Advertisement
Go to sleep at one of these times:(includes 15 min to fall asleep)
5:23 AM
3 cycles · 4.5 hours of sleep
3:53 AM
4 cycles · 6.0 hours of sleep
2:23 AM
5 cycles · 7.5 hours of sleep
12:53 AM
6 cycles · 9.0 hours of sleep
Each sleep cycle is approximately 90 minutes. Waking between cycles helps you feel more refreshed.
Advertisement
About this tool
Sleep Cycle Calculator — Find the best time to sleep or wake up based on 90-minute sleep cycles. This tool runs entirely in your browser. No data is sent to any server. Free to use, no account required.