Adults generally need 7 or more hours of sleep per night for good health, with most adults recommended to get between 7 to 9 hours each night. This amount supports optimal health and helps reduce the risk of adverse health outcomes such as weight gain, diabetes, high blood pressure, heart disease, stroke, and depression. The exact amount can vary depending on personal factors like sleep quality, previous sleep deprivation, pregnancy, and aging. Older adults typically need about the same amount but might experience different sleep patterns. Children, teenagers, and infants require more sleep than adults, with teenagers needing about 8-10 hours and younger children needing even more. For most adults from 18 to 64 years, the guideline is sleeping 7 to 9 hours , while adults older than 65 years may need around 7 to 8 hours of sleep.