Baby Sleep Calculator

The total sleep range shown is the AAP/NSF recommended window for your baby's age group. Both the lower and upper bounds represent healthy outcomes — a baby consistently sleeping at the low end of the range is not necessarily sleep-deprived, just as a baby at the high end is not necessarily oversleeping. What matters most is whether your baby seems well-rested, alert, and feeding and growing normally.

Night sleep estimates reflect what is typical for consolidated overnight stretches at each age, but individual variation is wide. Newborns may not consolidate any nighttime sleep; by 6 months many babies sleep 10-12 hours overnight with 1-2 brief wakings. A baby who wakes more than expected but returns to sleep easily is generally not a cause for concern — but persistent short night sleep alongside daytime fussiness may signal a schedule or environment issue worth discussing with your pediatrician.

Nap counts are averages that taper with age. Watch for your baby's own sleep cues — yawning, eye rubbing, and fussiness — as signals that a nap is needed, rather than following the clock rigidly. Nap transitions (e.g., dropping from 3 naps to 2, or 2 to 1) are often accompanied by a temporary period of overtiredness before the new schedule stabilizes.

If your baby is consistently sleeping significantly outside the recommended ranges, is difficult to rouse for feedings, or seems excessively drowsy or irritable despite adequate sleep time, consult your pediatrician. These can occasionally be signs of illness, feeding challenges, or a sleep disorder requiring professional evaluation.

This calculator applies age-bracket sleep recommendations published by the American Academy of Pediatrics (AAP) and the National Sleep Foundation (NSF). Both organizations have reviewed the research on pediatric sleep physiology and defined ranges for total daily sleep, categorized into six developmental stages from newborn through 24 months.

Within each age bracket, the calculator estimates the typical night sleep range based on circadian rhythm maturity at that stage, then derives daytime sleep as the difference between total sleep needs and expected nighttime sleep. Nap count estimates reflect the typical number of nap periods needed to distribute that daytime sleep across the day without creating excessive awake windows.