Heart Rate Zone Calculator
%Max HR • Karvonen (HRR) • Zone goals • Ajax loading
Settings
HRR uses resting HR for more personalized zones.
If you know your tested max HR, choose Custom.
Quick summary
Enter age (and resting HR for HRR) to see zones.
Inputs
Used for 220 − age estimate (when enabled).
Whole bpm is standard in most training plans.
Zones
Max HR used
—bpm
Method
—
Zone
Goal
Intensity
Range (bpm)
Zone 1
Recovery
50–60%
—
Zone 2
Endurance
60–70%
—
Zone 3
Tempo
70–80%
—
Zone 4
Threshold
80–90%
—
Zone 5
VO₂ Max
90–100%
—
Updating…
Action
Hard reset: cancels pending updates and clears everything on the first click.