How much sleep do we really need? It seems like a simple question, but the answer is not as straightforward as we might think. The amount of sleep a person needs can vary based on age, lifestyle, and individual differences. As we go through life, our sleep needs change. Babies generally need around 14-17 hours a day, teenagers require about 8-10 hours, and adults typically need 7-9 hours to function at their best. However, it’s important to note that these are just general guidelines, and each person may have their own specific sleep requirements.