Fifteen-month-olds walk confidently and often hold onto a second nap a while longer.
About 11 to 14 hours per 24 hours, including naps.
Typically 1 to 2 naps a day.
Often 10 to 12 hours at a time.
Every baby is different. These are typical ranges for healthy, full-term babies, not targets. The easiest way to know your baby's normal is to track a couple of weeks and look at the pattern.
Thungu is a baby-tracking bot, not medical advice. If you're worried about feeding, weight, sleep, or development, talk to your pediatrician.