Evidence-based guide
Wake Windows by Age: How Long Can Your Baby Stay Awake?
Wake windows help you find the sweet spot between undertired and overtired. Here are the evidence-based ranges for every age, from newborn to toddler.
What are wake windows?
A wake window is the amount of time your baby can comfortably stay awake between sleeps. Too short and they are not tired enough to fall asleep easily. Too long and they become overtired, which makes settling harder and often leads to shorter naps and more night waking.
Wake windows are ranges, not exact times. Every baby is different. Some need the shorter end of the range, others push closer to the upper limit. The table below gives you a starting point, but your baby's cues should always guide your decisions alongside the clock.
Think of wake windows as one tool in the toolkit, not the whole toolkit. They work best when combined with reading your baby's sleepy cues and keeping a consistent bedtime.
Wake windows by age
| Age | Wake Window | Naps | Total Day Sleep |
|---|---|---|---|
| 0 to 8 weeks | 45 min to 1 hr | 4 to 6 | 5 to 8 hrs |
| 2 to 3 months | 1 to 1.5 hrs | 4 to 5 | 4 to 6 hrs |
| 3 to 4 months | 1.25 to 2 hrs | 3 to 4 | 3.5 to 5 hrs |
| 4 to 6 months | 1.5 to 2.5 hrs | 3 | 3 to 4 hrs |
| 6 to 9 months | 2 to 3 hrs | 2 to 3 | 2.5 to 3.5 hrs |
| 9 to 12 months | 2.5 to 3.5 hrs | 2 | 2 to 3 hrs |
| 12 to 18 months | 3 to 4 hrs | 1 to 2 | 2 to 3 hrs |
| 18 months+ | 4 to 6 hrs | 1 | 1.5 to 2.5 hrs |
These are general ranges. Your baby may fall at the shorter or longer end depending on their temperament and development.
Signs your baby is ready to sleep
Wake windows tell you roughly when to start watching for cues. These cues tell you when to act.
Yawning
The classic sign. If you see a second yawn, the window is closing fast.
Eye rubbing
Rubbing eyes or ears often means your baby is overtired already.
Staring into space
A glazed, distant look. They are starting to zone out.
Fussiness
Grizzling or whinging that is not hunger, nappy, or boredom related.
Jerky movements
Pulling at their hair or flailing. A late sign, often overtired.
Turning away
Losing interest in play or people. They have had enough stimulation.
Try our free wake window calculator
Enter your baby's age and wake time, and we will show you suggested nap times and bedtime for the day. No sign-up required.
Open the calculatorCommon questions about wake windows
Are wake windows accurate for every baby?
Wake windows are ranges, not rules. They give you a starting point, but your baby's individual cues matter more than the clock. Some babies need the lower end of the range, others push to the upper end. Use the table as a guide and adjust based on how your baby responds.
What if my baby won't sleep at the end of a wake window?
If your baby seems wide awake when the wake window suggests they should be tired, they may need a slightly longer window. Alternatively, check for overstimulation. Sometimes babies fight sleep because they are overtired, not undertired. Look at what happened in the 30 minutes before the nap attempt.
Do wake windows include feeding time?
Yes. The wake window starts the moment your baby's eyes open, including feeds, nappy changes, and play. Everything counts. A common mistake is starting the clock after the first feed, which pushes the window too long and leads to an overtired baby.
Should I wake my baby from naps to protect wake windows?
Sometimes, yes. If a nap runs so long that it pushes bedtime too late, it is worth gently waking your baby. The last nap of the day is the most common one to cap. As a general principle, protect bedtime first, then work backwards.
How do I know if wake windows are too long or too short?
Too short: your baby takes ages to fall asleep, plays in the cot, or has very short naps. Too long: your baby is fussy, crying, hard to settle, and may take short naps because they are overtired. The sweet spot is when they fall asleep within 10 to 15 minutes of being put down.
Need help getting wake windows right?
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