Compare calculators

Both calculators run independently — change the inputs on either side to compare results.

Weekly Sleep Debt Calculator

Compares the sleep you need each night with the sleep you actually get and totals the shortfall across a week. The result is your accumulated sleep debt — the number of hours you owe your body over seven days.

Sleep You Need Per Night (hours)

Sleep You Actually Get Per Night (hours)

Sleep

Sleep Efficiency Calculator

Measure what percentage of your time in bed is actually spent sleeping — a key clinical marker of sleep quality used in insomnia diagnosis and treatment. Efficiency above 85% indicates healthy sleep; under 80% suggests insomnia or fragmented sleep that warrants investigation.

Time Actually Asleep (hours)

Time Spent in Bed (hours)

Key differences

	Weekly Sleep Debt Calculator	Sleep Efficiency Calculator
Category	Sleep	Sleep
Inputs required	2	2
Result	Weekly Sleep Debt (hours)	Sleep Efficiency (%)
What it does	Compares the sleep you need each night with the sleep you actually get and totals the shortfall across a week. The result is your accumulated sleep debt — the number of hours you owe your body over seven days.	Measure what percentage of your time in bed is actually spent sleeping — a key clinical marker of sleep quality used in insomnia diagnosis and treatment. Efficiency above 85% indicates healthy sleep; under 80% suggests insomnia or fragmented sleep that warrants investigation.