Enter the total time asleep (hrs) and the total time spent in bed (hrs) into the Sleep Efficiency Calculator. The calculator will evaluate the Sleep Efficiency. 

Sleep Efficiency Formula

The following two example problems outline the steps and information needed to calculate the Sleep Efficiency.

SE = TS / TB * 100

Variables:

  • SE is the Sleep Efficiency (%)
  • TS is the total time asleep (hrs) 
  • TB is the total time spent in bed (hrs) 

How to Calculate Sleep Efficiency?

The following steps outline how to calculate the Sleep Efficiency.


  1. First, determine the total time asleep (hrs). 
  2. Next, determine the total time spent in bed (hrs). 
  3. Next, gather the formula from above = SE = TS / TB * 100.
  4. Finally, calculate the Sleep Efficiency.
  5. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem : 

Use the following variables as an example problem to test your knowledge.

total time asleep (hrs) = 8.5

total time spent in bed (hrs) = 9

SE = TS / TB * 100 = ?