Sleep Calculator

Wake up refreshed with perfect sleep cycles

What it does

Calculate optimal wake-up times based on 90-minute sleep cycles. Get personalized recommendations for better sleep and wake up refreshed.

Wake Up Time2020 · ▲100
Fall asleep and actually wake up refreshed
Sleep CalculatorJul 2026 · sleepcalculator.io · ▲2
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I'm Sleepy2023 · ▲120
Bedtime sleep calculator for better mornings
Sleep Calculator UKAug 2026 · sleepcalculator.org.uk · ▲1
Calculate your ideal sleep and wake times — no signup.
Best Time For BedMay 2026 · besttimeforbed.com · ▲2
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Sleep Cycle CalculatorMay 2026 · navi-resources.com · ▲1
Free sleep calculator based on 90-min cycles

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