BMI - Body Mass Index Calculator

Our Body Mass Index Calculator can be used to calculate BMI for men and women using standard or metric inputs for height and weight. Results include descriptions of each BMI range, additional information, and recommended actions.

One variable that BMI calculations fail to consider is lean body mass. It is possible for a healthy, muscular individual with very low body fat to be classified incorrectly using the BMI calculator.
Enter your Height and Weight
Height:  Feet  Inches OR Meters*
Weight:  Pounds  OR  Kilograms 

BMI Calculator Results
Your Body Mass Index
Statistical Comparison
*Based on data and similar categories presented by the World Health Organization and Center for Disease Control.
*BMI Ranges: BMI
Extremely Underweight < 15
Underweight 15 to 18.5
Ideal Healthy Weight 18.5 to 25
Overweight 25 to 30
Extremely Overweight (Obesity) > 30
Your Minimum Healthy Weight
Based on a BMI of 18.5.
 Pounds, or   Kilograms.
Your Maximum Healthy Weight
Based on a BMI of 25.
 Pounds, or   Kilograms.

Further Review of BMI Calculator Results

  • If your calculated BMI is below 15:
    This indicates an extremely low Body Mass Index, with very little or unmeasurable body fat. Malnutrition, health problems, or eating disorders are the most common causes for such a low figure. If you find yourself in this range, you should seek a professional medical, physical, and dietary assessment. You could be at risk of starvation, nutritional deficiencies, osteoporosis, and other serious health conditions.
  • If your BMI calculation is between 15 and 18.5:
    This indicates a very lean Body Mass Index, which means you have a low amount of body fat. If you are an athlete, this can be desirable. If you are not an athlete, this could mean that your weight may be too low. Being underweight can lower your immunity - you should consider gaining weight through good diet and exercise habits, to increase your muscle mass.
  • If your calculated BMI is between 18.5 and 25:
    Great! This indicates a good Body Mass Index with the ideal, healthy amount of body fat. This range is associated with living longest, and the lowest incidence of serious illness. Coincidentally, it seems this ratio is what many individuals perceive to be the most aesthetically pleasing as well.
  • If your BMI is calculated between 25 and 30:
    This indicates that you are overweight, and have too much body fat. You are at increased risk for a variety of illnesses at your present weight. You should attempt to find ways to lower your Body Mass Index and the amount of body fat by changing your eating habits and exercising more.
  • If your BMI calculation is over 30:
    This is a very high Body Mass Index, with an extreme excess of body fat that indicates an unhealthy condition. This BMI range is classified by international health organizations as 'obese'. You are at risk for heart disease, diabetes, high blood pressure, gall bladder disease, some cancers, and an increased risk of death from all causes. *phew* You should consult with a physician plus consider changing your diet and starting an exercise regime to lose those pounds.

Click here to view a BMI Weight Chart