Normal Sleep Hours by Age | Newborns to Older Adults
Normal sleep hours by age, from 17 hours for newborns to 7 for adults, plus why the number alone does not tell you whether your sleep is good enough.
Normal sleep hours by age range from 17 hours a day for newborns to 7 hours for adults, a gap that reflects how the function of sleep itself changes across the stages of life.
The number alone, however, is not enough to judge by. Someone who sleeps eight hours and wakes up tired has a problem with sleep quality rather than quantity, and no table reveals that.
Knowing the recommended figures for each age group helps you understand when the number of sleep hours is misleading.
How Many Hours of Sleep Does Each Age Need?
Newborns, 0 to 3 months: 14 to 17 hours a day.
Infants, 4 to 11 months: 12 to 15 hours a day.
Toddlers, 1 to 2 years: 11 to 14 hours a day.
Preschoolers, 3 to 5 years: 10 to 13 hours a day.
School-age children, 6 to 13 years: 9 to 11 hours a day.
Teenagers, 14 to 17 years: 8 to 10 hours a day.
Young adults, 18 to 25 years: 7 to 9 hours a day.
Adults, 26 to 64 years: 7 to 9 hours a day.
Older adults, 65 and above: 7 to 8 hours a day.
These figures cover total sleep across the day, meaning night sleep and naps together in the earlier age stages.
What Do the Saudi Ministry of Health Recommendations Say?
The Saudi Ministry of Health uses a simplified breakdown of sleep needs by age:
Children, 3 to 5 years: 11 to 13 hours a day.
Children, 6 to 12 years: 9 to 11 hours a day.
Teenagers, 13 to 19 years: 9 to 10 hours a day.
Adults and older adults, 20 years and above: 7 to 8 hours a day.
You may notice small differences between these figures and international recommendations, such as an upper limit for adults of 8 hours in one reference and 9 hours in another.
This is normal and does not mean there is a contradiction. Recommendations are ranges rather than fixed numbers, and they may differ slightly depending on the reference and the age groupings used. What they share is that an adult needs at least seven hours.
Assessing whether your actual sleep is sufficient starts with a sleep disorders consultation, not only with comparing yourself to a table.
How Do Normal Sleep Hours Change With Age?
Because the function of sleep itself changes.
In the first year, sleep is a core tool for growth. Growth hormone is released intensively and the brain develops at an unprecedented rate, which is why sleep hours reach two-thirds of the day.
In childhood and adolescence, sleep continues to serve physical growth and the consolidation of learning, but the need gradually falls as growth completes.
In adulthood the need settles at seven to nine hours, and the main role of sleep becomes daily repair, hormone regulation, and memory.
In older age, sleep structure changes more than sleep duration does.
How Much Do Newborns Sleep?
Sleep needs in newborns can vary widely. Some sleep up to 19 hours a day, while others manage with only 11.
This variation is normal and does not by itself call for concern. The more important measure in an infant is not the number of hours alone, but:
Steady weight gain and growth.
Good feeding.
Activity and alertness during waking periods.
Consult your pediatrician if you notice pauses in breathing during sleep, bluish colour around the lips, difficulty feeding, or slowing weight gain.
Why Do Teenagers Not Get Enough Sleep?
Normal sleep hours by age in adolescence come to 8 to 10 hours, but the reality is less than that for many teenagers.
The reason is not carelessness alone, but physiology as well. The body clock naturally shifts later in adolescence, so a teenager tends to sleep and wake late, and that tendency then collides with an early school start.
In Saudi society the problem is compounded by the pattern of late family nights and the difference in sleep times between school days and holidays, so a teenager lives through something resembling jet lag every week.
This may lead to:-
Declining concentration and academic achievement.
Mood swings.
Increased caffeine consumption.
Difficulty waking in the morning.
Sleeping for long stretches during holidays.
If delayed sleep persists despite attempts to adjust the schedule, the issue may be a body clock disorder rather than simply a bad habit.
Do Older Adults Need Less Sleep?
It is widely believed that older adults need less sleep, but this is not accurate.
The need remains seven to eight hours. What changes is sleep structure: deep sleep decreases, night awakenings increase, and the body clock advances, so an older person sleeps early and wakes early.
The common mistake is attributing sleep problems to age and leaving them alone, while many of them have a treatable cause, such as:
Sleep apnea, which becomes more likely with age.
Chronic pain.
Frequent night urination.
Taking several medications at the same time.
Low daytime activity and limited light exposure.
Chronic insomnia should not be treated as an inevitable result of ageing, and we covered the causes of insomnia and sleeplessness and how to tell them apart in a separate article.
Is the Number of Sleep Hours Enough to Judge Its Quality?
No, and this is the most important point.
A table of normal sleep hours by age measures the quantity of sleep, while what determines how you feel the next day is its quality.
The more accurate practical measure is that you wake up rested and stay alert through the day without overwhelming sleepiness.
Someone who sleeps seven continuous, deep hours may be better off than someone who spends nine hours in bed with fragmented sleep.
Problems that may fragment sleep without the person feeling them include:
Repeated pauses in breathing, which may occur several times an hour without the patient remembering them.
Involuntary leg movements.
Gastroesophageal reflux.
Pain that causes partial awakening without full awareness.
These problems happen during sleep, so they cannot always be assessed from the patient's description alone. They may need objective recording through a home sleep test, carried out in the patient's own bed with no hospital stay.
What Are the Signs of Insufficient or Poor-Quality Sleep?
You may not be getting enough or good sleep if you notice:
Severe daytime sleepiness, or falling asleep while driving or in meetings.
Waking up tired despite sleeping a suitable number of hours.
An increasing need for caffeine to stay alert.
Recurrent morning headaches.
Declining concentration and memory.
Mood swings and irritability.
Sleeping much longer during holidays, which may point to accumulated sleep debt.
Another clear sign is falling asleep within very few minutes of your head touching the pillow. This is not always evidence of good sleep, as some believe; it may instead be evidence of accumulated sleep deprivation.
Why Do I Sleep 8 Hours and Wake Up Tired?
This is one of the most common questions, and it has three main explanations.
1. Your Sleep Is Fragmented Without You Realising It
Obstructive sleep apnea is among the best known causes. The brain wakes momentarily with each pause to reopen the airway, and the patient may not reach the deep stages of sleep sufficiently.
2. Your Sleep Timing Does Not Match Your Body Clock
Sleeping from four in the morning until noon is not always equivalent to sleeping from ten at night until six in the morning, even when the number of hours is the same.
3. There Is an Accompanying Medical Cause
Such as anemia, a thyroid disorder, vitamin D deficiency, or a medication side effect.
What these causes share is that none of them is solved simply by increasing the number of sleep hours. Fatigue may in fact increase the more time you spend in bed.
You can learn about the assessment steps, having the test, and reading the result through the article on my experience with sleep apnea.
When Does a Sleep Problem Call for Seeing a Doctor?
See a specialist if:
You consistently wake up tired despite getting enough sleep in numerical terms.
Those around you notice loud snoring or pauses in your breathing.
You feel sleepiness that threatens your safety while driving.
Difficulty sleeping has lasted more than three months.
You consistently need more than nine hours to feel rested.
Your sleep pattern has changed suddenly with no clear reason.
Assessment or follow-up can be arranged through a remote sleep disorders consultation for those living outside Riyadh.
Why Choose Subat Clinics to Assess Sleep Quality?
We measure sleep quality, not only the number of hours, because in many cases the problem is not sleep quantity.
Fully home-based sleep tests: the patient sleeps in their own bed at their usual time, and results are ready within 3 working days.
The test is read by the consultant themselves, producing a treatment decision rather than a report containing numbers only.
A Saudi team specialized in pulmonary medicine and sleep disorders.
You can review the services and consultations available at Subat Clinics and choose the one that suits your case.
Know Your Sleep Quality, Not Just Your Hours
If you sleep within the normal sleep hours by age and still wake up tired, the table will not explain why. One night of testing in your own bed may help uncover it.
📍 Othman Bin Affan Road, Al Taawun District, Riyadh 12477
🕔 Sunday to Wednesday, 5 – 9 PM
📞 0112011100
💬 WhatsApp: 0505999713
Sources:
Saudi Ministry of Health — Sleep and Sleep Needs by Age
Sleep Medicine in Health and Disease — University Sleep Disorders Center, King Saud University
Mayo Clinic — How Many Hours of Sleep Are Enough?
This content is for health awareness purposes and does not replace a personal medical consultation. Sleep recommendations for children and infants should be followed up with your pediatrician.
Medically reviewed by:
Dr. Ahmed Alruhaimi — Consultant in Pulmonary Medicine and Sleep Medicine, Subat Clinics.
Last reviewed: August 2026.
Frequently Asked Questions
Do naps count within sleep hours?
Yes, the recommended figures cover total sleep across the day. But long or late naps reduce sleep pressure at night, so it is better to keep them to 20 to 30 minutes and before late afternoon.
Can late nights be made up for by sleeping during the day?
Only partly. Daytime sleep is lighter because it runs against the body clock and melatonin release, and it may not give the body the same repair even if the number of hours matches.
Is sleeping too much harmful?
Persistent excessive sleep may be a symptom of another problem, such as depression, an underlying sleep disorder, or a chronic illness. A continuing need for more than nine hours in an adult deserves assessment.
How do I know my child is not sleeping enough?
Signs of insufficient sleep in children differ from adults. They may appear as hyperactivity, poor attention, difficulty waking in the morning, or declining school performance, rather than visible sleepiness.
Are smartwatches accurate at measuring sleep?
Smartwatches give an approximate indication of sleep patterns, but they do not diagnose sleep disorders, because they rely on movement and heart rate and do not measure brain waves or breathing pauses with the same accuracy as sleep tests.
Does a man's sleep need differ from a woman's?
The recommended ranges are similar, but hormonal changes in women, such as pregnancy and menopause, may affect sleep quality and continuity during certain stages.
I sleep only 6 hours and feel fine — is that normal?
A small number of people manage on less than seven hours with no clear effect, but many people get used to sleep deprivation and stop noticing it, while its effect on concentration, health, and daily performance may continue.