This is a free online calculator to calculate BMI (body mass index) of both adult men and women. BMI values are age-independent and the same for both males and females.
Height and weight values may be entered either in metric or customary units (feet-inches and pounds). Use the BMI for children calculator to find BMI of children under 18 years of age.
The body mass index is defined as the weight in Kg divided by the square of the height in meters.
BMI = Body weight / (height * height)
The following table summarizes the nutritional status of adults according to BMI values.
| Body Weight | BMI Range |
|---|---|
| Underweight | <18.50 |
| Normal weight | 18.50 - 24.99 |
| Pre-obesity | 25.00 - 29.99 |
| Obesity class I | 30.00 - 34.99 |
| Obesity class II | 35.00 - 39.99 |
| Obesity class III | >=40.00 |
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