Optimize your sleep for a refreshed morning.
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Enter the time you plan to go to bed. This **sleep calculator** will determine your **ideal wake up time** after completing 4 to 6 full 90-minute sleep cycles. Optimize your waking moment!
Enter a bedtime and click 'Calculate Times'.
Enter your desired wake-up time, and we'll calculate the **best bedtime** recommendations for full, uninterrupted **sleep cycles** and proper calculating sleep.
Enter a time and click 'Find Bedtimes'.
The **ideal wake time** depends on when you fall asleep. This sleep cycle calculator helps you find times that match the end of a 90-minute sleep cycle to minimize grogginess. This is crucial for successful **calculating sleep**.
Most experts recommend aiming for 5 or 6 full **sleep cycles**, which corresponds to 7.5 or 9 hours of sleep. Use our tool (or, as the French say, *le sleeps calculateur*) to plan this perfectly.
The **sleep cycle calculator** helps you synchronize your alarm with your natural sleep stages. Waking up during light sleep (between cycles) makes you feel more rested than waking up during deep REM sleep, helping you answer the question: **what time should I wake up**?
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