Calculate your weekly sleep debt, quality score, and health impact. Enter nightly hours and get a shareable sleep report.
The Sleep Debt Calculator reveals how much sleep you're missing every week — and what it's costing you. Enter your actual sleep hours for each night of the week, and get a complete report: weekly debt, quality score, health risk level, estimated productivity impact, and even how many coffees you'd need to compensate.
Sleep debt accumulates silently. Most people don't realize that sleeping just 1 hour less than recommended adds up to over 52 hours of lost sleep per year. This tool makes the invisible visible, with a shareable report card you can save or post to social media.
Sleep debt is the cumulative difference between the sleep you need and the sleep you actually get. If you need 8 hours but sleep 6, you accumulate 2 hours of debt per night — 14 hours per week.
Partially. Short-term debt (a few days) can be recovered with extra sleep over 1–2 nights. Chronic debt (weeks/months) takes longer and can't be fully "repaid" — the health effects may persist.
Most adults (26–64) need 7–9 hours per night according to the National Sleep Foundation. Teens need 8–10 hours, and seniors (65+) need 7–8 hours.
The quality score (0–100) combines two factors: how close your total sleep is to the target (70% weight) and how consistent your schedule is (30% weight). Higher is better.
Health risk is based on how far your average sleep falls below the minimum recommended hours. Sleeping at or above the minimum = low risk. Each hour below increases the risk level.
Yes. Research shows irregular sleep schedules (e.g., 5 hours on weekdays, 10 on weekends) are worse for health than consistent moderate sleep. The consistency score reflects this.