Heart Rate Zone Calculator Heart Rate Zone Calculator Estimate your target heart rate zones for effective training. Age (years) Resting Heart Rate (BPM) Required for Karvonen method. Maximum Heart Rate (BPM) Auto Leave blank to auto-calculate (220 – Age), or enter manually. Calculation Method Standard Zones (% of MHR) Karvonen Method (% of HRR) Calculate Zones Reset Your Target Heart Rate Zones
