To measure your sleep efficiency, try to get in the habit of turning sleep mode on when go to bed with the intention of falling asleep, and off as soon as you wake up. Turning sleep mode on and off lets us know how long you were intending to sleep. We use that timeframe, along with sleep data from your watch, which automatically senses when you wake up during the night, to calculate the percentage of time you were in bed and actually asleep - your sleep efficiency.

A normal sleep efficiency for adults is approximately 80% or higher. Older adults (60+), who tend do wake more often during the night, usually have a lower sleep efficiency of around 70%. If you’ve slept less for several nights in a row, or if you typically don’t sleep for long, your sleep efficiency may actually be higher than for people who spend more time in bed.

Note: your sleep data is an estimation only and not intended to diagnose or monitor sleep conditions. If you feel you have a chronic sleep condition, please consult with your doctor.