Wake windows by age: a simple chart for newborns to toddlers

A "wake window" is the amount of time your baby can happily stay awake between sleeps before they get overtired. Nail the timing and naps get easier; miss it and you get the fighting, the crying, and the 20-minute cat nap.

Wake window chart by age

These are typical ranges — every baby is different, so treat them as a starting point and watch your own baby's cues.

• Newborn (0–6 weeks): 35–60 minutes
• 7–12 weeks: 60–90 minutes
• 3–4 months: 75–120 minutes
• 5–6 months: 2–2.5 hours
• 7–9 months: 2.5–3 hours
• 10–12 months: 3–4 hours
• 13–18 months: 4–6 hours (usually one nap)

How to read your baby's tired cues

Timing is only half of it — the other half is watching for early tired signs and getting your baby down before they're overtired:

• Slowing down, staring off, losing interest in play
• Rubbing eyes, pulling ears, yawning
• Fussing, arching, turning away from stimulation

Red-zone signs (already overtired) are crying, back-arching and frantic movement. If you see those, the window closed a bit too late — shorten it slightly next time.

Why overtired babies sleep worse

It feels backwards, but a baby kept awake too long produces more cortisol and adrenaline, which makes it harder to fall asleep and stay asleep. That's the classic short-nap, frequent-waking spiral. Catching the window keeps the whole day calmer.

Let the app do the math

Tracking every nap and back-calculating the next window at 2pm on no sleep is exactly the kind of thing you shouldn't have to do in your head. Ziggy shows the next age-appropriate wake window — or a custom schedule you set — and reminds you when it ends, so you get a heads-up before the meltdown instead of after.