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Sleep Cycle Calculator
Find the best time to go to bed or wake up so you wake between 90-minute sleep cycles and feel less groggy.
Tip from Tink: Waking at the end of a cycle feels easier than waking mid-cycle.
6 cycles · 9 h sleep
21:45
5 cycles · 7.5 h sleep
23:15
4 cycles · 6 h sleep
00:45
3 cycles · 4.5 h sleep
02:15
Go to bed at one of these times. Each sleep cycle is about 90 minutes, plus 15 minutes to fall asleep. Adults need 5–6 cycles.
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How to use the Sleep Cycle Calculator
- Choose whether you know your wake-up time or bedtime.
- Pick the time.
- Choose one of the suggested times.
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