Body mass index, or BMI, is a measure of body size. It combines a person’s weight with their height. The results of a BMI measurement can give an idea about whether a person has the correct weight for their height.
BMI calculation is based on simple formula using person's weight and height. The formula for BMI = kg/m2 where kg is person's weight in kilograms and m2 is their height in meters squared. In simplified format it would be
BMI = (Weight in Kilograms)/(Height in meters * Height in meters)
For USC Units: The formula for BMI = 703*lbs/in2 where lbs is person's weight in Pounds and in2 is their height in inches squared. In simplified format it would be
BMI = 703*(Weight in Pounds)/(Height in inches * Height in inches)
For example if person's weight is 55kg and height is 160cm then BMI = 55/(1.60 * 1.60) = 21.48
BMI calculator indicate whether person falls under healthy weight, underweight or overweight. If person's BMI is out of healthy range, their health risk may significantly increases.
BMI : weight status
- Severe Thinness: < 16
- Moderate Thinness: 16 - 17
- Mild Thinness: 17 - 18.5
- Normal: 18.5 - 25
- Overweight: 25 - 30
- Obese Class I: 30 - 35
- Obese Class II: 35 - 40
- Obese Class III: > 40
See the open issues for a list of proposed features (and known issues).
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