Wake Up Time Calculator
Health & FitnessCalculate the ideal bedtime or wake-up time to complete full 90-minute sleep cycles, working in either direction.
Recommended Time
Your recommended bedtime or wake-up time, based on completing full sleep cycles plus 15 minutes to fall asleep.
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Odeh Ahwal0people find this calculator helpful
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Calculator Stats
Creators
Odeh Ahwal0people find this calculator helpful
Views
Helpful
Saved
Embeds
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Frequently Asked Questions
How is this different from a standard sleep cycle calculator?
This calculator works in both directions. Enter your wake-up time to find your ideal bedtime, or enter your bedtime to find your ideal wake-up time, whichever you already know.
Why can I customize the cycle length?
While 90 minutes is the most commonly cited average sleep cycle length, individual cycle length can vary somewhat from person to person, so this calculator lets you fine-tune it if you have a sense of your own pattern.
Why add 15 minutes?
The extra 15 minutes accounts for the average time it takes to actually fall asleep after getting into bed, so your first full sleep cycle starts on time.
How many sleep cycles should I aim for?
Most adults benefit from 5 full sleep cycles per night, corresponding to roughly 7.5 hours of sleep, though individual needs vary.
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