Wake windows by age: the chart, and how to stop needing it
Updated 24 August 2026 · by Josh, Pipkin's developer
A wake window is the stretch your baby can comfortably stay awake between sleeps: roughly 35–60 minutes for a newborn, stretching to 3–4 hours by their first birthday. Time it right and naps come easily; miss it and you get an overtired fight. Below is the chart, and then how to find your baby's real numbers.
Wake windows by age chart
The window starts the moment your baby wakes, not after the feed, and ends when they're asleep again. The first window of the day is usually the shortest, the one before bedtime the longest.
| Age | Typical wake window | Naps per day |
|---|---|---|
| 0–4 weeks | 35–60 minutes | 4–6+ (irregular) |
| 1–2 months | 45–75 minutes | 4–5 |
| 2–3 months | 60–90 minutes | 4–5 |
| 3–4 months | 75–120 minutes | 3–4 |
| 4–5 months | 90 minutes–2.5 hours | 3–4 |
| 5–6 months | 2–3 hours | 3 |
| 7–9 months | 2.5–3.5 hours | 2–3 |
| 10–12 months | 3–4 hours | 2 |
| 12–18 months | 4–6 hours | 1–2 |
| 18–24 months | 5–6 hours | 1 |
Treat these as population ranges. Plenty of perfectly healthy babies run 30 minutes longer or shorter than the chart at every age. That is exactly why the chart alone will eventually let you down.
How to use wake windows (without watching the clock all day)
- Start counting at wake-up. The window includes the feed, the change, and the play: everything until the next sleep.
- Aim for the middle of the range, then adjust: fighting the nap usually means the window was too short; a 20-minute crash-nap and a grizzly wake-up usually means too long.
- Watch the baby and the clock. Sleep cues (a glazed stare, ear-pulling, going quiet) matter more than the timer, but by 4–5 months cues get subtle and the clock earns its keep.
- Expect the windows to stretch in steps, usually right around nap transitions and developmental leaps, with plateaus in between.
In Pipkin
Pipkin measures your baby's actual wake windows from the sleeps you log, tracking first-of-day, midday and pre-bedtime separately, then blends them with the age norms above into a next-nap prediction with the reasoning shown: "Awake 1h 40m of a typical 1h 55m. Nap likely around 12:32." When your baby's real midday window runs past the chart's ceiling, Pipkin follows your baby.
Signs the window is wrong
Too long (overtired): fighting sleep while clearly exhausted, short "junk" naps, more night wakings, early morning wake-ups. Overtiredness is the counterintuitive one: a baby kept awake longer often sleeps worse, because stress hormones make settling harder.
Too short (undertired): happily chatting in the cot for 20+ minutes, split nights (long wide-awake stretches at 2am), naps that won't start at all. From around 4–6 months, a too-generous daytime total starts stealing from the night.
When wake windows stop being the answer
Around 12–18 months the model changes: one good nap plus a stable bedtime matters more than counting hours awake. And during regressions, the 4-month change especially, windows wobble for a week or two before settling into a new pattern. That's normal. Re-anchor on the new numbers once they settle.
Quick answers
What is a wake window?
A wake window is the time a baby can comfortably stay awake between sleeps, counted from the moment they wake to the moment they fall asleep again. It includes feeding, changing and play. Newborn wake windows are around 35–60 minutes; by 12 months they stretch to 3–4 hours.
Do wake windows include feeding time?
Yes. The wake window starts when your baby wakes and ends when they fall asleep again, so feeds, changes and play all count toward it.
What happens if my baby stays awake past their wake window?
Most babies get overtired: cortisol rises, settling gets harder, naps shorten, and night sleep often fragments. If a nap was missed, aim for an earlier next sleep rather than a much longer one.
A note on medical advice: this guide is general information, not medical advice, and Pipkin is a tracking tool, not a medical device. Every baby is different. For anything that worries you, talk to your paediatrician, health visitor or midwife.
