Heart Rate Training Zones 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.

    An asterisk (*) indicates a required field.



    Karvonen 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