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To estimate BMI, locate the point on the chart where height and weight intersect. Read the number on the dashed line closest to this point. For example, if you weigh 69 kg and are 173 cm tall, you have a BMI of approximately 23, which is in Normal Weight.
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|
|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.