Sleep Calculator
Find ideal bedtimes or wake times based on 90-minute sleep cycles.
Sleep Schedule
Info only. Not medical advice.
Sleep Schedule
Choose a time to see recommended sleep or wake times.
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Learn more about Sleep
How Sleep Cycles Work
Most sleep cycles last about 90 minutes. Waking up between cycles can help you feel more rested. This calculator suggests bedtimes or wake times based on common cycle lengths.
- Aim for 4-6 cycles (6 to 9 hours) whenever possible.
- Keep a consistent schedule to improve sleep quality.
- Reduce screen time and caffeine close to bedtime.
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