Question: how to calculate your heart rate percentage?
Answer: To estimate your maximum age-related heart rate, subtract your age from 220. For example, for a 50-year-old person, the estimated maximum age-related heart rate would be calculated as 220 – 50 years = 170 beats per minute (bpm). The 64% and 76% levels would be: 64% level: 170 x 0.64 = 109 bpm, and.