Body Mass Index Calculator
How do you work out your Body Mass Index and Waist
Measurement?
You can use the following guides to work these out:
Body Mass Index
Your Body Mass Index (BMI) is a way of finding out if your
weight is putting your health at risk. It works out whether you
are a healthy weight for your height. Please note, if you are a
very muscular person, you might have a high BMI when in fact
your body fat is at a healthy level. This is because muscle
weighs more than fat.
BMI Categories
Normal weight
Overweight
Obese class 1
Obese class 2
Obese class 3
18.5 - 24.9
25 - 29.9
30 - 34.9
35 - 39.9
>40
Waist Measurement Guide
1. To measure your waist, find the bottom of your ribs and
the top of your hips.
2. Measure around your middle at a point mid-way between
these (for many people this will be the tummy button).
3. Use the waist measurements below to see if you have a
high-risk waist measurement. Remember these
measurements refer to adults.
Waist measurement for: Increased risk High risk
European men >94cm (37 inches) >102cm (40 inches)
Asian men >90cm (36 inches)
European and Asian women >80cm (32 inches) >88cm (35
inches)
Waist measurement checks your fat distribution. Carrying too
much weight around your middle can increase your risk of
developing diabetes, heart disease and high blood pressure.
Get your BMI by using the NHS Choices Healthy Weight
Calculator