About the Sleep Debt Calculator
Accumulated sleep debt over a week compared with your target, and how to pay it back.
Also known as: sleep deficit, sleep debt tracker, weekly sleep, average sleep.
How to use this calculator
- Enter target sleep per night, mon, tue, wed and the other fields.
- The result updates instantly as you type — press Calculate (or Enter) at any time.
- Review the breakdown shown under the main result.
- Use Copy result or Share to save the answer or send a link with your inputs.
Formula
Debt = target × 7 − hours slept
Worked example
Using the values pre-filled in the calculator above:
- Target sleep per night = 8 hours
- Mon = 6.5 h
- Tue = 7 h
- Wed = 6 h
- Thu = 7.5 h
- Fri = 5.5 h
- Sat = 9 h
- Sun = 8.5 h
the calculator returns:
- Sleep debt: 6 hours
- Total slept: 50 hours
- Average per night: 7.14 hours
- Extra per night to repay in a week: 0.9 hours