Wake windows by age
A complete chart from newborn to preschooler. Plus how to read overtired vs under-tired signals.
Sleep · Reference
TL;DR
A wake window is the time between waking from sleep and falling asleep again. Newborns can only stay awake 45 to 60 minutes. Toddlers can manage 5 to 6 hours. Use this chart as a starting point. Watch for sleepy cues (yawning, eye rubbing, looking away) and adjust by 10 to 15 minutes either way.
The complete wake windows chart
| Age | Wake window | Naps/day | Total day sleep | Total night sleep |
|---|---|---|---|---|
| Newborn (0–1 mo) | 45–60 min | 4–6 | 7–9 hrs | 8–9 hrs (broken) |
| 1 month | 60–90 min | 4–5 | 6–8 hrs | 9–10 hrs |
| 2 months | 75–105 min | 4 | 5–7 hrs | 10–11 hrs |
| 3 months | 1.5–1.75 hrs | 3–4 | 4–5 hrs | 10–11 hrs |
| 4 months | 1.75–2 hrs | 3–4 | 3.5–4.5 hrs | 10–11 hrs |
| 5 months | 2–2.25 hrs | 3 | 3–4 hrs | 11 hrs |
| 6 months | 2.25–2.75 hrs | 2–3 | 2.5–3.5 hrs | 11 hrs |
| 7 months | 2.75–3.25 hrs | 2 | 2.5–3 hrs | 11 hrs |
| 9 months | 3–3.5 hrs | 2 | 2.5 hrs | 11 hrs |
| 12 months | 3.5–4 hrs | 1–2 | 2–2.5 hrs | 11 hrs |
| 13–15 months | 4–4.5 hrs | 1 | 1.5–2.5 hrs | 11 hrs |
| 15–18 months | 4.5–5 hrs | 1 | 1.5–2 hrs | 11 hrs |
| 18–24 months | 5–6 hrs | 1 | 1.5–2 hrs | 11 hrs |
| 2–3 years | 5.5–6.5 hrs | 0–1 | 1–1.5 hrs | 11–12 hrs |
| 3–5 years | 6–12 hrs | 0–1 | 0–1 hr | 10–13 hrs |
These are averages from established pediatric sleep guidelines. Some babies naturally need slightly shorter or longer windows.
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Try the calculatorHow wake windows work in practice
The first wake window of the morning is usually the shortest. The wake window before bed is usually the longest. So a 6-month-old might do this:
- Wake 7:00 AM
- Nap 1: 9:30 AM (2.5 hr wake window)
- Nap 2: 12:30 PM (2.5 hr wake window)
- Nap 3: 3:30 PM (2.75 hr wake window)
- Bedtime: 7:00 PM (2.75–3 hr wake window)
Signs of overtired
Overtired babies fall asleep harder, sleep shorter, wake more often during the night, and often wake unusually early in the morning. The signs:
- Crying harder than usual at bedtime.
- Fighting sleep when they're usually agreeable.
- Naps suddenly under 30 minutes.
- Multiple night wakings (more than usual).
- Early-morning wake at 4:30 to 5:30 AM.
If you see these patterns, shorten wake windows by 10 to 15 minutes for a few days.
Signs of under-tired
The opposite. Baby goes down without protest but takes 20 to 30 minutes to actually fall asleep, then takes a short nap or skips it entirely.
- Long wind-down at sleep.
- Talking, kicking, playing in the crib.
- Skipping naps that "should" still be happening.
- Waking happy after 20 to 30-minute naps.
If you see these, lengthen wake windows by 15 minutes over a few days.
Sleepy cues by age
Newborn cues
Yawning, jerky movements, looking away, zoning out. Newborns can go from happy to overtired in 5 minutes. Start the wind-down at the first yawn.
3–6 month cues
Eye rubbing, ear pulling, decreased eye contact, sudden fussiness. Once they cross into crying, you've usually missed the window.
6–12 month cues
Slowing down, getting quiet, looking glassy-eyed, seeking comfort items. Hyperactivity right before nap usually means already overtired.
Toddler cues
Whining, clinginess, big emotions over small things, unusual silence. Toddlers often resist nap before showing it physically. Trust the routine, not the protest.
When the chart doesn't match
Some babies naturally need shorter or longer windows than average. If your baby falls asleep within 15 minutes of going down and wakes up happy, the schedule is working. Even if it differs from this chart.
Watch the baby, not the clock.
Common nap transitions
- 4 to 3 naps: ~4 months
- 3 to 2 naps: ~7–9 months
- 2 to 1 nap: ~14–18 months
- Drop the last nap: ~3–5 years
Signs you're transitioning: baby starts fighting one of the naps, the last nap pushes bedtime too late, or night sleep starts to fragment after a previously stable pattern.