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😴 Sleep Calculator
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Sleep Calculator

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Find the best time to go to bed or wake up based on 90-minute sleep cycles. Enter your wake-up time to get bedtimes, or enter your bedtime to get wake-up times - plus 'if I sleep now'.

Sleep Calculator 📦 4 KB

A full night's sleep consists of 5-6 cycles of about 90 minutes. Waking up between cycles - not in the middle of one - leaves you feeling more refreshed.