Sleep Time Calculator

What it does

Free sleep calculator based on 90-min sleep cycles. Enter your wake time, get optimal bedtimes. Also works from bedtime, wake time. Customize cycle length & fall asleep time. Age-based recommendations (CDC). Privacy-first, no tracking. Built with Astro. Try it: yoursleeptimes.com

Free sleep cycle calculator based on 90-minute REM cycles. Calculate the best bedtime or wake time to wake up feeling rested. Customize your sleep settings.

A sleep time calculator helps you determine the best time to go to bed or wake up based on your natural sleep cycles. Each sleep cycle lasts approximately 90 minutes and includes light sleep, deep sleep (NREM), and REMfrom yoursleeptimes.com

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