Sleep debt is the running difference between how much sleep you need and how much you actually get. Small shortfalls on busy nights accumulate, and this calculator makes the total visible over a week. Set the nightly sleep you are aiming for, then enter the hours you slept each of the last seven nights. The tool adds up your actual sleep, compares it to your target for the week, and reports the shortfall or surplus in hours along with a nightly average. A positive debt means you are running short and may want to prioritise rest, while a surplus means you are ahead. Everything is calculated locally in your browser and nothing is uploaded. Sleep needs vary from person to person, so treat this as a general awareness tool rather than a medical measure, and see a professional for ongoing sleep problems.
It sums the shortfall between your nightly sleep goal and your actual sleep each night to give the total debt for the week.
Yes. A night above your goal produces a surplus that offsets shortfalls on other nights in the weekly total.
Adult guidance is often around 7 to 9 hours, and you set the goal that fits you.
Sleep debt is the running difference between how much sleep you need and how much you actually get. Small shortfalls on busy nights accumulate, and this calculator makes the total visible over a week.
Yes. Sleep Debt Calculator is completely free, with no sign-up and no usage limits.
Yes. Sleep Debt Calculator runs in any modern web browser. There is nothing to download or install.
Yes. Sleep Debt Calculator runs entirely on your device in your browser, so nothing you enter is uploaded to a server.