Sleep Debt Calculator
Calculate your accumulated sleep debt.
See how much sleep you owe your body and get a recovery timeline estimate.
Your Sleep Debt
Sleep debt is the difference between the sleep you need and the sleep you actually get, accumulated over time.
Daily Deficit = Recommended Sleep − Actual Sleep
Weekly Sleep Debt = Daily Deficit × 7
Recommended sleep by age:
| Age Group | Recommended Hours |
|---|---|
| Teens (13–17) | 8–10 hours |
| Adults (18–64) | 7–9 hours |
| Older adults (65+) | 7–8 hours |
Effects of sleep debt:
| Sleep Debt | Effects |
|---|---|
| 1–5 hours | Mild fatigue, reduced focus |
| 5–10 hours | Impaired judgment, mood changes |
| 10–20 hours | Significant cognitive decline |
| 20+ hours | Comparable to legal intoxication |
Recovery: You cannot fully “catch up” in one night. It takes roughly 4 days of extra sleep to recover from 1 hour of accumulated debt. Gradual recovery (30–60 extra minutes per night) is most effective.