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Calculate your Body Mass Index (BMI) with this body weight calculator tool.

By calculating your BMI, you will get an indication of whether your weight may be affecting your health. BMI is commonly used by Doctors and health professionals worldwide and is calculated using your weight and height. You have two calculators to choose from – metric and imperial.

*Please note that this BMI Calculator measures the BMI for adults over the age of 18 only.

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How much should I weigh?

When determining your ideal body weight, several factors should be considered. These include age, muscle-fat ratio, height, and bone density. Some people say your Body Mass Index (BMI) is the best way to calculate whether your body weight is ideal. Others say BMI is faulty as it does not take into account muscle mass and suggest using a measurement of waist-hip ratio instead.

What is the formula for BMI?

The official formula for BMI was invented in the 1830’s by Belgian mathematician Lambert Adolphe Jacques Quetelet (1796-1874)


Metric BMI = ( weight (kg) / ( height (m)2 ) )

Imperial BMI = ( weight (lb) / ( height (in)2) ) x 703

Whilst every effort has been made in building this BMI calculator, cannot be held liable for any special, incidental, direct, indirect or consequential damages or monetary losses of any kind arising out of or in connection with the use of this calculator, its results and/or information derived from this web site. This BMI calculator is here purely as a service to you, please use it at your own risk. As each person and body is different, always consult with a certified physician or health professional for advices and guidance prior to making any dramatic changes to your lifestyle.