Wake window calculator
Enter your baby's age and wake time to find the recommended time for their next nap — so you can put them down before overtiredness sets in.
What are wake windows?
A wake window is the duration of time a baby can stay awake comfortably between naps without becoming overtired. Tracking these windows helps reduce fussiness at nap transitions and improves nighttime sleep quality.
Every baby is different — these ranges are general guidelines. If your baby consistently seems overtired or under-tired at the recommended times, adjust by 15–30 minutes in either direction and see what works.
Free to use
Managing two kids' sleep windows at once?
Sibling Stack shows both your kids' wake windows on one timeline so you can see where they overlap and plan around conflicts.
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