The amount of sleep a person needs varies by age and individual factors. For example, adults typically require 7-9 hours of sleep per night, while teenagers may need 8-10 hours due to their developmental stage. Children and infants require even more sleep to support their rapid growth and development. It's important to listen to your body and adjust your sleep schedule to meet your personal needs, as some people may feel fully rested with slightly less or more sleep than the average recommendation.