Wake Window Calculator
Enter your baby age to see the typical wake window and naps per day.
| Age | Wake window | Naps |
|---|---|---|
| 0 to 1 mo | 45 to 60 min | 4 to 6 |
| 2 to 3 mo | 1.25 to 1.5 hr | 3 to 5 |
| 4 to 5 mo | 1.5 to 2 hr | 3 to 4 |
| 6 to 7 mo | 2 to 2.5 hr | 2 to 3 |
| 8 to 9 mo | 2.5 to 3 hr | 2 to 3 |
| 10 to 12 mo | 3 to 4 hr | 2 |
| 13 to 18 mo | 4 to 5 hr | 1 to 2 |
Why wake windows help
A wake window is the stretch a baby can comfortably stay awake before tiredness turns to overtired fussiness. Keep the window short enough and naps come easier. As the brain matures, the window stretches, so the schedule changes every few weeks.
Reading your baby
The numbers are a guide. Watch for early tired signs, like yawning, staring off, or rubbing eyes, and start the wind-down then. A baby who fights sleep or wakes early is often overtired, so shorten the next window.
Building the day
Work backward from naps to set the wake window, and keep the last stretch before bed a little longer than the rest. Keep the routine consistent, but expect growth spurts, teething, and travel to shift it for a few days.
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Questions about this calculator
What is a wake window?
A wake window is how long a baby can comfortably stay awake between sleeps. It starts short for newborns and stretches as they grow.
What are wake windows at 6 months?
Most 6-month-olds handle about 2 to 2.5 hours awake between sleeps, with two to three naps a day.
How long should a newborn be awake?
Newborns can usually manage only 45 to 60 minutes awake before needing sleep again, including feeding time.
Do wake windows change with naps?
Yes. Shorter windows suit babies taking more naps, and windows stretch as naps drop to two and then one.
What if my baby fights sleep?
Fighting sleep often means overtired, not undertired. Shorten the next wake window and start the wind-down earlier.
Do all babies follow the same schedule?
No. These ranges are averages. Temperament, feeding, and growth spurts all shift the timing, so treat the numbers as a starting point.