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Sleep Cycle & Wake-Up Calculator
Find optimal bedtimes or wake-up alarm times based on natural 90-minute REM sleep cycles.
Calculation Mode
I want to wake up at...
I'm going to sleep NOW
Desired Wake-Up Time
Time to Fall Asleep (Minutes)
5 Minutes (Fast)
10 Minutes
15 Minutes (Average)
20 Minutes
30 Minutes (Slower)
Calculate Sleep Times
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