This calculator helps you understand your sleep efficiency.

1. Time Went to Bed: Select the time you got into bed with the intention of sleeping.
2. Time Woke Up: Select the final time you woke up and got out of bed.
3. Total Time Actually Asleep: Estimate the total amount of time you believe you were actually asleep during the period you were in bed. Exclude long periods of wakefulness.
   • Enter hours and minutes separately.

Calculation: Sleep Efficiency (%) = (Total Time Asleep / Total Time in Bed) * 100.

General Interpretation:

• 85% or higher: Generally considered good or efficient sleep.
• 80% – 84%: Fair sleep efficiency.
• 75% – 79%: May indicate some sleep difficulties.
• Below 75%: Often considered poor sleep efficiency; may warrant discussion with a healthcare provider if persistent.

Disclaimer: This tool is for informational purposes only and not a substitute for professional medical advice. If you have concerns about your sleep, please consult a healthcare professional.