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Baby wake window calculator
How long should my baby be awake between naps?
Wake windows — the time a baby stays comfortably awake between sleeps — run about 30 to 60 minutes for a newborn, 60 to 90 minutes at 1 to 3 months, 75 to 120 minutes at 3 to 4 months, 2 to 3 hours at 5 to 7 months, 2.5 to 3.5 hours at 7 to 10 months, 3 to 4 hours at 11 to 14 months, and 4 to 6 hours from 14 to 24 months. These are published ranges rather than targets, and a baby who wakes happy and settles easily is in their own right window.
Work out your baby's window
At 1–3 months, babies are commonly awake for
1h – 1h 30m
Typically 4–6 naps a day at this age.
Add the time your baby woke to see when the next nap is likely to land.
Watch your baby, not the clock. Sleepy cues — staring off, ear-pulling, jerky movements — beat any chart, and a baby who wakes happy and settles easily is in their own right window.
Wake windows by age chart
| Age | Wake window | Naps per day |
|---|---|---|
| 0–1 month | 30m – 1h | 4–8 (often irregular) |
| 1–3 months | 1h – 1h 30m | 4–6 |
| 3–4 months | 1h 15m – 2h | 3–5 |
| 5–7 months | 2h – 3h | 3 |
| 7–10 months | 2h 30m – 3h 30m | 2–3 |
| 11–14 months | 3h – 4h | 1–2 |
| 14–24 months | 4h – 6h | 1 |
How to use wake windows without watching the clock
A wake window is a description, not a prescription. The chart above tells you the range most babies fall into, which is genuinely useful when you are trying to work out whether a 40-minute-awake newborn is unusual (they are not). It cannot tell you what your particular baby needs today.
The practical approach is to use the range as a rough window and your baby's cues as the actual signal. Start watching for tired signs at the lower end of the band — staring into space, ear-pulling, jerky arm movements, a first yawn — and aim to start winding down before the upper end.
Why the same baby has different windows through the day
The first wake window of the morning is usually the shortest, and the last one before bedtime the longest. A baby who napped badly will often need a shorter window afterwards. Growth spurts, teething, illness and travel all compress windows temporarily. None of that means the chart is wrong or your baby is behind.
Wake window questions parents ask
- What is a wake window?
- A wake window is the length of time a baby stays comfortably awake between sleeps, measured from the moment they wake up to the moment they fall asleep again. It includes feeding, nappy changes and play — not just the time spent actively awake and alert.
- What happens if a baby is awake too long?
- A baby kept awake past their window often becomes overtired, which raises stress hormones and paradoxically makes falling asleep harder. Common signs are frantic crying, arching, and fighting sleep despite obvious tiredness. Shortening the next wake window usually helps settle the pattern.
- Should I wake my baby to keep to a wake window?
- Wake windows describe how long babies typically stay awake; they are not a schedule to enforce. Newborns in particular should be fed on demand. If your baby is not regaining birth weight, or your health professional has advised waking for feeds, follow that advice over any chart.
- Do wake windows apply to premature babies?
- Use corrected age rather than chronological age for a baby born before 37 weeks. A baby born eight weeks early at 20 weeks old has a corrected age of 12 weeks, so the 1–3 month band fits better than the 5–7 month one.
Where these numbers come from
- Cleveland Clinic — Wake window ranges by age.
- Raising Children Network — Australian government-funded guidance on nappies, wees and poos in babies.
- Red Nose Australia — Safe sleep guidance and newborn hydration signs.
Stop doing this maths in your head
BubSync logs every nap as it happens and learns your baby's own rhythm, so the next wake window is waiting on your home screen instead of being worked out from a chart. Everyone caring for your baby sees the same timeline.