Sleep Efficiency Calculator
Share of your time in bed that you actually spent asleep.
Your result
Good sleep efficiency is generally 85% or more. Spending long periods awake in bed can weaken the bed–sleep link, which CBT for insomnia targets.
Medical disclaimer: This tool is for education and is not medical advice. Read more.
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Frequently asked questions
What does the Sleep Efficiency Calculator do?
Share of your time in bed that you actually spent asleep. Enter your values and the result and chart update instantly.
How accurate is it?
It uses published, widely used formulas. Results are estimates for education and planning, not a diagnosis. Talk to a qualified clinician about decisions affecting your health.
Is my information stored or shared?
No. All calculations run in your browser and nothing you type is sent to a server or saved.
What can I search to find this tool?
People find it by searching for: sleep efficiency percent; how much of bed time am i asleep; time in bed vs asleep.