- divide your weight in kilograms (kg) by your height in metres (m)
- then divide the answer by your height again to get your BMI
- if you weigh 70kg and you’re 1.75m tall, divide 70 by 1.75 – the answer is 40
- then divide 40 by 1.75 – the answer is 22.9
- your BMI is 22.9kg/m2
Try the BMI healthy weight calculator to find out your BMI and get personalised weight loss advice.