Baby sleep
What is a wake window?
A wake window is the stretch of time a baby is awake between sleep periods. Parents sometimes use it as a loose planning aid for naps and bedtime.
Think of it as a starting point
Every baby is different, and the same baby can have a different day depending on feeds, activity, illness, travel, or development. A wake window is a planning estimate, not a rule to force.
Sleep cues and your own observations still matter. A baby who is settling well may be ready earlier or later than a chart suggests.
Use the clock to reduce mental load
When the day is busy, noting when baby woke up can be more useful than trying to remember it. A calculator can turn that one time into a rough next-sleep range, leaving you free to adjust for the day in front of you.
For persistent sleep concerns, or concerns about safety, speak with a qualified pediatric professional.