Baby Nap Calculator

Get your baby's custom nap schedule based on their age and wake windows. Science-backed timing for every stage from newborn to toddler.

AAP 2022 Guidelines Instant Schedule Ages 0 to 36 Months
0m 36m

6 months · 2-3 naps · 2-2.5h wake window

Use your baby's actual wake time today

Guidance only. Always follow your baby's individual cues and consult your pediatrician.

Wake Windows by Age: Complete Reference Table

Based on AAP 2022 recommendations, National Sleep Foundation 2024 guidelines, and Cleveland Clinic data:

Age Wake Window Naps per Day Total Sleep
0 to 1 month45 to 60 min4 to 616.5 hrs
1 to 2 months55 to 70 min4 to 515.5 hrs
2 to 3 months60 to 80 min4 to 515 hrs
3 to 4 months75 to 100 min3 to 414.5 hrs
4 to 5 months90 to 120 min3 to 414 hrs
5 to 6 months105 to 135 min2 to 314 hrs
6 to 8 months2 to 2.5 hrs2 to 314 hrs
8 to 12 months2.5 to 3.5 hrs214 hrs
12 to 18 months3.5 to 4.5 hrs1 to 213 hrs
18 to 24 months4 to 5 hrs113 hrs
2 to 3 years5 to 7 hrs0 to 112 hrs

What is a Wake Window?

A wake window is the maximum time a baby can comfortably stay awake before overtiredness begins to set in. Unlike adults who can push through tiredness, babies who exceed their wake window enter a state of physiological stress.

When a baby exceeds their wake window, the body releases cortisol (the stress hormone). This cortisol disrupts the natural production of melatonin, which is the sleep hormone, making it significantly harder for the baby to fall and stay asleep. An overtired baby often becomes harder to settle, not easier.

Wake window too long (overtired)

  • Arching the back
  • Rubbing eyes or ears
  • Blank or glazed stare
  • Fussiness that escalates quickly
  • Yawning repeatedly

Fix: Shorten next wake window by 10 to 15 minutes

Wake window too short (undertired)

  • Takes 30 or more minutes to fall asleep
  • Fights the nap despite appearing tired
  • Wakes frequently during the nap
  • Appears alert and playful at nap time

Fix: Extend next wake window by 10 to 15 minutes

Nap Transitions by Age

Nap transitions are one of the most common sources of confusion for new parents. Here is when to expect each one:

4 to 5 months
4 naps to 3 naps

Signs: consistently fighting the 4th nap, takes 30 or more minutes to settle, short 4th nap for 5 or more days in a row

6 to 8 months
3 naps to 2 naps

Signs: fighting the 3rd nap for 5 to 7 consecutive days, late bedtime becoming difficult, morning wake time creeping earlier

14 to 18 months
2 naps to 1 nap

Signs: consistently skipping one nap, fighting both naps but sleeping fine with one, one nap ending very late pushing bedtime

3 to 5 years
1 nap to no nap

Signs: not falling asleep at nap time for 2 or more weeks consistently, but still benefits from quiet rest time in the afternoon

Baby Sleep Regression Ages

Sleep regressions are temporary disruptions in sleep caused by developmental leaps. Knowing when to expect them helps you stay calm:

4 months
95% of babies

Permanent change in sleep cycle architecture. The biggest and most impactful regression.

6 months
45% of babies

Triggered by solids introduction and teething starting. Often coincides with a nap transition.

8 to 10 months
70% of babies

Separation anxiety peaks. Major motor milestones like crawling and pulling to stand disrupt sleep.

12 months
55% of babies

Developmental leap, first steps emerging. May coincide with the 2-to-1 nap transition beginning.

18 months
80% of toddlers

Language explosion and molar teething combine for a potent regression. Strong opinions and independence emerge.

2 years
65% of toddlers

Nightmares begin, increased imagination, and strong independence. May start resisting the nap.

Frequently Asked Questions

What is a wake window for a baby?

A wake window is the maximum time your baby can comfortably stay awake before overtiredness causes cortisol release and disrupts sleep. Each age range has a specific window that widens as babies develop. For example, newborns have 45 to 60 minute windows while 12-month-olds can manage 3 to 4 hours.

When should I start a sleep schedule?

A loose routine can start around 3 to 4 months when circadian rhythms begin developing. Before 3 months, schedules are primarily feed-led. By 4 to 6 months, consistent nap timing becomes practical and beneficial for both baby and parents.

How many naps does a 6-month-old need?

Most 6-month-old babies need 2 to 3 naps per day with wake windows of 2 to 2.5 hours. Total daytime sleep is around 2 to 3 hours, and nighttime sleep approximately 10 to 11 hours, totaling about 14 hours per day.

Why is my baby fighting naps?

Nap resistance happens when the wake window is either too long (overtired) or too short (undertired). An overtired baby has elevated cortisol making settling harder. An undertired baby simply is not sleepy enough. Watch for cues and adjust the window by 10 to 15 minutes in either direction.

What is the 2-3-4 nap schedule?

The 2-3-4 schedule works well for babies on 2 naps (typically 6 to 8 months). The first wake window after morning wake is 2 hours, the second window between naps is 3 hours, and the final window before bedtime is 4 hours. It naturally aligns with developmentally appropriate wake windows.

When do babies drop to one nap?

The 2-to-1 nap transition typically happens between 14 and 18 months. Signs include consistently fighting or skipping one nap for 5 or more consecutive days, or one nap pushing bedtime too late. Do not rush this transition as it often leads to overtiredness.

How long should baby naps be?

Nap length depends on age and individual variation. Newborns: 20 to 45 minutes per nap. Infants 4 to 8 months: 45 to 90 minutes. Babies 9 to 18 months: 60 to 90 minutes per nap. Toddlers on one nap: 1 to 2 hours. Consistent nap lengths help regulate the overall sleep schedule.