We built this site because we couldn't find a decent sleep calculator that wasn't buried in ads or stuck in 2005. So we made one ourselves.

Why this exists

Sleep science isn't complicated, but finding clear information about it online somehow is. We wanted a simple tool that tells you when to go to bed or when to set your alarm, based on how sleep cycles actually work. No account required, no upsell, no "download our app" pop-ups.

What's on the site

• A sleep calculator that figures out the best times to sleep or wake up so you're not jolted out of deep sleep by your alarm.
• A power nap calculator, because sometimes you just need 20 minutes and a timer that accounts for the time it takes to actually fall asleep.
• A plain-language breakdown of sleep cycles — what the stages are, how long they last, and why waking up mid-cycle feels so terrible.
• Sleep tips that go beyond "put your phone down" (though yes, that too).
• Blog posts covering everything from caffeine timing to what actually happens when you pull an all-nighter.

Meet the Team

We're not doctors or sleep scientists—just three people who struggled with sleep and got obsessed with fixing it.

Jamie Okonkwo

Founder & Content Lead

I've been a night owl my entire life—my brain just doesn't shut off before midnight. That was fine until I had twins and 5:45am became my new reality. For two years I survived on cold coffee and spite. I started obsessively reading sleep research because I was desperate, not curious. This site exists because no exhausted parent should have to dig through medical journals at 3am like I did.

Kevin Li

Developer & Reformed Workaholic

I used to wear my 4-hours-of-sleep schedule like a badge of honor. Grinding through my 20s in tech, sleeping was something that happened when the code shipped. By 31 I was burnt out, anxious, and couldn't sleep even when I tried. Took me two years to unfuck my sleep schedule. Built this calculator because all the existing ones looked like they were made in 2005.

Rachel Brennan

Research & Wellness Writer

I got into sleep science the hard way—a year of insomnia after my divorce left me researching solutions at 4am instead of actually sleeping. Tried everything: apps, supplements, weighted blankets, that weird military sleep method. Some worked, most didn't. Now I dig through the actual studies so you know what's worth trying and what's just marketing.

How the calculator works

The math is straightforward. A sleep cycle lasts about 90 minutes, and most adults go through 4 to 6 of them per night. If you wake up between cycles instead of in the middle of one, you feel dramatically better. That's basically the whole idea.

We use age-based recommendations from the National Sleep Foundation to suggest how many cycles you should aim for. The calculator adds 14 minutes for falling asleep (the average for most adults), then counts forward or backward in 90-minute blocks.

Get in touch

Found a bug? Have a suggestion? Just want to tell us the calculator actually worked? Email us at contact [at] sleepcalculator [dot] com.