Optimal Bedtime Calculator
A sleep calculator helps you find the best times to go to bed based on 90-minute sleep cycles. Waking up at the end of a cycle can leave you feeling refreshed and energized.
Bedtime Calculator
Enter your desired wakeup time to find the best bedtimes based on 90-minute sleep cycles.
Why Sleep Cycles Matter
During sleep, your body goes through multiple 90-minute cycles of light sleep, deep sleep, and REM sleep. Waking up during deep sleep can cause grogginess and fatigue, while waking at the end of a cycle helps you feel more refreshed and alert.
How to Use This Calculator
Simply input your desired wake-up time, and our calculator will suggest optimal bedtimes that align with your natural sleep cycles, helping you achieve better quality rest and wake up feeling energized.
Last updated: Jun 2025