How old are kids in US when they take sats?

There is no single answer to this question, as the age at which students in the United States take the SAT varies depending on the school district. However, most students take the SAT in their senior year of high school, which means they are typically between the ages of 17 and 18. Some students may take the SAT earlier, such as in their junior year, while others may take it later, such as after they have graduated from high school.