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Calculate optimal sleep and wake times based on 90-minute sleep cycles. Free sleep calculator to help you wake up refreshed and improve your sleep quality.
Sleep CalculatorWake up right—sleep cycles calculated for you
Erdal SATIKleft a comment
👋 Hey Product Hunters! I built SleepCalc after realizing the most-asked 2 a.m. question is “What time should I wake up if I go to bed now?” Existing “sleep calculators” were either buried in ads, gated behind app downloads, or ignored the 15-minute “fall-asleep” window that makes the math actually work. So I stripped the idea down to a single, lightning-fast web page—no sign-ups, no cookies...
Sleep CalculatorWake up right—sleep cycles calculated for you