Sleep Calculator

Calculate the best bedtimes and wake-up times based on 90-minute sleep cycles to wake up feeling refreshed.

Sleep Schedule

Go to Sleep AtSleep DurationCyclesQuality
9:16 PM9h 0m6Optimal (9h)
10:46 PM7h 30m5Great (7.5h)
12:16 AM6h 0m4Good (6h)
1:46 AM4h 30m3Minimum (4.5h)
3:16 AM3h 0m2Poor (3h)

* Assumes ~14 minutes to fall asleep. Times based on 90-minute sleep cycles.

If I Sleep Right Now…

Wake Up AtSleepQuality
5:57 AM9h 0mOptimal (9h)
4:27 AM7h 30mGreat (7.5h)
2:57 AM6h 0mGood (6h)
1:27 AM4h 30mMinimum (4.5h)
11:57 PM3h 0mPoor (3h)

Sleep Recommendations by Age

Age GroupRecommended Sleep
Newborn (0–3 mo)14–17 hours
Infant (4–11 mo)12–15 hours
Toddler (1–2 yr)11–14 hours
Preschool (3–5 yr)10–13 hours
School age (6–13)9–11 hours
Teen (14–17)8–10 hours
Young adult (18–25)7–9 hours
Adult (26–64)7–9 hours
Older adult (65+)7–8 hours