Baby wake windows by age: what the ranges really mean

Parents often hear that a baby should be awake “no more than 90 minutes” or “about two hours”. Those numbers are wake windows: the time between waking up and the next sleep.

Typical ranges

The ranges below are where two widely used baby sleep guides overlap. They are commonly reported figures, not medical guidelines, and the sources themselves disagree in places.

Age	Wake window
Newborn (0–1 month)	30–60 min
1–2 months	45–90 min
2–3 months	1–1.5 h
3–5 months	1.5–2.5 h
5–7 months	2–3 h
7–10 months	2.5–3.5 h
10–12 months	3–4 h
12–18 months	3–4 h
18–24 months	4–6 h

Why the numbers differ

Babies are not clocks. The same baby may handle a longer window after a good night and a shorter one after a short nap. Guides also draw their age bands in different places, which is why you may see another chart with slightly different figures.

Use cues as well as the clock

Yawning, rubbing eyes, staring into space, going quiet or fussing are signs that sleep is due. If you see them before the window opens, start winding down. If your baby is happy and alert at the end of the window, a few extra minutes is normal.

Total sleep

Babies from birth to 3 months commonly sleep 14–17 hours in 24 hours; from 4 to 12 months, 12–16 hours; and from 1 to 2 years, 11–14 hours, including naps (NSF, AASM).

This article does not cover sleep training, feeding schedules or medication. If you are worried about your baby’s sleep, talk to your pediatrician.