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ZZZcalc.com
Bedtime calculator based on 90-minute sleep cycles
ZZZCalc calculates the ideal time to go to bed or wake up based on 90-minute sleep cycles plus the average 14 minutes it takes to fall asleep. Most bedtime advice ignores sleep cycles entirely — waking mid-cycle causes grogginess no matter how many hours you slept. Features: bedtime calculator, wake-up calculator, shift worker mode, and nap calculator. Completely free, no account required.
I built ZZZCalc because most bedtime advice ignores sleep cycles. If you wake up mid-cycle you feel groggy no matter how many hours you slept. This calculator adds 14 minutes fall-asleep time to 90-minute cycles to give you the exact times to aim for. Shift worker mode and nap calculator included. Completely free, no sign-up.
About ZZZcalc.com on Product Hunt
“Bedtime calculator based on 90-minute sleep cycles”
ZZZcalc.com was submitted on Product Hunt and earned 0 upvotes and 1 comments, placing #111 on the daily leaderboard. ZZZCalc calculates the ideal time to go to bed or wake up based on 90-minute sleep cycles plus the average 14 minutes it takes to fall asleep. Most bedtime advice ignores sleep cycles entirely — waking mid-cycle causes grogginess no matter how many hours you slept. Features: bedtime calculator, wake-up calculator, shift worker mode, and nap calculator. Completely free, no account required.
On the analytics side, ZZZcalc.com competes within Health & Fitness, Productivity and Developer Tools — topics that collectively have 1.2M followers on Product Hunt. The dashboard above tracks how ZZZcalc.com performed against the three products that launched closest to it on the same day.
Who hunted ZZZcalc.com?
ZZZcalc.com was hunted by Gerard Mcgovern. 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 ZZZcalc.com including community comment highlights and product details, visit the product overview.
Gerard Mcgovern