BMI Calculator

Knowing your body mass index (BMI) is one of the best ways to establish whether or not you're in a healthy weight range. Use our BMI calculator below to work out your BMI and discover your ideal weight.

NEW: Try this interactive BMI chart especially if you are on the mobile!

Calculate BMI

Metric (kg/cm) Imperial (lb/ft/in)

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How to calculate BMI?

Your weight alone isn't the most reliable indicator of whether or not you're overweight and how many kilos you may need to lose. Body Mass Index (BMI) is a calculation used to estimate your total amount of body fat and determine which category you fall into: underweight, healthy weight, overweight or obese.

BMI Formula

Your BMI is calculated by dividing your body weight in kilograms by your height in meters squared (m2):

BMI = kg /

But why bother calculating. Just enter your details into our calculator and get your BMI. You will be shown the range of your ideal weight too...