Comprehensive Body Mass Index (BMI) Calculator and Health Assessment Tool
BMI calculator calculates your BMI value and the corresponding weight status.
How to calculate BMI
Calculate BMI in metric units
The BMI (Body Mass Index) in (kg/m<sup>2</sup>) is calculated as the mass (kilograms) divided by the height (meters) squared:
BMI(kg/m2) =
mass(kg)height2(m)
Calculate BMI in US units
The BMI (Body Mass Index) in (kg/m<sup>2</sup>) is calculated as the mass (lbs) divided by the height (inches) squared, all multiplied by 703:
BMI(kg/m2) =
mass(lb)height2(in)
× 703BMI table for adults
This is the recommended BMI table of adults for reference, applied for both men and women aged 20 or older.
| Classification | BMI Range - kg/m2 |
|---|---|
| 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 |
BMI table applied for children and teenagers, aged 2-20
This is the BMI table applied for children and teenagers from 2 to 20 years old.
| Classification | BMI Range - kg/m2 |
|---|---|
| Underweight | < 5% |
| Healthy weight | 5% - 85% |
| At risk of overweight | 85% - 95% |
| Overweight | > 95% |