hi guys in this video i explained everything about bmi and bmr Body Mass Index Your BMI is an indirect measure of your body composition — or how much body fat you have. Although BMI doesn’t measure body fat directly, it uses your weight and height to determine whether you’re classified as underweight, normal weight, overweight or obese. This measurement correlates moderately well with other measurements of body fat such as skinfold measurements and underwater weighing, according to the Centers for Disease Control and Prevention. BMI is measured by dividing your weight in pounds by the square of your height in inches, then multiplying by 703. The equation looks like this: BMI = (weight / height x height) x 703. If you’re a woman who is 125 pounds and 5 feet 4 inches, your BMI = (125 / 64 x 64) x 703 = 21.4. This BMI puts you in the normal weight range. A BMI below 18.5 indicates that you’re underweight; a BMI between 18.5 and 24.9 classifies you as a normal weight; a BMI between 25 and 29.9 puts you in the overweight category; a BMI of 30 or above classifies you as obese. Basal Metabolic Rate Your BMR is the number of calories your body burns at rest to do basic functions like breathing, digesting, keeping your heart beating and all the other physiological tasks that keep you alive. Your BMR is partly determined by genetics, but other factors, like your body composition and activity level, may also have an effect on your BMR. There are equations used to determine your BMR, and they differ based on whether you’re a man or a woman. A woman can determine her BMR by plugging her stats into the Harris-Benedict equation: 655 + (4.35 x weight in pounds) + (4.7 x height in inches) – (4.7 x age in years). The equation for a man to calculate his BMR is as follows: 66 + (6.23 x weight in pounds) + (12.7 x height in inches) – (6.8 x age in years).