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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.
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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 #114 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.
ZZZcalc.com was featured in Health & Fitness (82.6k followers), Productivity (651.7k followers) and Developer Tools (512.4k followers) on Product Hunt. Together, these topics include over 227.2k products, making this a competitive space to launch in.
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.
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Gerard Mcgovern