Sleep calculator: when to go to bed
Choose the time you need to wake up, or that you're going to sleep now. You'll get times that end a full sleep cycle.
Your clients book on their own, 24/7
An online booking page, an AI agent that answers in 7 languages and automatic reminders.
See how it works
Result
Fill in the fields to see the result.
For general information only. It is not medical advice; for a personal answer, talk to a doctor or a dietitian.
Questions and answers
Why 90 minutes?
A sleep cycle lasts about 90 minutes. Waking at the end of a cycle, not in deep sleep, usually feels fresher.
How much sleep do adults need?
Most adults need 7โ9 hours, about 5โ6 cycles.
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