Infant Sleep Schedule Calculator

The calculator uses age-based sleep ranges and selects their midpoint for a planning estimate. Newborns 0 to 3 months sleep 14 to 17 hours across the day and night, with 3 to 4 naps in this tool. From 4 to 6 months it uses 12 to 15 hours and 3 to 4 naps. From 7 to 12 months it uses 12 to 14 hours and 2 to 3 naps. Toddlers 13 to 24 months use 11 to 14 hours with 1 to 2 naps, and children 25 to 36 months use 10 to 13 hours with up to one nap.

A wake window is the time between sleep periods. This calculator starts with 75 minutes for newborns, 2 hours at 4 to 6 months, 3 to 3.5 hours at 9 to 12 months, and 5 to 5.5 hours at 18 to 24 months. These are schedule inputs, not a clinical assessment. Adjust a plan with a pediatric clinician if sleep, feeding, growth, or breathing concerns are present.

Most children drop from two naps to one between 13 and 18 months, with 15 months as the most common single-month landing spot. Signs the transition is ready include fighting the second nap, taking longer to fall asleep at night, or waking too early in the morning. During the transition itself many parents alternate days, since cold-turkey can leave the child overtired. In the calculator, switching the nap style to one nap lets you simulate that schedule and see the new bedtime.

Bedtime is mostly downstream of two things: how many naps the child takes and how long their last wake window is. Newborns nap so often that overnight sleep is shorter and bedtime is later, sometimes 22:00 or later, because they keep sleeping deep into the morning. As naps drop, the daytime sleep load shifts to the night and bedtime moves earlier. A toddler on one nap who needs 12 hours of sleep with a 07:00 wake time lands on a 19:00 to 20:00 bedtime, exactly what the calculator generates.

For infants through the first year, AAP guidance is to place a baby on their back in their own firm, flat sleep space with a fitted sheet and no loose bedding or soft objects. Room sharing without bed sharing is recommended for at least the first 6 months. The policy does not set a universal blanket or toy rule after age 1, so ask a pediatric clinician about an age-appropriate sleep space.