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Reference guide

Sleep needs change with age.

Compare general daily sleep-duration guidance, learn what changes across life stages, and connect those ranges to a practical bedtime or wake-up plan.

Birth to 2 yearsBabies and toddlersNewborn sleep, naps, routines, and infant safe-sleep priorities. 3 to 12 yearsChildrenPreschool and school-age sleep ranges, schedules, and bedtime planning. 13 to 17 yearsTeenagersEight-to-ten-hour guidance and the natural shift toward later sleep timing. 18 to 64 yearsAdultsGeneral duration guidance, schedule consistency, and realistic calculator use. 65 years and olderOlder adultsSleep duration, earlier body-clock timing, and common reasons sleep may change.

General daily sleep guidance

The ranges below summarize current guidance from the Centers for Disease Control and Prevention. For infants, toddlers, and preschoolers, the daily total includes naps.

Age groupAgeRecommended daily sleepDetailed guide
Newborn0–3 months14–17 hoursBabies and toddlers
Infant4–12 months12–16 hours, including napsBabies and toddlers
Toddler1–2 years11–14 hours, including napsBabies and toddlers
Preschool3–5 years10–13 hours, including napsChildren
School age6–12 years9–12 hoursChildren
Teen13–17 years8–10 hoursTeenagers
Adult18–60 years7 or more hoursAdults
Adult61–64 years7–9 hoursAdults
Older adult65 years and older7–8 hours in CDC guidanceOlder adults

Use age ranges as planning context

A duration range is not a diagnosis and does not predict exactly how much one person needs. Sleep quality, schedule regularity, health conditions, medicines, caregiving, school, work, and individual differences can all affect sleep.

SnoozeCalc keeps age optional so the calculator remains fast. Select the relevant guide first, then compare its duration range with the estimated sleep time shown beside each calculator result.

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For parents and caregivers: A general timing calculator does not replace pediatric guidance or infant safe-sleep recommendations. The babies-and-toddlers guide explains why adult-style cycle calculations are not the primary planning tool for infants.

How these guides are reviewed

Each page distinguishes published duration guidance from practical scheduling suggestions. Sources were checked on July 22, 2026. None of the pages is labeled as medically reviewed.

Sources

  1. Centers for Disease Control and Prevention: About Sleep
  2. National Heart, Lung, and Blood Institute: What Makes You Sleep?