How Much Sleep Do You Need? Recommended Hours by Age
Sleep needs change across the lifespan. Current U.S. guidance from the AASM, AAP, CDC and National Sleep Foundation is broadly consistent, but age bands differ slightly. Use the chart below as population guidance, then consider sleep quality, daytime function and your own pattern.
For U.S. readers, a practical current summary is: 0–3 months: 14–17 hours; 4–12 months: 12–16 hours including naps; 1–2 years: 11–14; 3–5 years: 10–13; 6–12 years: 9–12; teens: 8–10; adults 18–60: 7 or more; adults 61–64: 7–9; adults 65+: 7–8. These are population recommendations, not exact prescriptions for every person.
CDC/NSF. AASM does not issue a recommendation under 4 months.
AASM/AAP/CDC. Includes naps.
Per 24 hours, including naps.
Per 24 hours, including naps where applicable.
AASM/AAP/CDC.
CDC; AASM/AAP use 13–18 years.
AASM/SRS and CDC minimum recommendation.
CDC and NSF age-specific range.
Sleep Need by Age Finder
Choose an age group to see the current public-health recommendation and the main source difference. This is a lookup tool, not a personalized diagnosis.
AASM, AAP, CDC and NSF Sleep Recommendations by Age
These organizations do not use identical age cutoffs. Showing the differences is more accurate than blending them into one invented range.
| Age | Practical U.S. summary | AASM / AAP | CDC | NSF | Important note |
|---|---|---|---|---|---|
| 0–3 months | 14–17 h / 24 h | No AASM recommendation under 4 months | 14–17 h | 14–17 h | Newborn sleep is highly variable and spread across day and night. |
| 4–11/12 months | 12–16 h / 24 h including naps | AASM/AAP: 12–16 h for 4–12 months | 12–16 h for 4–12 months | 12–15 h for 4–11 months | The one-hour difference reflects different consensus panels, not a contradiction requiring one “correct” cutoff. |
| 1–2 years | 11–14 h / 24 h including naps | 11–14 h | 11–14 h | 11–14 h | Strong agreement across organizations. |
| 3–5 years | 10–13 h / 24 h | 10–13 h, including naps | 10–13 h, including naps | 10–13 h | Some healthy children still nap. |
| 6–12 years | 9–12 h / 24 h | 9–12 h | 9–12 h | 9–11 h for 6–13 y | AASM/CDC use a wider upper bound for this age band. |
| 13–17 years | 8–10 h / 24 h | 8–10 h for 13–18 y | 8–10 h for 13–17 y | 8–10 h for 14–17 y | Age boundaries differ slightly; the duration recommendation is very similar. |
| 18–60 years | 7+ h / night | AASM/SRS: 7 or more h | 7 or more h | 7–9 h for 18–64 y | AASM sets a minimum threshold rather than an upper cutoff. |
| 61–64 years | 7–9 h / night | AASM adult statement: 7+ h | 7–9 h | 7–9 h within 18–64 adult band | CDC separates this group from 18–60. |
| 65+ years | 7–8 h / night | AASM adult statement: 7+ h | 7–8 h | 7–8 h | Individual variation and health status still matter. |
Why This Page Does Not Convert Sleep Need Into “90-Minute Cycles”
Sleep cycles are real, but they are not fixed 90-minute blocks that determine how much sleep a person needs. NHLBI notes that a cycle commonly restarts about every 80–100 minutes and that cycle composition changes across the night.
Duration guidance is based on health outcomes and population-level evidence. Cycle timing can be useful as rough planning context, but it should not replace age-appropriate sleep-duration guidance.
Why Your Personal Sleep Need Can Differ
Sleep need and sleep timing differ between people. Guidelines describe healthy populations, not one exact number for every individual.
People recovering from sleep restriction may temporarily need more sleep than usual.
Infection, pain, pregnancy, medications and recovery can change sleep duration or how rested you feel.
Fragmented or disrupted sleep can leave you tired even when your clock time looks adequate.
Healthy sleep is not only about duration. Timing, regularity, continuity and circadian alignment also matter.
For infants and young children, naps are part of the 24-hour recommendation. Adult naps do not automatically erase chronic short sleep.
Why You Can Sleep 8 Hours and Still Feel Tired
Eight hours in bed does not guarantee eight hours of restorative sleep. The useful question is whether you actually slept enough, slept at a workable biological time, and slept without major disruption.
Temporary grogginess after waking can happen even after a normal night and often improves as wakefulness continues.
Noise, pain, caregiving, reflux, sleep apnea and movement disorders can reduce restorative sleep even when time in bed is long.
Sleeping or waking at a biologically unfavorable time can make waking feel harder despite adequate duration.
Time to fall asleep and nighttime awakenings reduce actual sleep time.
Insomnia, sleep apnea, restless legs, narcolepsy and hypersomnolence disorders can cause unrefreshing sleep.
Illness, mood symptoms, substances and medications can affect alertness without changing the number on the clock.
How to Estimate Your Personal Sleep Target
Start with the published age recommendation, then use several weeks of sleep and daytime-function patterns to refine your target.
Use the published range or minimum as your reference point. Do not choose a target from a fixed number of sleep cycles.
If you need seven or more hours of actual sleep, time in bed generally needs to allow for your normal time to fall asleep and any awakenings.
Notice alertness, mood, concentration, unintended dozing, reliance on alarms and repeated weekend catch-up sleep.
If you remain sleepy and are routinely sleeping below the guideline, increase sleep opportunity gradually rather than chasing a cycle count.
If you remain markedly sleepy despite adequate opportunity—or regularly need far more or less sleep than expected—discuss it with a clinician.
When to Talk With a Clinician
Symptoms matter more than whether you land one hour above or below a table.
Unintended dozing, struggling to stay awake while driving, or needing frequent naps despite adequate sleep deserves evaluation.
These are reasons to evaluate for obstructive sleep apnea rather than simply extending time in bed.
Regularly sleeping long hours and still feeling markedly sleepy can occur with medical, psychiatric or hypersomnolence conditions.
Difficulty falling asleep or staying asleep despite adequate opportunity is not solved by choosing a different cycle count.
Frequently Asked Questions
How much sleep do adults need?
AASM and CDC recommend that adults ages 18–60 regularly get at least 7 hours of sleep. NSF recommends 7–9 hours for adults ages 18–64. Those statements are compatible: AASM sets a minimum, while NSF provides a recommended range.
Is 8 hours required for everyone?
No. Eight hours is a useful reference point, not a universal prescription. Individual sleep need varies, while population guidance still provides a useful health baseline.
Is 6 hours of sleep enough?
For most healthy adults, regularly sleeping 6 hours is below the AASM recommendation of at least 7 hours. Rare individual exceptions do not make 6 hours a general recommendation.
Do I need exactly five 90-minute sleep cycles?
No. Sleep cycles vary and commonly restart every 80–100 minutes. Current sleep-duration recommendations are based on total sleep duration and health outcomes, not a fixed cycle count.
Why am I tired after 8 hours?
Possible reasons include sleep inertia, fragmented sleep, circadian mismatch, sleep apnea, insomnia, illness, medication effects, stress, or less actual sleep than time in bed suggests. Cycle timing alone should not be assumed.
Do naps count for children?
Yes. AASM/AAP recommendations for infants and younger children use 24-hour totals and explicitly include naps.
Did sleep recommendations change in 2026?
The National Sleep Foundation’s 2026 10-year review re-evaluated the evidence and re-certified its existing duration recommendations rather than issuing a new set of hour ranges.
Related SmartSleepCalc Guides
Sources
- CDC. About Sleep — age-specific U.S. sleep-duration table. Page dated May 15, 2024; reviewed for this guide September 2026. CDC
- Paruthi S, et al. Recommended Amount of Sleep for Pediatric Populations: A Consensus Statement of the American Academy of Sleep Medicine. J Clin Sleep Med. 2016;12(6):785–786. Reviewed September 2026. AASM
- American Academy of Pediatrics / HealthyChildren.org. Healthy Sleep Habits: How Many Hours Does Your Child Need? Current parent guidance reviewed September 2026. AAP parent guidance
- Watson NF, et al. Recommended Amount of Sleep for a Healthy Adult: A Joint Consensus Recommendation of the AASM and Sleep Research Society. 2015. Reviewed September 2026. AASM consensus hub
- Hirshkowitz M, et al. National Sleep Foundation’s updated sleep duration recommendations: final report. Sleep Health. 2015;1(4):233–243. Re-certified by the 2026 NSF review below. PubMed
- Dzierzewski JM, et al. How much sleep do you need: A 10-year systematic review of National Sleep Foundation’s sleep duration recommendations and examination of sex differences. Sleep Health. 2026;12(4):599–611. Published online June 5, 2026. 2026 review
- NHLBI. Sleep Stages and Sleep Cycles. Current NIH guidance reviewed September 2026. NHLBI
