Sleep Calculator
Find the ideal bedtime or wake-up time based on 90-minute sleep cycles. Wake up refreshed and avoid grogginess with optimal sleep timing.
Calculate the best time to go to sleep or wake up based on natural 90-minute sleep cycles. Waking at the end of a cycle means you feel refreshed; waking mid-cycle causes grogginess. This calculator includes the average 14-minute time to fall asleep.
How it works
- 1Choose whether to calculate bedtime or wake-up time
- 2Enter your target wake-up time or when you plan to sleep
- 3The calculator adds 14 minutes to fall asleep automatically
- 4Pick the sleep time that works best for your schedule
Who uses this tool
- ✓People with inconsistent sleep schedules
- ✓Students pulling late nights
- ✓Shift workers planning rest
- ✓Parents timing naps
- ✓Anyone wanting to wake up energized
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