Free parenting tool
Wake windows by age calculator
Slide to your baby's age for typical wake windows, nap count, and total sleep — then open the matching full schedule.
4 mo
Age band
4 months
Wake window
1.5–2.5 hours
Typical naps
3–4
Total sleep / day
~14.5 hrs
Sleep cycles mature — timing mistakes look like “regression”.
Ranges are educational averages, not medical advice. Premature babies: ask your pediatrician about adjusted age.
Quick wake-window chart
| Age | Wake window | Naps |
|---|---|---|
| 0–1 mo | 35–60 min | 4–6+ |
| 2 mo | 60–90 min | 4–5 |
| 3 mo | 75–120 min | 3–4 |
| 4 mo | 1.5–2.5 hr | 3–4 |
| 5–6 mo | 2–3 hr | 2–3 |
| 8–10 mo | 2.5–4 hr | 2 |
| 12 mo | 3–5 hr | 1–2 |
| 18–24 mo | 5–7 hr | 1 / rest |