So, BMR, or Basal Metabolic Rate, is basically the number of calories your body needs every day to handle the essentials—like breathing, circulating blood, and keeping your body temperature steady. In simple terms, it’s the minimum energy your body needs to keep you alive while you’re at rest.

Figuring out your BMR is a great starting point if you're trying to figure out how many calories you should eat each day. Once you know your BMR, you'll get a good sense of how many calories your body burns just to maintain basic functions. From there, you can adjust your calorie intake depending on how active you are and what your fitness goals are.