According to the Sleep Foundation, a normal heart rate during sleep drops to between 40 and 50 beats per minute (bpm) . However, it is important to note that there is variability between individuals and factors such as sleep stage can affect heart rate during sleep. Here are some key points to keep in mind:

• A normal resting heart rate is typically between 60 and 100 bpm.
• During sleep, a persons heart rate should typically be lower than their resting heart rate during the day.
• For most healthy adults, a normal sleeping heart rate is usually 10-20% lower than the resting heart rate during the day, which translates to a sleeping heart rate between 50-70 bpm.
• It is not uncommon for a persons heart rate to briefly drop as low as 30 bpm while sleeping in a healthy individual.
• Heart rate can vary from person to person and can also change from day to day, depending on factors such as hydration level, elevation, physical activity, and body temperature.

It is important to consult with a medical provider if you have any concerns or symptoms regarding your heart rate during sleep.