How to calculate heart rate

 You can calculate your heart rate using the following simple formula:

Heart Rate (beats per minute) = 60 / (R-R Interval in seconds)

Here's how to do it:

1. Find your pulse: You can usually find your pulse by placing your index and middle fingers on your wrist (radial artery) or the side of your neck (carotid artery).

2. Count the beats: Use a timer or a clock with a second hand. Start counting the beats when you see the timer start at zero, or when you hear the second-hand tick.

3. Measure the R-R Interval: Count the number of beats that occur in 60 seconds. This is your R-R Interval.

4. Calculate your heart rate: Use the formula mentioned above to calculate your heart rate. For example, if you counted 15 beats in 15 seconds, your heart rate would be 60 beats per minute (60 / 15 seconds).

Alternatively, you can use a heart rate monitor or a fitness tracker to get an instant and accurate heart rate reading.