[header] How to find your resting heart rate [title] Choose the right time. [step] The formula for your resting heart rate is simple: it is the number of times your heart beats per minute while it is at rest. The key to calculating this rate is to make sure that you are actually at rest when you find your heart rate. 
Try calculating your heart rate first thing in the morning. [substeps] One of the best times to find your resting heart rate is before you even get out of bed in the morning.