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Wake windows by age
How long should your baby be awake between naps? Enter their age for a typical wake-window range, nap count, and total sleep — and add when they last woke to see when the next nap may be due. These are planning estimates; your baby's cues come first.
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4–6 months
1.5 hours – 2.5 hours
3 naps
13–15 hours
Most babies settle into a predictable 3-nap rhythm. The last wake window of the day is usually the longest.
For every sleep, place baby on their back on a firm, flat surface with no loose bedding.
Sources and assumptions
Wake-window bands are editorial planning estimates, not validated pediatric cutoffs. The AAP resources below discuss infant sleep and safe sleep; they do not prescribe this calculator’s exact minute ranges. Follow your baby’s cues and feeding needs, and use a safe sleep space for every sleep.
Prepared by the Milk & Minutes Editorial Team. This calculator has not been independently reviewed by a clinician. Editorial standards.
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Wake windows chart by age
Typical wake windows, naps per day, and total sleep by age. Ranges are starting points — follow your baby's cues.
| Age | Wake window | Naps per day | Total sleep (24h) |
|---|---|---|---|
| Newborn (0–4 weeks) | 35 min – 1 hour | 4–6+ naps | 15–18 hours |
| 1–2 months | 45 min – 1.3 hours | 4–5 naps | 14–17 hours |
| 2–3 months | 1 hour – 1.5 hours | 4–5 naps | 14–16 hours |
| 3–4 months | 1.3 hours – 2 hours | 3–4 naps | 14–16 hours |
| 4–6 months | 1.5 hours – 2.5 hours | 3 naps | 13–15 hours |
| 6–9 months | 2 hours – 3 hours | 2–3 naps | 13–15 hours |
| 9–12 months | 2.5 hours – 3.5 hours | 2 naps | 12–15 hours |
| 12–18 months | 3 hours – 5 hours | 1–2 naps | 12–14 hours |
| 18–24+ months | 4 hours – 6 hours | 1 nap | 11–14 hours |
Common questions
What is a wake window?
A wake window is the time your baby can comfortably stay awake between sleeps — measured from the moment they wake up to the moment they fall back asleep. Get it right and naps come easily; too long and overtiredness makes everything harder.
Should I follow wake windows or sleepy cues?
Both. Wake windows tell you when to start watching; sleepy cues (red eyebrows, glazed stare, ear pulling, fussiness) tell you to act. For newborns especially, cues beat the clock.
Why does my baby fight sleep at the end of a wake window?
Two common causes: the window is too short (not enough sleep pressure yet) or too long (overtired, with cortisol working against you). Try adjusting in 10–15 minute steps and hold each change for a few days.
When do babies drop to two naps? To one nap?
Most babies move from 3 naps to 2 around 6–9 months, and from 2 naps to 1 between 13–18 months. Each transition takes a couple of bumpy weeks — lean on earlier bedtimes while it settles.
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This tool provides general educational guidance based on published guidelines. It is not medical advice. Always follow the recommendations of your pediatrician, lactation consultant, or healthcare provider — especially for premature babies, low-weight babies, or babies with health conditions.