Healthy Sleep: How much sleep does one need?
Here is a basic guideline for the average hours of sleep needed over 24 hours per age group.
Infant (0-12 months): 14-18 hours
Toddler (13-36 months): 13 hours (including nap)
Preschooler (37-60 months): 12 hours (including nap)
School-age (6-12 years): 10-11 hours
Adolescent (13-19 years): 9.25 hours
Adult (20 years+): 8.25 hours
Remember, that sleep is the only time of the day that your body has to fully restore itself. At any age, getting enough sleep boosts your immune system. Sleep also helps your nervous system to work properly.
Also, remember that quality of sleep is just as important as quantity. If your sleep is frequently interrupted or cut short, you're not getting quality sleep.