You came onto the internet looking for a clean answer. How long should her nap be? You want a number. Just one number. Possibly a colourful chart.
The colourful chart you'll find online is mostly wrong, because nap length varies so much by age and by kid that one chart can't actually cover it. But there are real ranges, real averages, and real signs that a nap is too short, too long, or just right for the day.
Here's what the research and actual paediatric sleep work shows.
Newborn (0 to 3 months): naps everywhere
Total daily sleep: 14 to 17 hours Nap structure: 4 to 6 naps, no real pattern Nap length range: 30 minutes to 4 hours
At this age, you don't shape naps. You support them. A newborn cycles between sleep and waking roughly every 2 to 3 hours, and her brain has not yet built the ability to consolidate sleep into long stretches. A 22-minute nap is fine. A 3-hour nap is fine. Wake windows are around 45 to 90 minutes max.
Don't try to nap-train a newborn. It's biologically impossible until at least 4 months, and trying will only exhaust you.
3 to 4 months: short naps become a thing
Total daily sleep: 14 to 16 hours Nap structure: 3 to 4 naps Nap length range: 30 minutes to 2 hours Wake windows: 75 to 105 minutes
This is when "the short nap" begins. As her sleep cycles mature (see the 4 month sleep regression), she'll start waking exactly 30 to 45 minutes into a nap, which is one sleep cycle. Some babies link cycles, some don't.
If she's only doing 30-minute naps, this is normal at this age. Don't try to fix it. Just offer her the next nap at the right wake window, and watch she doesn't get overtired.
4 to 6 months: 3 naps, getting longer
Total daily sleep: 13 to 15 hours Nap structure: 3 naps (morning, midday, late afternoon) Nap length range: 45 minutes to 2 hours Wake windows: 1.5 to 2 hours
The morning nap and midday nap tend to consolidate first. The late afternoon nap is often the short, ratty one. That's fine. Its job is just to bridge to bedtime.
A common pattern at this age: 75-min morning nap, 90-min midday nap, 30-min late nap.
6 to 9 months: 2 to 3 naps
Total daily sleep: 13 to 14 hours Nap structure: 2 to 3 naps (often dropping to 2 around 8-9 months) Nap length range: 60 to 120 minutes per nap Wake windows: 2 to 3 hours
The late afternoon nap usually drops first, somewhere between 7 and 9 months. The two remaining naps will lengthen to fill the gap.
A reasonable target: 90-min morning nap, 90-min afternoon nap.
9 to 12 months: 2 naps, locking in
Total daily sleep: 12 to 14 hours Nap structure: 2 solid naps Nap length range: 60 to 120 minutes per nap Wake windows: 3 to 4 hours
Most babies are now solidly on 2 naps. The "should we drop to 1?" question often gets asked too early at this age. The answer is almost always no, not yet. Hold the 2-nap structure until 14 to 18 months when you start seeing real consolidation signs.
12 to 18 months: the 2-to-1 nap transition
Total daily sleep: 11 to 14 hours Nap structure: 2 dropping to 1 Nap length range: when on 1 nap, 90 to 180 minutes Wake windows: 4 to 5 hours either side of the single nap
The transition to one nap is messy. For about 6 weeks, you'll have days where she needs two naps and days where she needs one. Move slowly. Push the morning nap later by 15 minutes a week until it merges with the afternoon nap into one big midday nap.
The single nap should ideally be at least 90 minutes. If it's only 45, she'll be wrecked by 5pm.
18 months to 3 years: one solid afternoon nap
Total daily sleep: 11 to 14 hours Nap structure: 1 nap, after lunch Nap length range: 90 to 180 minutes Wake windows: 5 to 6 hours
This is the golden era of toddler napping. The nap is long, predictable, and usually the parents' only daily window for quiet. Most kids hold this structure from 18 months to roughly age 2.5 or 3.
Bedtime tends to be 11 to 12 hours after she woke. Watch the math: if she wakes 7am and naps 1pm to 3pm, bedtime is roughly 7pm.
3 to 5 years: dropping the nap
Total daily sleep: 10 to 13 hours Nap structure: 1 nap dropping to none Nap length when napping: 60 to 120 minutes
Most kids drop the nap between age 3 and 4. Some hold it til 5. The transition is rough for about 4 to 6 weeks, then it normalises into a slightly earlier bedtime (6:30 to 7pm) instead.
Quiet time can replace the nap. An hour of books and audio stories in her room, lights low, is enough to reset her for the afternoon even without sleep.
Signs the nap structure is off
For every age, there are warning signs:
- She's overtired and crashing into bedtime: nap is too short, wake window too long
- She wakes early in the morning, energy crashes mid-morning: bedtime too late, or last nap too late
- Nap is great but bedtime is a 90-minute battle: nap is too long or too late
- 5pm meltdowns every day: she's missing a nap she still needs
The clock matters less than the structure. Two days of the same wake-up plus two days of the same nap window will tell you more than any chart.
What to tell yourself when the nap goes wrong
She's not broken. You haven't ruined her. The 25-minute nap on Tuesday is not the end. Tomorrow you can adjust the wake window by 15 minutes and try again.
Naps are messier than nights, partly because the daytime nervous system is more sensitive to interruptions, partly because most modern households are busier than babies' bodies are built for. Most kids' nap patterns settle by month 9 or 10 and then start their next transition.
Hold the structure. Trust the science. Don't panic over a single short nap. You're doing it right.