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BMI: How to Calculate BMI in Woman and Men

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Adults: (BMI) in woman and men

WOMAN: The body mass index (BMI) is measured as a person's weight in kilogram (kg) divided by her hight (in meters), squared.

The WHO define a BMI 'underweight'; 18.5 to >30.0 as 'obese'

MEN: The body mass index (BMI) is measured as a person's weight in kilogram (kg) divided by his hight (in meters), squared.

The WHO define a BMI 'normal/healthy'; 25.0 to 30.0 as 'obese'

Mean BMI in adult women

Body Mass Index (BMI) is used to define the share of individuals that are underweight, in the ‘healthy’ range, overweight and obese.

In the map here we see the distribution of mean BMI for adult women – aged 18 years and older – across the world. The global mean BMI for women in 2016 was 25 – just on the threshold from the WHO’s ‘healthy’ to ‘overweight’ classification. This has increased from a mean BMI of 22 – in the mid-range of ‘healthy’ – in the 1970s.


Mean BMI in adult men

Body Mass Index (BMI) is used to define the share of individuals that are underweight, in the ‘healthy’ range, overweight and obese.

In the map here we see the distribution of mean BMI for adult men – aged 18 years and older – across the world. The global mean BMI for men in 2016 was 24.5 – just on the threshold from the WHO’s ‘healthy’ to ‘overweight’ classification. This has increased from a mean BMI of 21.7 – in the mid-range of ‘healthy’ – in the 1970s.


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African Data & Trends in Obesity

African Data & Trends in Obesity

Obesity rates are rapidly increasing in the African Region, as in most parts of the world.

Evidence on the causes and effects of obesity and associated NCDs

Evidence on the causes and effects of obesity and associated NCDs

There is a common misconception that obesity and other noncommunicable diseases (NCDs) only occur among the wealthy. 

Key research from across Africa

Key research from across Africa

Strategy for the prevention and control of Obesity in South Africa - 2015 - 2020

Effective policies and interventions

Effective policies and interventions

Act today for a healthier future. HSF supports the World Obesity Federation (WOF) in the initiative to stimulate and support practical actions to address obesity.

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