Sleep Efficiency Calculator

Calculate the commonly used sleep-efficiency ratio from total sleep time and total time in bed. The result is a descriptive percentage and should not be used by itself to diagnose insomnia or another sleep disorder.

Maintained by Live Fitness Check. Last updated: August 13, 2026. How we test our calculators .

About This Calculator

The Sleep Efficiency Calculator compares reported total sleep time with total time in bed. It provides a descriptive percentage that is commonly used in sleep research and sleep diaries, while avoiding automatic clinical labels from one self-reported number.

Methodology

Sleep efficiency is calculated as total sleep time divided by time in bed and multiplied by 100. Awake minutes are time in bed minus total sleep time. The calculator requires total sleep time to be no greater than time in bed.

Sources

Reed DL, Sacco WP — Measuring Sleep Efficiency: What Should the Denominator Be?: https://pubmed.ncbi.nlm.nih.gov/26194727/

Disclaimer

Self-reported sleep time can be inaccurate, and sleep efficiency alone cannot diagnose insomnia or another sleep disorder. Seek professional assessment for persistent sleep problems or daytime impairment.