Karvonen Formula Calculator Karvonen Formula Calculator (For Age Over 40) Age: Resting Heart Rate (RHR): Calculate THR Zones Zones Lower Limit / Bound Upper Limit / Bound Zone 1 (50% - 60%) Zone 2 (60% - 70%) Zone 3 (70% - 80%) Zone 4 (80% - 90%) Zone 5 (90% - 100%)
Karvonen Formula Calculator Karvonen Formula Calculator (For Age 40 & less than 40) Age: Resting Heart Rate (RHR): Calculate THR Zones Zones Lower Limit / Bound Upper Limit / Bound Zone 1 (50% - 60%) Zone 2 (60% - 70%) Zone 3 (70% - 80%) Zone 4 (80% - 90%) Zone 5 (90% - 100%)