Total Sleep
14 hrs
Bedtime
8:00 PM
Naps
2
Recommended Total Sleep
14 hrs
11h night + 3h naps
Wake Window
200 min
Nap Length
90 min
Bedtime
8:00 PM
Inputs
Result
Total sleep = 14h (11h night + 3h naps). Awake = 24 - 14 = 10h. Wake windows = 10 / (2+1) = 3.3h (200 min). Bedtime = 7 + 24 - 11 = 8:00 PM.
Inputs
Result
Total sleep = 13h (11.5h night + 1.5h nap). Awake = 24 - 13 = 11h. Wake windows = 11 / (1+1) = 5.5h (330 min). Bedtime = 6.5 + 24 - 11.5 = 7:00 PM.
Newborns need 14-17 hours of sleep, infants 12-16 hours, and toddlers 11-14 hours per 24-hour period. Sleep gradually consolidates into longer nighttime stretches with fewer daytime naps as babies age.
| Age | Total Sleep | Night Sleep | Nap Hours | Naps |
|---|---|---|---|---|
| Newborn | 16h | 9h | 7h | 4-5 |
| 4-6 months | 14.5h | 10h | 4.5h | 3 |
| 6-12 months | 14h | 11h | 3h | 2 |
| 12-18 months | 13h | 11.5h | 1.5h | 1 |
| 2-3 years | 12h | 11h | 1h | 1 |
Wake windows are the periods of awake time between sleep sessions. They increase with age from 45-60 minutes for newborns to 5-6 hours for toddlers. Following appropriate wake windows prevents overtiredness and helps babies fall asleep more easily.
| Age | Min Wake Window | Max Wake Window | Before Bedtime |
|---|---|---|---|
| 0-3 months | 45 min | 90 min | 60-90 min |
| 4-6 months | 1.5h | 2.5h | 2-2.5h |
| 6-9 months | 2h | 3h | 2.5-3h |
| 9-12 months | 2.5h | 3.5h | 3-3.5h |
| 12-18 months | 3h | 4h | 4-4.5h |
Most babies do best with a bedtime between 6:30-8:00 PM. The ideal bedtime depends on their last nap ending time and age-appropriate wake window. An overtired baby paradoxically has more trouble sleeping, so earlier bedtimes often result in longer sleep.
Most babies transition from 2 naps to 1 nap between 13-18 months. Signs include fighting the second nap, taking 15+ minutes to fall asleep for naps, or the second nap pushing bedtime too late. The transition typically takes 2-4 weeks.
Divide total awake hours by the number of wake windows (naps + 1). For a 6-month-old awake 10 hours with 2 naps: 10 / (2+1) = 3.3 hours per wake window. The last wake window before bed is usually the longest.
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Last Updated: Mar 25, 2026
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