How to Calculate Your Target Heart Rate
This table shows estimated target heart rates for different ages. Your maximum heart rate is about 220 minus your age.
In the age category closest to yours, read across to find your target heart rate. Heart rate during moderately intense activities is about 50-69% of your maximum heart rate, whereas heart rate during hard physical activity is about 70% to less than 90% of the maximum heart rate.
The figures are averages, so use them as general guidelines.
Age Target HR Zone 50-85% Maximum Heart Rate, 100%
20 years 100-170 beats per min 200 beats per minute
30 years 95-162 beats per min 190 beats per minute
35 years 93-157 beats per min 185 beats per minute
40 years 90-153 beats per min 180 beats per minute
45 years 88-149 beats per min 175 beats per minute
50 years 85-145 beats per min 170 beats per minute
55 years 83-140 beats per min 165 beats per minute
60 years 80-136 beats per min 160 beats per minute
65 years 78-132 beats per min 155 beats per minute
70 years 75-128 beats per min 150 beats per minute
Important Note: A few high blood pressure medications lower the maximum heart rate and thus the target zone rate. If you're taking such medicine, call your physician to find out if you need to use a lower target heart rate.
Note: The above information comes from the American Heart Association at heart.org