◑ HEALTH Updated July 25, 2026

Sleep Debt Calculator

Put a number on how tired you actually are.

Sleep you need per night (h)
Average sleep last 7 nights (h)
Result
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How it works

Sleep debt is the nightly gap between the sleep you need and the sleep you got, multiplied across the week. Clearing it takes an extra hour or so a night rather than one long lie-in.

Related tools

◕BMR Calculator◈Calorie Calculator▣Body Fat Calculator

Frequently asked questions

Can I catch up at the weekend?

Partly. One long sleep helps, but repaying debt gradually over several nights restores alertness far better.

How much sleep do adults need?

Most adults need seven to nine hours; a consistent schedule matters as much as the total.

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