BMI Calculator

Here's an Easy Way to work out your Body Mass Index

Here's the sum that is behind any BMI calculator to work out body mass index. Just follow these three steps:

1. Take your height in metres (e.g. 1.68) and multiply the figure by itself (e.g. 1.68 x 1.68 = 2.82)

2. Measure your weight in kilograms (e.g. 65 kg)

3. Divide the weight by the height squared (the answer to Q1) (e.g. 65/2.82 = 23)

Here's another example:

You might be 1.6 m (5ft 3in) tall and weigh 75 kg (165lbs or 11st 11lb). The equation for this is:

1.6 x 1.6 = 2.56. BMI would be 75 divided by 2.56 = 29.3

Online BMI calculator

Choose an online tool if you want a tool for calculating BMI automatically. For instance, if you have a few people who you want to get a reading for, it might be quicker to use one of these.

E.g. the BBC's BMI calculator . Put in the height and weight and let the calculator do the rest.

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