Sleep needs are not the same at every age — a newborn's rhythm looks nothing like a teenager's, and a retiree's sleep is different again. Most people learn a single figure like "eight hours" and assume it applies forever. In reality, guidelines published by organizations such as the National Sleep Foundation give different ranges for each life stage. This guide lays out those ranges, explains why they change, and offers practical tips for each group.
The ranges below are guidelines, and individual needs vary. They are estimates, not medical advice — see our disclaimer for details.
Guidelines by age group
The following ranges are approximate recommendations per 24 hours, based on the National Sleep Foundation's published guidelines:
| Age group | Recommended sleep (per 24h) |
|---|---|
| Newborns (0–3 months) | 14–17 hours |
| Infants (4–11 months) | 12–16 hours |
| Toddlers (1–2 years) | 11–14 hours |
| Preschool (3–5 years) | 10–13 hours |
| School-age (6–13 years) | 9–11 hours |
| Teens (14–17 years) | 8–10 hours |
| Adults (18–64 years) | 7–9 hours |
| Older adults (65+ years) | 7–8 hours |
Notice that the trend is downward but never to zero: even older adults need seven hours or more. The adult range is covered in more depth in our article on how much sleep adults need.
Why needs change across life
Sleep needs track development. Babies are growing rapidly, forming neural connections and building immune function, so their bodies demand far more sleep, spread across multiple periods day and night. As children grow, total sleep gradually falls and consolidates into a single night-time block. During adolescence, biological shifts make sleep timing later, even though the amount needed is still high. In adulthood, needs plateau, and in later life total sleep and deep sleep tend to decline — though poor sleep in older age is not something to accept silently if it affects daily life.
Tips for each stage
- Newborns and infants: follow your baby's cues; total sleep across day and night matters more than a strict schedule.
- Toddlers and preschool: keep consistent nap and bedtime routines, and watch for overtiredness, which can make settling harder.
- School-age: protect a regular bedtime even on weekends, and keep screens out of the hour before bed.
- Teens: a consistent wake time — including weekends — helps stabilise their naturally later body clock.
- Adults: match your sleep duration to how you feel; most adults land between seven and nine hours.
- Older adults: maintain regular light exposure and activity during the day, and avoid long daytime naps that shrink night sleep.
If you are not sure what time to go to bed for your age and schedule, the Sleep Calculator can help. Enter your wake-up time, and it suggests bedtimes based on whole sleep cycles and your sleep latency, so you can turn any of the ranges above into a concrete plan — estimates to try, not prescriptions.
Turn your target sleep duration into a real schedule — try the Sleep Calculator now.
Sources
- NHLBI — National Heart, Lung, and Blood Institute: Your Guide to Healthy Sleep
- CDC — Sleep and Sleep Disorders
Guidelines and figures in this article are estimates from public-health sources; individual needs vary. The sleep calculator is an educational tool, not medical advice.