Body Mass Index (BMI)

What is BMI?

Body mass index (BMI) is a simple index of weight-for-height that is commonly used in classifying overweight and obesity.

How to calculate BMI

BMI is calculated by dividing weight in kilograms by height in metres squared.

For example, if you are 1.65m tall and weigh 85kg: weight / height squared = 85 / 1.65 x 1.65 = 85 / 2.72 = 31.25. Then your BMI would be 31.25.

Use Health24's BMI Calculator

What your BMI means

  • BMI between 18 and 25: Normal weight
  • BMI between 25 and 30: Overweight
  • BMI greater than 30: Obese
We live in a world where facts and fiction get blurred
In times of uncertainty you need journalism you can trust. For only R75 per month, you have access to a world of in-depth analyses, investigative journalism, top opinions and a range of features. Journalism strengthens democracy. Invest in the future today.
Subscribe to News24
Voting Booth
Have you entered our Health of the Nation survey?
Please select an option Oops! Something went wrong, please try again later.
Results
Yes
32% - 9427 votes
No
68% - 19892 votes
Vote