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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
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.
On the analytics side, Sleep Calculator competes within Health & Fitness — topics that collectively have 82.8k followers on Product Hunt. The dashboard above tracks how Sleep Calculator performed against the three products that launched closest to it on the same day.
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.
For a complete overview of Sleep Calculator including community comment highlights and product details, visit the product overview.
yuan li