Find the best time to go to sleep or wake up based on 90-minute sleep cycles, so you wake up feeling refreshed.
Sleep cycles average about 90 minutes each. These times also add 15 minutes for the average time it takes to fall asleep.
Sleep happens in cycles of roughly 90 minutes. Waking up in the middle of a cycle often leaves you feeling groggy, while waking up between cycles tends to feel more refreshing. This calculator suggests bedtimes or wake-up times aligned to full sleep cycles.
Sleep happens in cycles of roughly 90 minutes. Waking up in the middle of a cycle often leaves you feeling groggy, while waking up between cycles tends to feel more refreshing.
It suggests bedtimes or wake-up times aligned to full sleep cycles, so you wake up feeling refreshed.
Yes, you can find the best wake-up time based on when you plan to go to sleep.
Yes, you can find the best bedtime based on when you need to wake up.
Waking up in the middle of a roughly 90-minute sleep cycle often leaves you feeling groggy, compared to waking up between cycles.