How Much Sleep Do You Really Need?

How much sleep do you need? Most healthy adults do best on seven to nine hours of sleep a night. Some people feel fine at the lower end, a few need a bit more, and children and teenagers need considerably more than adults. The right number for you is the amount that lets you wake up reasonably alert and stay that way through the day.

General information only: This article is for general education and is not medical advice. Sleep needs vary from person to person. If you struggle with sleep for weeks, snore heavily, or feel exhausted despite long nights in bed, please talk to a doctor or another qualified health professional.

How much sleep do you need by age?

The answer to how much sleep do you need changes a lot across a lifetime. The ranges below are the commonly cited guidelines from major sleep and health organisations, and they include naps for the youngest groups.

Age group	Typical recommended sleep per 24 hours
Newborns (0-3 months)	14-17 hours
Infants (4-11 months)	12-16 hours
Toddlers (1-2 years)	11-14 hours
Preschoolers (3-5 years)	10-13 hours
School-age children (6-12 years)	9-12 hours
Teenagers (13-18 years)	8-10 hours
Adults (18-64 years)	7-9 hours
Older adults (65+)	7-8 hours

Treat these as sensible starting points, not strict rules. Two healthy adults of the same age can need slightly different amounts.

Why the number is personal

Genetics, health, activity levels and even the season can shift how much rest you need. Someone training for a race, recovering from an illness, or going through a stressful month will often sleep more deeply and for longer than usual.

Pregnancy, for example, commonly makes people want extra rest, especially in the first and third trimesters. Teenagers also tend to feel sleepy later at night and want to wake later in the morning, which is a normal shift in body clock rather than laziness.

Quality counts as well as quantity

Eight hours in bed is not always eight hours of good sleep. Frequent waking, noise, a too-warm room or a late-night screen habit can leave you feeling flat even after a long night. When you think about sleep, look at both how long you sleep and how rested you feel afterwards.

How much sleep do you need? Work it out yourself

If you keep wondering how much sleep do you need, run a simple experiment at home. Pick a stretch of one to two weeks, ideally a quiet period without travel or late social plans, and follow these steps.

1. Choose a regular wake-up time you can keep every day, including weekends.
2. Go to bed when you feel genuinely sleepy, aiming to give yourself around eight hours.
3. Note how long it takes you to fall asleep and how you feel at mid-morning and mid-afternoon.
4. If you fall asleep within a few minutes of getting into bed every night, you may be short of sleep, so try an earlier bedtime.
5. If you lie awake for a long time, you may be going to bed too early, so move bedtime later by 15 minutes.

After a week or two, a pattern usually appears. The bedtime that leaves you waking up without a struggle, and feeling steady until evening, is close to your natural need.

Signs you are not getting enough

One way to answer how much sleep do you need is to notice what happens when you get too little. Common signs include:

• Needing several alarms, or hitting snooze repeatedly
• Feeling very drowsy while reading, watching television or sitting in meetings
• Trouble concentrating or remembering small things
• Feeling more irritable or emotional than usual
• Craving sugary snacks or extra caffeine to get through the afternoon
• Sleeping much longer than usual on days off

Occasional rough nights are normal and usually nothing to worry about. If tiredness lasts for weeks, affects your driving or work, or comes with loud snoring, pauses in breathing or unusual movements at night, see a doctor.

Habits that support better sleep

You cannot force sleep, but you can make it easier to arrive. Small, steady habits tend to help more than dramatic fixes.

• Keep a consistent schedule. A regular wake time anchors your body clock more than a regular bedtime does.
• Get daylight early. Morning light helps your body know when the day begins.
• Watch caffeine timing. Many people find that coffee or strong tea after early afternoon makes it harder to settle at night.
• Wind down. Dim the lights and step away from bright screens for a while before bed. Reading, a warm shower or gentle stretching all work for many people.
• Make the bedroom comfortable. Cool, dark and quiet is a good target.
• Move during the day. Regular activity, such as a daily walk, often helps people sleep more soundly. Our guide to walking for fitness is a gentle place to start.

Stress is one of the most common reasons for a restless night. If your mind races when your head hits the pillow, the ideas in how to reduce stress may be worth trying. And if your evenings are swallowed by your phone, a digital detox can give you a calmer lead-in to bedtime.

Can you catch up on lost sleep?

A long lie-in after a short week can leave you feeling better, but it is not a perfect fix. Sleeping very late on weekends can also push your body clock later and make Sunday night harder. A smaller catch-up, such as an extra hour or an early night or two, usually works better than a marathon sleep.

You can find more everyday wellbeing guides in our health section.

Frequently asked questions

Further reading: Wikipedia overview: Sleep.