When your baby will not nap, a wake-window chart is often the first thing you find. The times can offer a rough guide, but they make more sense once you know where they come from and what they can—and cannot—tell you.
Where do the numbers come from?
You will often see ranges such as 45–90 minutes for newborns and one and a half to two and a half hours for babies around four to six months. These charts are mostly created by parenting websites and sleep consultants. Major health authorities do not publish an official minute-by-minute wake window for each age, so it is better to treat the numbers as a starting point rather than a rule.
What changes as babies grow?
A baby's total sleep needs gradually change, and the stretches they spend awake usually get longer. What does not follow a fixed pattern is the exact number of naps or the precise gap between them. A wake window that works well today may need to shift as your baby grows—or simply because tomorrow is a different day.
Your baby's own pattern is more useful
Look back at the naps that went well and note how long your baby had been awake beforehand. Over time, those records can reveal a pattern that is more useful than a generic chart. Nerumi brings those sleep records together so you can see your baby's rhythm as it develops.