimated from your age as 208 − 0.7 × age.

Taken lying down when you wake up.

Estimated maximum184 bpm
MethodPercentage of maximum

Your zones

Zone 1 · Recovery

Warm-ups, cool-downs and the day after a race.

92–110 bpm50–60%
Zone 2 · Aerobic base

Easy runs and long runs. Where most of your kilometres should be.

110–129 bpm60–70%
Zone 3 · Tempo

Steady efforts and marathon pace. Breathing deeper, still in control.

129–147 bpm70–80%
Zone 4 · Threshold

Comfortably hard. Threshold intervals and 10K to half marathon pace.

147–166 bpm80–90%
Zone 5 · VO2max

Short, hard reps. A few minutes at a time at most.

166–184 bpm90–100%

An estimate, not a medical test. Formula maximums can be 10 beats off either way; a field test or a race finish gives a better figure.

Runs in your browser. Nothing you type or upload leaves your device.

Kibi for clubs

Easy days are better together

Zone 2 is where most of your running should be, and it is the pace of a club social run. Find a club near you on Kibi and never run alone.

How it works

  1. 01

    Enter your age, or your measured maximum heart rate if you know it.

  2. 02

    Add your resting heart rate for zones based on your heart rate reserve.

  3. 03

    Set the zones on your watch and train each session at the right effort.

Frequently asked questions

Take your maximum heart rate (measured, or estimated as 208 − 0.7 × age) and work out percentages of it. With your resting heart rate, use the Karvonen method: resting + (maximum − resting) × percentage.

220 − age underestimates the maximum of runners over 40. Tanaka's 2001 formula, 208 − 0.7 × age, fits adults of every age better.

Zone 2. It feels easy enough to hold a conversation, and it builds the aerobic base everything else sits on.