Sleep Debt Calculator
Add up the sleep you missed across several short nights.
Quick answer: enter your details below and click Calculate Sleep Debt — your result appears instantly, right here in your browser. Nothing you enter is uploaded or stored.
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Enter your details below.
How to use
- Enter the sleep you need each night.
- Enter what you actually averaged.
- Enter the number of nights and click Calculate Sleep Debt.
About this tool
Sleep debt is the gap between the sleep you needed and the sleep you got, added across nights. Enter your nightly need, your actual nightly average, and the number of nights, and the tool totals the shortfall. It is a simple planning figure, not a medical sleep assessment.
Frequently asked questions
Is sleep debt a medical diagnosis?
No, it is an informal way of describing missed sleep, not a clinical measure.
What if the debt keeps growing?
A persistent large debt, loud snoring, or daytime sleepiness is worth raising with a clinician.