Sleep Cycle Calculator
Find the best times to wake up or go to sleep based on 90-minute sleep cycles.
About Sleep Cycles
A complete sleep cycle lasts about 90 minutes, cycling through light sleep, deep sleep, and REM. Waking between cycles (rather than during deep sleep) helps you feel more rested. Most adults need 5-6 full cycles (7.5-9 hours) per night.
About This Tool
The Sleep Cycle Calculator helps you determine the best times to wake up or go to sleep based on your personal sleep cycle. Ideal for individuals looking to optimize their sleep patterns and improve overall health.
Simply input your desired bedtime, and the tool calculates optimal waking times that align with natural sleep cycles. Outputs include suggested wake-up times for various sleep cycle lengths.
Use this tool to enhance your sleep quality without needing any sign-ups or personal data sharing. All calculations occur within your browser.