Target Heart Rate Zone Calculator, Karvonen Method

Enter your resting heart rate, (HRrest), your maximum heart rate (HRmax), and click the calculate button to show your target HR zones.


Intensity Zone HR
Zone I - Overdistance, Long-Distance-Slow
Zone II - Endurance, Strength, Body Speeds
Zone III - Endurance, Strength
Zone IV - Intervals, Uphill/Vertical, Race Pace
Zone V - Racing, peaking sprints