Body mass index (BMI) is a measure of body fat based on height and weight that applies to both adult men and women. BMI is recognized by the National Institutes of Health (NIH) and The World Health Organization as the best standard to judge obesity. BMI is also one of the most accurate and widely used measurements to determine if extra pounds pose health risks.

According to the National Institute of Health (NIH), your BMI score means the following:

• Underweight: below 18.5
• Normal: 18.5 to 24.9
• Overweight: 25 to 29.9
• Obese: 30 to 39.9
• Extremely obese: 40 and above

Body fat percentage is a often better measure of diet success and overall health than weight. This is a quick method for calculating your body fat percentage.

Even when you are sleeping you are expending energy and burning calories. Your Basal Metabolic Rate is the number of calories that you would burn if you did nothing other than stay in bed all day. BRM is the most important factor in determining your overall metabolic rate and how many calories you need to lose, maintain, or gain weight. BRM Calculator

Ways to increase your BRM:
• Regular exercise, especially cardiovascular
• Increase your muscle to fat ratio
• Avoid Hunger. Depriving yourself of food for long stretches will cause a drop in metabolism. Instead eat smaller, more frequent meals.

* This calculator uses the Harris-Benedict Equation.

Quick estimation of how many calories per day you need to consume to lose, maintain, or gain weight.

* This calculator uses the Harris-Benedict formula.

Measures the number calories burned while running or walking at a given pace and duration.

* This calculator is based on a formula derived from a study of the net energy expenditure for running 1 hour on a horizontal surface. (McArdle, WD et al in Exercise Physiology 3rd Ed., Lea and Febiger eds., 1991).