Sleep Calculator

Wake up refreshed by aligning with 90-minute sleep cycles.

Best bedtimes

9:45 PM

9h · 6 cycles

11:15 PM

7.5h · 5 cycles

12:45 AM

6h · 4 cycles

2:15 AM

4.5h · 3 cycles

Includes ~15 minutes to fall asleep. Adults typically need 7–9 hours of sleep.

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