Can your bmr a guaranteed number of calories you burn a day?

Simply complicated: BMR is the minimum number of calories needed simply to exist. It includes basic respiration, metabolism, etc. Merely to live. However, humans, walk, talk, digest, type, and this adds additional caloric requirements to what we need. Because these calculations are very inexact, the BMR is usually used to assure a rough baseline from which to start looking at what we need to do what we need to do.