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.

- First, determine the total time asleep (hrs).
- Next, determine the total time spent in bed (hrs).
- Next, gather the formula from above = SE = TS / TB * 100.
- Finally, calculate the Sleep Efficiency.
- 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** **= ?