Baby Tools

Wake Window Calculator

Find out how long your baby should stay awake between naps based on their age. Getting wake windows right can help with settling and sleep.

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A wake window is the amount of time your baby can comfortably stay awake between sleeps. It includes everything — feeding, nappy changes, play, cuddles — from the moment they wake up to when they fall asleep again.

Why do wake windows matter?

Getting the timing right can make a real difference to how easily your baby settles. Put them down too early and they may not be tired enough to sleep. Wait too long and they become overtired — which, counterintuitively, makes it harder for them to fall asleep and stay asleep.

Overtired babies often fight sleep, wake more frequently, and have shorter naps. Watching the clock alongside your baby's sleepy cues can help you find that sweet spot.

Sleepy cues to watch for

Every baby is different, but common signs that your baby is ready for sleep include:

Yawning
Rubbing eyes or ears
Looking away or "zoning out"
Becoming fussy or grizzly
Jerky movements or clenched fists
Rooting or wanting to feed for comfort

A guide, not a rule

Wake windows are averages — your baby hasn't read the guidelines! Some babies need slightly more or less awake time. Use these as a starting point and adjust based on what you observe. If your baby consistently fights a nap, they might need a longer wake window. If they're melting down before nap time, try putting them down earlier.

The first wake window of the day is usually the shortest. Wake windows typically get longer as the day goes on.

Baby's age

Months

Extra weeks (0-3)

This calculator covers newborn to 24 months.

When did your baby last wake up? (optional)

We'll suggest when the next nap should start.

Ideal Wake Window

Typical Day Structure

Tips for this age

Quick Reference by Age

Age	Wake Window	Naps
0–6 weeks	45–60 mins	4–8 naps
6–12 weeks	1–1.5 hours	4–5 naps
3–4 months	1.25–2 hours	3–4 naps
5–6 months	2–2.5 hours	3 naps
7–9 months	2.5–3.5 hours	2–3 naps
10–12 months	3–4 hours	2 naps
13–18 months	4–5.5 hours	1–2 naps
18–24 months	5–6 hours	1 nap

Remember These are general guidelines based on typical baby sleep patterns. Every baby is different — some need more sleep, some less. Watch your baby's sleepy cues alongside the clock, and don't stress if your little one doesn't match the "average" exactly. If you have concerns about your baby's sleep, speak to your health visitor.