For the most accurate average heart rate visit a doctor and have him determine the heart beat count. Calculate your heart rate during exercise to make sure you are staying within a sustainable working zone 1. To get the most accurate reading you may want to repeat a few times and use the average of the three values.
Once you have calculated the number of big squares separating QRS complexes lets use 32 as an example perform the following calculation to determine heart rate.
What should my heart rate be. This is your heart rate or pulse measured in beats per minute. A normal heart beats at a steady rhythm like a clock tick tock tick tock. Add back in the resting heart rate of 60 to come to a working 50 to 85 percent range of 120 to 162 beats per minute.