Wake Windows by Age: The Complete Chart (0–24 Months)
A wake window is simply how long your baby can happily stay awake before they need sleep again. Get it roughly right and naps get easier. Here's the whole first two years in one chart — plus the sleepy cues that matter more than the clock.
Newborns can only manage 30–60 minutes awake. By their first birthday, most babies handle 3–4 hours. Everything in between is a gradual stretch, and the chart below shows the typical ranges month by month.
The wake window chart by age
| Age | Wake window | Naps per day | Total sleep per 24h | What it looks like |
|---|---|---|---|---|
| 0–4 weeks | 30–60 minutes | 4–6+ (often more in the first fortnight) | 14–17 hours | Feed, cuddle, back to sleep. Almost no "play" yet. |
| 1–2 months | 45 minutes–1.5 hours | 4–5 | 14–17 hours | First smiles appear inside these short windows. |
| 3 months | 1.25–2 hours | 3–4 | 14–17 hours | Windows start to feel predictable for the first time. |
| 4 months | 1.5–2.5 hours | 3–4 | 12–16 hours (including naps) | Sleep matures — this is the 4-month sleep regression change; windows jump. |
| 5 months | 2–2.5 hours | 3 | 12–16 hours (including naps) | Three solid naps is the classic pattern now. |
| 6 months | 2–3 hours | 2–3 | 12–16 hours (including naps) | The third nap starts getting refused — some babies start refusing it late in this stage; most drop it at 7–9 months. |
| 7–8 months | 2.5–3.5 hours | 2–3 | 12–16 hours (including naps) | Two naps settle in; first window is usually the shortest. |
| 9–10 months | 3–4 hours | 2 | 12–16 hours (including naps) | Crawling and pulling up burn real energy. |
| 11–12 months | 3–4 hours | 2 | 12–16 hours (including naps) | Fake-outs begin: a refused second nap isn't always a drop. |
| 13–15 months | 3–4.5 hours | 1–2 | 11–14 hours (including naps) | Two naps is still normal; one-nap days start alternating in. |
| 16–18 months | 4–6 hours | 1 | 11–14 hours (including naps) | The one-nap transition settles — often bumpy for a few weeks. |
| 19–24 months | 5–6 hours | 1 | 11–14 hours (including naps) | One long midday nap. On one nap the morning window is usually the longer one (about 5–6 hours before the nap, 4–5 hours after it) — the reverse of the baby pattern. |
An honesty note: no medical body publishes an official wake-window chart — not the AAP, the CDC or the NHS. The windows above are the ranges pediatric sleep practitioners use in practice; the total-sleep column is the evidence-based guidance (AASM consensus, endorsed by the AAP). Treat the windows as a starting neighbourhood, not a prescription.
The AASM gives no set range under 4 months because newborn sleep is so variable — the 14–17 hours shown for the youngest rows is the National Sleep Foundation range that the CDC carries.
Keep this chart on your fridge
The free Wake Window Cheat Sheet puts the 0–6 month chart and the sleepy cues on one printable page.
Get the free cheat sheet →Three things the chart doesn't tell you
1. The first window is usually the shortest
Most babies handle their shortest stretch right after morning wake-up, and their longest right before bed. A 7-month-old might do 2.5 hours first thing, then 3.5 hours before bedtime — and both are normal. If mornings are falling apart, shorten the first window before you change anything else. As a rule of thumb, plan the first window at the bottom of your baby’s range and the last window about 20% longer than the middle windows. (Toddlers on one nap are the exception — by 19–24 months the morning window is usually the longer one.)
2. Sleepy cues beat the clock
The chart gives you the neighbourhood; your baby gives you the address. Watch for the early cues — these mean "start the wind-down now":
- Staring off into the distance, losing interest in toys
- Quieter, slower movements
- Turning the face away from play, red or pink eyebrows
Late cues mean you are already at the edge of the window: yawning and rubbing eyes usually mean act immediately. After that come fussing, arching, ear-pulling, and the wired "second wind" where an overtired baby suddenly seems full of energy. What is happening: awake time builds sleep pressure, and past the window the body releases cortisol and adrenaline to fight the tiredness — which is why an overtired baby looks wired instead of sleepy. An overtired baby often takes longer to settle and wakes sooner — which is exactly why the early cues are worth learning.
This flips with age. Under about 4 months, cues beat the clock — newborn cues are easy to miss, so use the window as a backstop. After 4–5 months, many babies hide tiredness behind play and distraction, so let the clock lead and use cues to fine-tune.
3. Every baby has a range, not a number
Two babies the same age can differ by 45 minutes and both be perfectly typical. For premature babies, use adjusted (corrected) age: subtract the weeks your baby was early from their age today, and read the chart at that age. Example: a baby who is 4 months old but was born 8 weeks early tracks closer to a 2-month-old — use the 1–2 month row. Adjusted age is the right frame for sleep through the first two years; ask your pediatrician if you are unsure. Growth spurts, illness, new skills (hello, rolling at 3 a.m.) and travel all shrink windows temporarily. None of that means you're doing it wrong.
What to do when your baby doesn't match the chart
Adjust in 15-minute steps and give each change three days before judging it:
- Hard to settle, short naps, meltdowns before the window ends? Shorten the window by 15 minutes.
- Happy at the end of the window, but naps are short and baby wakes cheerful? Stretch it by 15 minutes — some babies need more awake time to sleep deeply.
- Everything was fine and suddenly isn't? Check for the usual suspects first: a new skill, teeth, illness, or a nap transition on the horizon.
Too long or too short? How to tell
The same problem — short naps, hard settling — can mean the window is too long OR too short. The behaviour around sleep tells you which:
| Signs | What it means | The fix |
|---|---|---|
| Fussing, arching, ear-pulling, jerky movements; a wired "second wind"; takes longer to settle and wakes sooner | Too long (overtired) | Shorten the window by 15 minutes, and bring bedtime earlier tonight. |
| Plays or chats happily in the crib for 20+ minutes; takes a long time to fall asleep without crying or distress; short nap, then wakes cheerful and refreshed; refuses the nap without seeming tired; false starts (wakes 30–45 minutes after bedtime); a long, happy awake stretch in the middle of the night | Too short (undertired) | Stretch the window before that sleep by 15 minutes, and give it three days. |
A real day, as an example
For a 5-month-old on three naps with roughly 2–2.5 hour windows, a day might look like: wake 7:00 → nap 9:15–10:45 → nap 1:00–2:30 → nap 4:45–5:30 → bed 8:00. The windows run about 2h15, with the last one before bed a touch longer at 2h30. Your times will differ — the shape is what matters: short morning window, longer ones later, a brief catnap guarding bedtime.
That day adds up to about 3¾ hours of daytime sleep and an 11-hour night — roughly 14¾ hours in 24, inside the 12–16 hour range for 4–12 months.
For a 9-month-old on two naps: wake 7:00 → nap 10:00–11:30 → nap 2:30–4:00 → bed 7:30 — windows of 3 hours, 3 hours and 3.5 hours, again with the last one longest.
Want the full day laid out month by month — wake-ups, naps and bedtime for every age? See Baby Sleep Schedule by Age.
When sleep is not a chart problem
Most sleep puzzles are timing puzzles. Call your pediatrician if:
- Your baby consistently sleeps well outside the total-sleep range for their age (14–17 hours under 3 months; 12–16 hours at 4–12 months; 11–14 hours at 1–2 years)
- Your newborn is very hard to rouse for feeds, keeps falling asleep mid-feed, or is not gaining weight as expected
- Wake windows are still under about 20 minutes past the first month
- You hear regular loud snoring or pauses in breathing, or see thrashing in sleep
- You have adjusted windows consistently for about two weeks and nothing is improving
Questions parents ask us
What is a wake window?
A wake window is the stretch of time a baby can comfortably stay awake between sleeps — from the moment they wake up to the moment they fall asleep again, including feeding and winding down. Babies who are put down inside their window usually settle faster and sleep longer than overtired babies.
What if my baby doesn’t follow the chart?
That’s normal. The chart shows typical ranges, not rules. Use your baby’s sleepy cues as the final word, and adjust the window by 15 minutes at a time: if your baby is happy and settles easily, the window fits; if they melt down before it ends, shorten it.
Is the first wake window really the shortest?
For most babies, yes. Sleep pressure builds across the day, but the first window of the morning is usually the shortest and the last window before bed the longest. It’s a tendency, not a law — some babies are the opposite.
How do I know if my baby is overtired?
Overtired babies often get a strange second wind — wired, giggly, almost hyper — then crash into tears. Also watch for arching, ear-pulling, jerky movements and fighting sleep despite being exhausted. Yawning and rubbing eyes usually mean you are already at the edge; the earlier cues — staring, quieter play, turning the face away — are the ones to act on.
How do I know if my baby’s wake window is too short?
Your baby plays or chats happily in the crib for 20 minutes or more, takes a long time to fall asleep without seeming upset, or takes a short nap and wakes up cheerful. That usually means not enough sleep pressure yet — stretch that window by 15 minutes for three days.
How much total sleep does my baby need?
Per the AASM guidance the AAP endorses: 14–17 hours per 24 hours from birth to 3 months, 12–16 hours (including naps) at 4–12 months, and 11–14 hours (including naps) at 1–2 years. Consistently sleeping well outside your baby’s range is a reason to raise it with your pediatrician.
Should I wake my baby from a nap?
Usually let them sleep — with two exceptions: in the newborn weeks, wake for feeds if your pediatrician has advised it; and cap a late-afternoon nap that would push bedtime too late (many families wake from the last nap by about 4:30 p.m. to protect a ~7 p.m. bedtime). Protecting bedtime beats finishing a nap.
Do wake windows apply at night?
No. Wake windows structure the daytime. Overnight, babies cycle between sleep stretches — a night feed does not restart a wake window, and you do not need to keep your baby awake for a set time at night.
Want the whole plan, not just the chart?
Wake Windows Made Simple is the full 44-page kit: age-by-age charts up to 24 months, sample schedules for every stage, nap-transition playbooks and the troubleshooting pages for the hard weeks — printable, fridge-friendly, and written for 2 a.m. brains.
$5 at founding launch (regularly $30)
See Wake Windows Made Simple →Sources & further reading: AAP HealthyChildren — A Parent's Guide to Safe Sleep · KidsHealth (Nemours) — All About Sleep · Sleep Foundation — Newborn Wake Windows · CDC — About Sleep · HealthyChildren.org (AAP) — Healthy Sleep Habits: How Many Hours Does Your Child Need?