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BMI Calculator: Determine Your Body Mass Index

The total cost of obesity to U.S. companies is estimated at $13 billion a year
Credit: Woman on scales image via Shutterstock

The body mass index, or BMI, is a number calculated from a person's weight and height. BMI provides an indicator of body fatness for most people, and is used to screen for weight categories that may lead to health problems.

To use the widget on the left, provide your height and weight, and press calcuate. You can provide your measurements using either English or metric system.

The widget uses a formula for calculating the BMI, which is weight (in kilograms) divided by height (in meters) squared, or alternatively, weight (in pounds) divided by height (in inches) squared and multiplied by a conversion factor of 703. 

Now that you have your BMI, you can determine your weight status category using the following table:

BMI
Weight Status
Below 18.5 Underweight
18.5 – 24.9 Normal
25.0 – 29.9 Overweight
30.0 and Above Obese

BMI is used as a tool to identify possible weight problems for adults, such as higher risk for heart disease, and type 2 diabetes. However, it is important to remember that BMI is not a diagnostic tool. For example, a person may have a high BMI, but to determine whether he is at higher risks for health problems, a doctor would need to perform further assessments, such as evaluations of diet, physical activity, family history.

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