Sleep calculator: when should I go to bed?
Waking at the end of a sleep cycle usually feels easier. Choose when you need to get up and see the best times to fall asleep.
1 viewPrivate by design: this tool runs in your browser. Nothing you add is uploaded.
How to use it
- Choose the time you want to wake up.
- Read the suggested times to fall asleep. They allow about 15 minutes to drift off.
- Or press "I'm going to bed now" to see good times to wake up.
Questions and answers
How much sleep do adults need?
Most adults need 7 to 9 hours a night; older adults often 7 to 8.
Is this medical advice?
No. If you often sleep badly or feel very tired, talk to a doctor.
What is a sleep cycle?
A stretch of about 90 minutes in which you pass through light, deep and dream sleep. Most nights have four to six.
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