// multi-utility computation suite · offline · instant · precise
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health.sleep-efficiency-calculator Calculator
Calculates sleep efficiency percentage and weekly sleep score, and recommends sleep restriction therapy if efficiency is consistently below 85%. CBT-I (Cognitive Behavioural Therapy for Insomnia) uses sleep efficiency above 85% as the threshold for extending time in bed.
Inputs
Time In Bed Hr
Duration of the process. Make sure units match the rate inputs (seconds, minutes, or hours).
Sleep Onset Min
Duration of the process. Make sure units match the rate inputs (seconds, minutes, or hours).
Wakeups Min
Duration of the process. Make sure units match the rate inputs (seconds, minutes, or hours).
Early Wake Min
Reference formula or conversion factor shown for context.
Results
sleep efficiency
Useful output divided by total input, as a percentage. True 100% efficiency is impossible — losses appear as heat. LEDs: 30–50%. Electric motors: 85–97%. Switching supplies: 85–95%.
total sleep time (hours)
The result expressed in hours. Divide by 24 to convert to days.
wasted time in bed (min)
The computed duration or time value.
SE classification
Category assigned based on where the computed value falls on a defined scale. Check which standard or guideline defines these boundaries.
sleep restriction therapy
APY (annual percentage yield) — total return including compound interest over a year. Compare protocols by APY, but check reward token inflation first.