what's your target heart rate ? Target Heart Rate Calculator Age (yrs) Heart Rate Zone Max Heart RateAnaerobic Zone (Performance Training)Aerobic Zone (Endurance Training)Fitness Zone (Fat Burning)Healthy Heart Zone Your Target Heart Rate is: bpm What Is BPM? The Maximum Heart Rate is a measure of the maximum number of times your heart can safely beat each minute. This number will decline with age. Tailor your cardio to your preferred heart rate training zone.