Recovering sleep debt usually takes more than one long lie-in — gradual, consistent nights work best.
How to use this calculator
Set your nightly sleep target (the amount you aim for each night — 7 to 9 hours is the range most adults need). Then enter how many hours you actually slept each night of the week. The calculator totals the shortfall across all seven nights to give you your weekly sleep debt.
Understanding your result
Your weekly sleep debt shows the total hours of sleep missed relative to your target. A small occasional deficit is normal. Persistent, growing debt over multiple weeks is associated with reduced concentration, mood, and wellbeing. The average nightly figure helps you spot patterns — for example, consistently lower hours on weekdays vs weekends.
Disclaimer
This calculator provides estimates for informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Sleep needs vary between individuals. If you have ongoing sleep problems, fatigue, or a suspected sleep disorder, consult a qualified healthcare provider.
Track your sleep with OptiAI
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