Do you really need exactly 8 hours of sleep?
Does everyone need exactly eight hours? This Short puts that belief next to what sleep researchers recommend: most adults do best with 7 to 9 hours, the right amount varies from person to person, and how you feel during the day is a helpful guide.
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What it says
Myth: everyone needs exactly 8 hours. Fact: most adults do best with 7 to 9 hours, and the right amount varies from person to person. The National Sleep Foundation’s updated recommendations, from an expert panel that reviewed the research, put adults aged 18 to 64 at seven to nine hours a night. A joint consensus statement from the American Academy of Sleep Medicine and the Sleep Research Society recommends seven or more hours for healthy adults. Eight hours sits inside that range, but it is an average, not a rule. The Short’s tip is to notice how you feel during the day, which is a helpful guide to whether you are getting enough.
Try it tonight
Our free how much sleep do I need tool shows the recommended ranges by age, and the sleep calculator works backwards from your alarm to suggest bedtimes. For a simple test, keep the same wake-up time for a week and adjust your bedtime until you wake without dragging and stay alert through the afternoon.
This is general information, not medical advice. If you sleep a full night and still feel exhausted, or you regularly need far more or far less sleep than this, talk to a doctor.
About these Shorts
Our myth vs fact Shorts put one common sleep belief next to what the evidence says, with the sources listed below. There is no voice in this one: the myth, the fact and the tip appear as text over real footage of an aurora at dawn above a mountain lake. For more, see can you catch up on sleep over the weekend?, warm or cool bedroom? and do we need less sleep as we get older?
Why a range, not a number
People differ in how much sleep they need, partly through age and partly through individual differences. That is why the guidelines give a range. A night or two outside it is normal; what matters more is the pattern over weeks and how you feel while you are awake.
Transcript
There is no narration. The on-screen text, in order:
Do you really need exactly 8 hours of sleep?
Myth: “Everyone needs exactly 8 hours.”
Fact: Most adults do best with 7 to 9 hours… and the right amount varies from person to person.
Tip: Notice how you feel during the day. It’s a helpful guide.
How this was made
Footage: real stock video of an aurora at dawn over a mountain lake (Mixkit, Mixkit Free License), cropped and graded by SleepBetter. Audio: a soft procedural pad, light wind, brown noise and gentle chimes generated by SleepBetter’s own sound engine. Text overlay by SleepBetter. No voice and no AI-generated picture.
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Free playerFree sleep sound player
Play white, pink, brown and green noise, rain and a lofi beat in your browser, with a sleep timer.
Free toolHow much sleep do I need?
Enter an age to see the recommended hours of sleep from the National Sleep Foundation’s expert panel.
Sources
- Hirshkowitz M, et al. National Sleep Foundation’s updated sleep duration recommendations: final report. Sleep Health, 2015.
- Watson NF, et al. Recommended Amount of Sleep for a Healthy Adult: A Joint Consensus Statement of the American Academy of Sleep Medicine and Sleep Research Society. Sleep, 2015.
- National Sleep Foundation. How Many Hours of Sleep Do You Really Need?
- Sleep Foundation. How Much Sleep Do You Need?
Sleep videos and guided relaxation are for general wellness, not medical advice. If poor sleep is affecting your days, talk to a doctor or a sleep specialist.