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Calculate Your Sleep ScoreWhat the CDC Says About Sleep Duration in 2026
The Centers for Disease Control and Prevention (CDC) considers insufficient sleep a public health epidemic. In their most recent national survey, over 35% of American adults reported regularly sleeping fewer than 7 hours — the minimum recommended threshold for adults aged 18–60.
More alarmingly, the CDC found that short sleep (less than 7 hours) is more prevalent among certain demographics: non-Hispanic Black adults (45.8%), adults with less than a high school education (40.4%), divorced/widowed/separated individuals (40.2%), and those unable to work (55.1%).
Sleep Recommendations by Age (CDC & AASM 2026)
The American Academy of Sleep Medicine (AASM) and the Sleep Research Society jointly published evidence-based sleep duration recommendations. These represent the amount of sleep needed daily for optimal health:
- Newborns (0–3 months): 14–17 hours (including naps)
- Infants (4–12 months): 12–16 hours
- Toddlers (1–2 years): 11–14 hours
- Preschoolers (3–5): 10–13 hours
- School-age children (6–12): 9–12 hours
- Teenagers (13–18): 8–10 hours
- Adults (18–60): 7 or more hours
- Adults (61–64): 7–9 hours
- Adults 65+: 7–8 hours
Why the 7-Hour Minimum Is Not Arbitrary
The 7-hour threshold is derived from large-scale population studies examining health outcomes across different sleep durations. A landmark analysis by the AASM and Sleep Research Society reviewed data from 16 epidemiological studies and found a J-shaped curve: both too little and too much sleep were associated with increased mortality risk, with the nadir at 7–9 hours.
The Consequences of Short Sleep
The CDC links chronic short sleep to the following health outcomes: Obesity — individuals sleeping less than 7 hours are 45% more likely to be obese. Diabetes — short sleep impairs insulin sensitivity and glucose metabolism. Cardiovascular disease — increased risk of hypertension, heart attack, and stroke. Mental health — strong bidirectional relationship with depression and anxiety. Immune function — people sleeping 6 hours or fewer are over 4x more likely to catch a cold when exposed to the virus. Accidents — drowsy driving causes over 6,000 fatal crashes annually in the US.
How to Calculate Whether You Are Getting Enough
Use our free Sleep Score Calculator to measure not just duration but the quality of the sleep you are getting. Two people both sleeping 7 hours can have very different sleep scores depending on their sleep efficiency, latency, and night wakings. Duration is the foundation — quality is built on top of it.
About This Article
Written by Sleep Score Pro Editorial Team · May 2026
Disclaimer: This article is based on our team's independent research and study of publicly available sleep science literature. We are not medical professionals. The information presented is for general awareness and educational purposes only. As per our team's research, we found this information useful for understanding sleep health - however, it does not constitute medical advice. Always consult a qualified healthcare provider for medical concerns.
Frequently Asked Questions
How many hours of sleep do adults need according to the CDC?
The CDC recommends adults aged 18–60 get 7 or more hours of sleep per night. Adults 61–64 need 7–9 hours, and adults 65+ need 7–8 hours. These recommendations align with the American Academy of Sleep Medicine (AASM) clinical guidelines.
What happens if you sleep less than 7 hours?
The CDC links sleeping less than 7 hours to increased risk of obesity (45%), heart disease, type 2 diabetes, stroke, mental health disorders, and motor vehicle crashes. Short sleep also impairs cognitive performance, immune function, and emotional regulation.
Is 6 hours of sleep enough?
No. Both the CDC and AASM classify 6 hours as "short sleep duration" — a public health concern. Only approximately 3% of people carry a rare genetic mutation enabling healthy function on 6 hours. Most people who believe they are "fine on 6 hours" have adapted to impairment and can no longer accurately assess it.
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