Question 1

How long does it take to fall asleep?

Accepted Answer

It takes the average person fifteen minutes to fall asleep.

Question 2

How long is a sleep cycle?

Accepted Answer

A good night's sleep consists of 5 to 6 complete sleep cycles. Each cycle lasts about 90 minutes.

Question 3

Why do I feel groggy when I wake up mid-cycle?

Accepted Answer

Waking up in the middle of a sleep cycle leaves you feeling tired and groggy, but waking up in between cycles prevents you from feeling tired and groggy.

Question 4

How does sleepytime calculate sleep cycles?

Accepted Answer

sleepytime calculates your sleep cycles and wakes you up in between cycles, so you wake up feeling refreshed and alert!

Sleep calculator: find the best time to wake up or go to bed using sleep cycles