Why this site exists
Most sleep calculators give you a number and nothing else. We wanted tools that show their working: why a bedtime lands where it does, why your blood pressure and your sleep belong in the same conversation, and exactly when to seek or avoid daylight after a long flight. Everything is free, there's no sign-up, and the calculators run entirely in your browser.
The tools
- Sleep calculator: bedtimes and alarm times that land between 90-minute sleep cycles.
- Blood pressure and sleep calculator: your ACC/AHA blood pressure category, how your sleep compares with the recommendation for your age, and the STOP-BANG sleep apnea screen.
- Jet lag calculator: a day-by-day plan for sleep and light, including flights with layovers.
- Tonight: a wind-down timer and a private sleep log that stays on your device.
How we write and check content
Our calculators and articles are based on published guidance and peer-reviewed research, including recommendations from the American Academy of Sleep Medicine, the National Sleep Foundation and the 2017 ACC/AHA blood pressure guideline. Each article lists its sources. We write in plain language, avoid hype, and say clearly when something is an estimate.
eyelovesleep is an information site, not a medical service. Please read our medical disclaimer.
How the site is funded
eyelovesleep is free to use and supported by ads from Google AdSense. Ads never change what the calculators tell you, and we don't sell or share anything you enter. Our privacy policy explains how ads and cookies work.
Get in touch
Spotted an error, have an idea for a tool, or want to say hello? Email hello@eyelovesleep.com or visit our contact page.
