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Sleep Calculator
Find your optimal wake-up time using 90-min sleep cycles
Science-based sleep calculator using 90-minute sleep cycles. Instantly find your optimal wake-up time and wake up refreshed. Free, no sign-up required.
Sleep Calculator helps you wake up feeling refreshed by calculating optimal wake-up times based on 90-minute sleep cycles. Each sleep cycle consists of light sleep, deep sleep, and REM sleep — waking up at the end of a cycle (rather than in the middle) is the key to avoiding morning grogginess. The tool includes both "Sleep Now" and custom bedtime modes, plus a reverse calculator that tells you when to go to bed if you need to wake up at a specific time. Free, no sign-up required.
Features:
• Instant wake-up time calculation based on current time or custom bedtime
• Reverse bedtime calculator (set your wake-up goal, get recommended bedtimes)
• Sleep quality assessment tools
• Science-backed blog articles on sleep health
• Mobile-friendly, no app install needed
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About Sleep Calculator on Product Hunt
“Find your optimal wake-up time using 90-min sleep cycles”
Sleep Calculator was submitted on Product Hunt and earned 0 upvotes and 1 comments, placing #69 on the daily leaderboard. Science-based sleep calculator using 90-minute sleep cycles. Instantly find your optimal wake-up time and wake up refreshed. Free, no sign-up required.
Sleep Calculator was featured in Health & Fitness (82.8k followers) on Product Hunt. Together, these topics include over 27.2k products, making this a competitive space to launch in.
Who hunted Sleep Calculator?
Sleep Calculator was hunted by yuan li. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
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yuan li