Sleep Calculator UK
Calculate your ideal sleep and wake times — no signup.
Sleep Calculator UK launched on August 7, 2026 with 1 votes, #11,494 of 23,274 launches that month.
What it does
Find out the best time to go to bed or wake up, based on full 90-minute sleep cycles, so you wake up feeling rested. Calculate Now!
A sleep calculator works out the best bedtime or wake-up time by counting backwards or forwards in complete 90-minute sleep cycles, rather than a fixed number of hours. Enter a wake-up time or a bedtime below, and you'll get several options — each one ending at the natural break between cycles, so you wake up during light sleep instead of deep or REM sleep. We assume it takes about 14 minutes to fall asleep, then count backwards in full 90-minute cycles. Most adults need 5 to 6 complete sleep cycles a night. Falling asleep exactly on schedule isn't essential — these times are a strong starting guide, not an exact science. Most adults need 5 to 6 complete sleep cycles a night — that's why…from sleepcalculator.org.uk
Does a similar job
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Best Time For BedMay 2026 · besttimeforbed.com · ▲2Find your perfect bedtime based on 90-minute sleep cycles
Calculate Sleep And Wake Up Refreshed2024 · sleepcalculator.app · ▲7Calculate when to go to bed to wake up refreshed
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