Wake up refreshed

Sleep Cycle Calculator

Sleep happens in ~90-minute cycles. Waking at the end of a cycle feels easier than mid-cycle. Pick a goal below and we'll find your ideal times.

Best Rest
6 cycles
9:45 PM
9h of sleep
Best Rest
5 cycles
11:15 PM
7h 30m of sleep
4 cycles
12:45 AM
6h of sleep

Based on 90-minute cycles with ~15 minutes to fall asleep. Times are a guide, not a guarantee β€” your body knows best.

Try the Two-Minute Bedtime Ritual
A former army sleep instructor's simple routine to drift off faster tonight.