Enter your baby's age to see a typical wake window, work out roughly when the next nap is due, and understand why the clock is only ever half the story.
A wake window is simply how long your baby can comfortably stay awake between sleeps — measured from the moment they wake up to the moment they next fall asleep. Get it roughly right and sleep tends to come more easily. Stretch it too long and an overtired baby often fights sleep harder, not less.
Wake windows grow as your baby does: from around 45–60 minutes for a brand-new newborn to five or six hours before bed by toddlerhood. The ranges below are the same ones that power HeyBaby, so what you see here matches what the app uses.
Typical ranges, aligned to HeyBaby. Naps and totals are approximate — every baby sits somewhere a little different on these.
| Age | Typical wake window | Naps / day |
|---|---|---|
| Newborn (0–6 weeks) | 45 min – 1 hour | 4+ (variable) |
| 6–12 weeks | 1 – 1 hr 45 min | 4+ |
| 3 months | 1 hr 15 – 2 hours | 4 |
| 4 months | 1 hr 15 – 2 hr 15 | 4 → 3 |
| 5 months | 1 hr 30 – 2 hr 30 | 3 |
| 6 months | 1 hr 45 – 2 hr 45 | 3 |
| 7 months | 2 hr 15 – 3 hr 15 | 3 → 2 |
| 8–9 months | 2 hr 30 – 3 hr 30 | 2 |
| 10–11 months | 3 – 3 hr 45 | 2 |
| 12 months | 3 hr 15 – 4 hours | 2 |
| 13–15 months | 3 hr 45 – 5 hours | 2 → 1 |
| 16–18 months | 4 hr 30 – 5 hr 30 | 1 |
| 19–24 months | 5 – 6 hours | 1 |
| 2–3 years | 5 hr 30 – 6 hours | 1 |
Here's the thing every wake window chart quietly leaves out: these numbers are averages. They're built from lots of babies pooled together, which makes them a genuinely useful starting point — but your baby isn't an average. They're one specific little person, with their own temperament, their own nap quality, and their own way of moving through each day.
Two babies the same age can need windows 45 minutes apart and both be completely normal. The same baby can need a 90-minute window after a short nap and a two-hour window after a long one. Time of day matters. A developmental leap matters. Whether the last nap was in the cot or the buggy matters.
So a chart can tell you roughly where to start looking — but it can't tell you what your baby needs today. For that, the most reliable signal isn't a number on a page. It's the pattern in your baby's own sleep, watched over time.
A chart gives you the average. HeyBaby Compass learns from your baby's own logged sleep and suggests windows shaped by their real patterns — not a number meant for everyone. See how it works, or pop the calculator in your pocket by downloading the app.
Or get it on your phone:
A wake window is the length of time a baby can comfortably stay awake between sleeps — from waking up to next falling asleep. Windows lengthen with age, from around 45–60 minutes for a newborn to several hours by toddlerhood.
Around 3 months, a typical wake window is roughly 1 hour 15 minutes to 2 hours, with about 4 naps a day. It's a guide only — your baby's tired cues and the time of day matter more than their age alone.
They're averages across many babies, so they can't account for your baby's temperament, nap quality, time of day or stage of development. A useful starting point, but your baby's cues and how the day is actually going matter more than the clock.
