BMR and Weight Loss

The BMR formula uses the variables of height, weight, age and gender to calculate the Basal Metabolic Rate (BMR). This is more accurate than calculating calorie needs based on body weight alone. The only factor it omits is lean body mass and thus the ratio of muscle-to-fat a body has. Remember, leaner bodies need more calories than less leaner ones. Therefore, this equation will be very accurate in all but the very muscular (will underestimate calorie needs) and the very fat (will over-estimate calorie needs).

One pound is equivalent to 3,500 calories. Considering the example, if the person burned approximately 2,000 calories when at rest, he could potentially lose just over half a pound if he were to do nothing all day and not eat. While this may work for one day, it is not a recommended solution for weight loss. If weight loss is your goal, a regular exercise regimen and healthy caloric intake will be the best way to achieve what you’re after. If your body is neglected of nutrients and calories, it will eventually go into starvation mode and hang on to the fat and weight that it does have for fear that it will not be fueled adequately. If you are having trouble losing weight, visit your doctor or a nutritionist for a specialized program tailored to your needs.

English BMR Formula (Imperial)

Women: BMR = 655 + (4.35 * weight in pounds) + (4.7 * height in inches) – (4.7 * age in years)
Men: BMR = 66 + (6.23 * weight in pounds) + (12.7 * height in inches) – (6.8 * age in years)

Metric BMR Formula

Women: BMR = 655 + (9.6 * weight in kg) + (1.8 * height in cm) – (4.7 * age in years)
Men: BMR = 66 + (13.7 * weight in kg) + (5 * height in cm) – (6.8 * age in years)