Online Clock > Sleep Calculator

Sleep Calculator

Sleep calculator to calculate your sleep time based on the time you wake up. Each sleeping cycle is 90 minutes, and it takes about 15 minutes for people to fall asleep. It is suggested that people should sleep for 4 to 6 sleep cycles each night.

What time do you want to wake up?

: :
Calculate Sleep Time
Sleep Cycles Sleep Time
6 7:30 am
5 6:00 am
4 4:30 am
3 3:00 am
2 1:30 am
1 12:00 am

The when to wake up calculator calculates the ideal wake up time if you go to sleep now.

If you want to go to sleep now

Calculate Wake up Time
Sleep Cycles Wake up Time
6 7:30 am
5 6:00 am
4 4:30 am
3 3:00 am
2 1:30 am
1 12:00 am
What Time Should I go to Bed if I Wake up at 3
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What Time Should I go to Bed if I Wake up at 9:30
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What Time Should I go to Bed if I Wake up at 10:30


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