Sleep efficiency is an indicator of how well you slept. In general, sleep efficiency is calculated as the percentage of pure sleep time without waking out of the total sleep time.
(actual sleep time / time in bed) x 100%.
Optimal sleep efficiency varies from person to person. However, in general, adults are considered to have an adequate sleep efficiency of 85% or higher, meaning that the amount of time they actually sleep without waking up is at least 85% of their total sleep time. These are not numbers that apply to everyone, and sleep efficiency varies from person to person. However, low sleep efficiency can lead to health problems caused by poor sleep, and should be managed.