Wake Window Calculator: Predict the Sweet Spot for Next Nap

Nap Details

Select baby's age and last wake-up time

Baby's Current Age

Transitioning to a more predictable schedule.

Woke Up From Last Nap At

Wake windows should be adjusted based on your baby's unique sleepy cues like eye rubbing, yawning, or decreased activity.

Next Nap Sweet Spot

Invalid Date

Ideal window begins between Invalid Date and Invalid Date

Target Window: 120–150 minsStandard 5 Months Schedule

Typical Wake Windows

Recommended ranges as your baby grows

Age	Window Duration
0-4 Weeks	35 mins – 1.0h
1-2 Months	1.0h – 1.5h
3 Months	1.3h – 1.7h
4 Months	1.5h – 2.0h
5 Months	2.0h – 2.5h
6-7 Months	2.3h – 3.0h
8-10 Months	3.0h – 3.5h
11-12 Months	3.5h – 4.5h
13-18 Months	4.0h – 5.0h
18-24 Months	5.0h – 6.0h

Early Cues

• Losing interest in toys or people
• Staring off into space (the "long gaze")
• Quieter than usual

Overtired Cues

• Pulling at ears or rubbing eyes
• Arching back or very stiff body
• Second wind (sudden bursts of energy)

What is a Wake Window?

A wake window is the amount of time your baby is awake between naps. It includes the period from the moment they wake up until the moment they fall back asleep. Understanding these windows helps you catch the "sleep wave" before your baby becomes overstimulated and cortisol levels rise—making it harder for them to settle.

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