Body Mass Index is a handy guide to the healthy weight range for your height, used by the government and health professionals. The weight range chart below displays BMI ranges in an easy chart version so you can quickly find which range you are in. Use the weight range chart below to check whether your health is at risk because of your weight.

Use Slimming World's height/weight chart to:

• Check what range you fall in
• Consider your weight management goals
• Track your progress

How to use the weight range chart

Use the Weight Range Chart below to help you set your weight management goals.

Line up your height (vertical) measurement, and then your weight (horizontal) measurement. Where the lines cross is where you are in the weight range.

See the colour key below for more information.

Please note: the point at which someone’s health is at risk due to their weight varies between ethnic groups. It is recommended that Asian (South Asian and Chinese), black African and African Caribbean populations use the area between the dotted lines as an indicator for when their health may be at increased risk due to their weight (see the dark blue range overleaf), and the area to the right of the purple dotted line as an indicator that their health is at greater risk (see purple range). NICE Public Health Guidance PH46

What range am I in?

In this range you are underweight (BMI<18.5)

• Intentionally trying to lose weight to reach and stay within this range can be unhealthy.
• You may not be eating enough food to supply your body with all the nutrients it needs.
• Being underweight can lead to problems such as osteoporosis and anaemia and also affects fertility.

The healthiest weight range (BMI 18.5-25)

• You are at least risk of developing weight-related medical problems.
• Your health may not necessarily benefit from further weight loss.
•  It is important not to aim to go below this range.

In this range you may be at greater risk of developing weight-related health problems (BMI 25-30)

• Losing weight will reduce this risk and could also improve existing health conditions.

In this range your health is at greater risk (BMI >30)

• Losing weight and keeping it off will improve your health and fitness including fertility and menstrual problems  

Please note: If you are a mum-to-be BMI and the weight range chart can be used to look at the range you were in at the start of your pregnancy (at or before your booking appointment). It is not suitable to assess your weight after this point as it becomes inaccurate as you gain weight through your pregnancy. The BMI weight range chart may not be accurate for people with a high muscle mass. If you are under 16 years old the chart is not suitable to assess your weight range.

Discover more about reaching a healthy weight...