How many hours of sleep do we really need, anyway?

Some say they sleep well with five hours, others need nine. But is there a right number?

Science shows that most adults need between seven to nine hours of sleep per night to recover energy and maintain health. Teenagers and children, on the other hand, need even more rest, as sleep is essential for growth and development.

More important than the exact number is understanding how you feel when you wake up. If you wake up tired every day, you probably aren't getting enough sleep. If you need a lot of coffee to "get through the day," you might be cutting precious hours of sleep.

Another essential point is sleep quality. It's not enough to count hours if those hours are spent waking up multiple times during the night. A suitable environment, a comfortable mattress, and a consistent routine can make all the difference for those hours of rest to be truly restorative. Listening to your body is the best way to find balance.

See also

• Why women need more sleep
• Do we really sleep less as we age?
• Myths and truths about sleep
• Does sleep schedule really matter?

Explore: Sleep Hygiene Quiz