Sleep debt is the running gap between the sleep your body needs and the sleep you actually get. This tool compares each of your last seven nights to your age group's recommended sleep and shows the running total.
A small weekly debt is normal. Consistently large debts affect mood, focus, glucose tolerance, and immune function. Recovery is realistic across 3–7 nights of adding 60–90 minutes to your normal window, not one 12-hour Saturday.
Home · Guides · About · Privacy · Terms · Contact · Editorial Policy · Methodology