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REM Sleep Cycle & Wakeup Alarm Calculator

Calculate optimal bedtime and wake-up alarm times based on 90-minute REM sleep cycles.

Sleep Settings
Enter your schedule details.
Note: Calculations include a 14-minute average sleep onset latency.
Optimal Bedtimes
Based on 90-minute REM cycles.
09:46 PM
6 cycles (9 hrs sleep)
11:16 PM
5 cycles (7.5 hrs sleep)
Recommended
12:46 AM
4 cycles (6 hrs sleep)
REM Sleep Cycle & Wakeup Alarm Calculator | Toolzium - Toolzium