Baby wake windows by age

Wake windows are the periods a baby is awake between sleep periods. They generally get longer with age, but they are flexible guidance rather than a precise biological deadline.

How to use wake windows

Start with an age-appropriate range, then watch how easily your baby settles and how the rest of the day unfolds. A wake window starts when the baby wakes and ends when sleep begins—not when the routine starts.

Why Lulla shows ranges

Sleep timing varies by baby and by day. A range is more honest than one exact minute. The calculator also distinguishes between a next nap and bedtime, and shows a flexible suggested nap duration.