A key component of fat loss is understanding your BMR, how many calories you burn at rest along with approximately how many calories you burn with added activity.
This important information will help you create a diet and calorie plan for fat loss.This formula, the Mifflin—St. Jeor, is one of the most accurate formulas we can get on paper. It analyzes your body mass, height, age, and sex.  It calculates daily calorie consumption rate using your complete data along with multipliers needed to account for goals and conditions. This formula also takes sports and other types of activity into account for best results