When to drop the 4-to-3 nap transition
Signs your baby is ready, the average age, and a week-by-week schedule for moving from 4 naps to 3 without losing sleep.
Sleep · Transitions
TL;DR
Most babies drop the 4th nap between 4 and 6 months. Signs you're ready: baby is fighting the late afternoon nap, wake windows stretch to 90+ minutes between naps 3 and 4, naps 1-3 are consolidating to 1+ hour each. The transition is usually a 5-7 day disruption. Move bedtime 30-45 minutes earlier during the transition week to bridge the gap.
Nap transitions are about wake windows, not the calendar. Use our wake windows calculator to see where your baby's age range puts the right window count.
What "4 naps to 3" actually means
Newborns (0-3 months) sleep in random patterns - lots of naps, no real structure. Around 3-4 months, the structure starts emerging:
4-nap structure (typical 3-5 months):
- Wake at 6:30 AM.
- Nap 1 at 8:00 AM (about 1 hour).
- Nap 2 at 10:30 AM (about 1 hour).
- Nap 3 at 1:00 PM (about 1.5 hours).
- Nap 4 at 4:00 PM (about 30-45 minutes - the "bridge" nap).
- Bedtime 7:00 PM.
3-nap structure (typical 5-8 months):
- Wake at 6:30 AM.
- Nap 1 at 8:30 AM (about 1 hour).
- Nap 2 at 11:30 AM (about 1.5 hours).
- Nap 3 at 2:30-3:00 PM (about 45-75 minutes).
- Bedtime 7:00 PM.
The transition is about consolidating: longer wake windows between naps, longer individual naps, and dropping the bridge.
When to drop nap 4
The average age is 5 months. Range is 4 to 6.5 months. Premature babies usually do it later by 2-4 weeks adjusted age.
The signs:
1. Baby fights nap 4. They used to fall asleep within 5 minutes of being put down at 4 PM. Now it takes 20 minutes of fussing. They're not tired enough.
2. Wake windows are stretching. Between nap 3 and nap 4, baby is happy and alert for 90+ minutes (instead of the previous 60-75).
3. Naps 1-3 are getting longer. Instead of 45-minute power naps, they're now 60-90 minutes. Total daytime sleep is consolidating.
4. Nap 4 disrupts bedtime. Baby naps until 5:30 PM and isn't sleepy at 7 PM bedtime. Or skips nap 4 and is overtired at 7 PM bedtime. Either way, the 4-nap structure isn't working anymore.
5. Night sleep is getting choppy. Sometimes the 4th nap pulls so much sleep into the daytime that night sleep fragments. If your baby was sleeping 11 hours and is now sleeping 9-10, the transition might help.
You don't need all five signs. Two or three is enough to try.
The transition week
The transition isn't gradual - you're dropping a nap. But you can soften the impact.
Day 1-2. Skip nap 4. Bridge to bedtime with a snack and quiet play. Move bedtime 30-45 minutes earlier than usual. (If bedtime was 7, make it 6:15-6:30.)
Day 3-4. Same schedule. Earlier bedtime. Baby may be cranky in the late afternoon. Get through it.
Day 5-7. Wake windows naturally extend. Naps 1-3 may get slightly longer. Bedtime starts to drift later again - by day 7, you should be back to your normal bedtime (or 15 minutes earlier).
Most babies adjust within a week. Some take 2 weeks. A small number bounce back to needing nap 4 - if they're consistently overtired by 5 PM and bedtime is a fight, they weren't quite ready.
The reverse transition
If you drop nap 4 and after a week, things are clearly worse - more frequent night wakings, very early morning wakes, generally cranky baby - you may have moved too soon. Reverse course.
Add nap 4 back. Make it short (30 minutes max), early enough that it doesn't disrupt bedtime. Try again in 2-3 weeks.
Don't see this as failure. Some 4-month-olds are ready; some aren't. The "too early" version of the transition just means try again in a few weeks.
Find the right wake windows for your baby's age
Nap count is downstream of wake windows. Use our free wake windows calculator to find the right structure.
Try the calculatorCommon transition problems
Early morning waking. If baby starts waking at 5 AM during the transition, they're overtired at bedtime. Move bedtime earlier by 30 minutes. Most early wakings resolve in 7-10 days at the earlier bedtime.
30-minute nap 1. If nap 1 is suddenly 30 minutes instead of 60, baby isn't sleep-pressured enough at that time. Stretch the morning wake window by 15 minutes (instead of 8:30, try 8:45 nap 1).
Refused nap 3. Sometimes baby refuses the afternoon nap entirely during the transition. If this is consistent (3+ days), try moving nap 2 earlier so nap 3 lands at the right time.
5 PM meltdown. Late afternoon fussiness is normal during the transition. Use quiet activity, snuggles, a snack. Don't try to nap them at 5 PM - that just disrupts bedtime.
The 3-to-2 transition (next step)
Most babies don't go from 4 naps to 2. The intermediate stop is 3 naps, which lasts about 3-4 months on average.
The 3-to-2 transition typically happens between 7 and 10 months. The 2-nap structure (morning nap + afternoon nap) lasts until 12-18 months, then the 2-to-1 transition kicks in.
Each transition is similar in pattern: signs, 5-7 day disruption, bedtime shift, settle. Use the same playbook.
Schedule notes for the new 3-nap structure
Once you're settled at 3 naps, here's the rough framework that works for most babies 5-8 months.
- Total daytime sleep: 3-3.5 hours.
- Wake windows: 2-2.5 hours between naps 1 and 2, 2.5-3 hours between naps 2 and 3, 3-3.5 hours from nap 3 to bedtime.
- First nap usually consolidates around 60-75 minutes.
- Second nap is often the longest (1-1.5 hours).
- Third nap is shorter (30-60 minutes) - it's a bridge to bedtime.
Bedtime stays around 7:00 PM. Some babies need 6:30-6:45 bedtime in the first 2 weeks of the new structure.
What if your baby is older?
If your baby is past 6.5 months and still doing 4 naps, the issue is probably wake windows or sleep environment, not biology. Time to actively transition.
Start by trying to extend wake windows by 15 minutes per day. If the 4th nap naturally drops within a week of longer wake windows, great. If it doesn't, do an explicit transition (skip nap 4, early bedtime, 7-day adjustment).
Babies who linger in the 4-nap structure past 7 months are usually undertired at each nap. That cascades into short naps and frequent wakings.
When to call your pediatrician
- You've completed the transition but baby's total sleep dropped significantly and hasn't recovered.
- Night wakings increased dramatically and haven't resolved within 2 weeks.
- Baby seems chronically overtired (puffy eyes, frequent meltdowns, won't fall asleep at expected times).
- You're unsure whether your baby is ready - your pediatrician can usually weigh in on individual variation.