Body Mass Index (BMI) Nomogram
This BMI nomogram is not intended for use with:
- those under 18 years of age,
- and pregnant and lactating women.
Visit the Question and Answer (Q & A) section for more information about weight classification and answers to questions about weight and health.
You can also calculate your BMI using this formula:
BMI = weight(kg)/height(m)2
| Classification | BMI Category (kg/m2) | Risk of developing health problems |
|---|---|---|
| Underweight | < 18.5 | Increased |
| Normal Weight | 18.5 - 24.9 | Least |
| Overweight | 25.0 - 29.9 | Increased |
| Obese class I | 30.0 - 34.9 | High |
| Obese class II | 35.0 - 39.9 | Very high |
| Obese class III | >= 40.0 | Extremely high |
Note: For persons 65 years and older the 'normal' range may begin slightly above BMI 18.5 and extend into the 'overweight' range.
Source: Health Canada. Canadian Guidelines for Body Weight Classification in Adults. Ottawa: Minister of Public Works and Government Services Canada; 2003.
To clarify risk for each individual, other factors such as lifestyle habits, fitness level, and presence or absence of other health risk conditions also need to be considered.