Infant & Toddler Sleep
Sleep is when the developing brain consolidates learning and the body releases the growth hormone pulses that drive height gains. The right total sleep — and the right split between night and naps — changes month by month in the first two years.
Last reviewed: June 25, 2026
Calculators in this topic
Free, evidence-based tools — no signup, no data stored.
How much sleep does your child need? Get age-based total sleep hours, suggested bedtimes, and nap patterns based on AAP/AASM guidance.
Convert your baby's date of birth to exact age in years, months, weeks, and days. Perfect for milestones, vaccinations, and pediatric visits.
Score the Ages & Stages Questionnaire (ASQ-3) instantly across all five domains. Free, accurate, and aligned with official cutoffs.
How much sleep by age
AASM consensus: newborns 14–17 h, infants 12–16 h (with naps), toddlers 11–14 h, preschoolers 10–13 h, school-age 9–12 h. Use a wake-window calculator to plan a realistic nap schedule.
Sleep and development
Persistent under-sleep correlates with attention, behavior, and growth concerns. If sleep is a worry, pair sleep tracking with a developmental screen to rule out broader issues.
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