Sleep Calculator
Wake up refreshed — find bedtimes and wake times aligned to 90-minute sleep cycles.
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- Choose whether you're setting a wake-up time or a bedtime.
- Enter the time.
- Pick one of the suggested times to wake or sleep at the end of a full cycle.
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FAQ
Why 90-minute cycles?
A full sleep cycle averages about 90 minutes; waking at the end of one helps you feel less groggy.
What's the 14 minutes for?
It assumes the average person takes around 14 minutes to fall asleep.
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