Sleep patterns
Sleep shortfall calculator
Compare average sleep with a chosen target over several days. The difference is arithmetic, not a measurement of sleep quality or recovery.
Estimated shortfall against your target
Common questions
Before you use this estimate
Can I make up the difference in one night?
Recovery depends on more than the total hours. A regular sleep pattern matters; the tool cannot prescribe catch-up sleep.
What if I sleep enough but feel tired?
Persistent fatigue or sleepiness deserves assessment. Sleep quality, medicines and medical conditions can matter as well as duration.