Check your BMI with a BMI calculator
The Body Mass Index (BMI) classifies underweight, overweight, and obesity in adults based on their height and weight.
Being underweight could be a sign you're not eating enough or that you may be ill.
If you're underweight, contact your doctor for further evaluation.
*This BMI calculator is not applicable if you are below 20 years old. BMI is interpreted differently for children and teens, even though it is calculated using the same formula as adult BMI. Please consult with your healthcare provider for BMI information for under 20s.
|Obese||30 and above|
|Class III||40 and above|
*This BMI calculator is for adults 20 years or older. Talk to your doctor about your BMI if you're under the age of 20.
If your BMI shows that you're in the overweight or obese range, it may be time to make changes so that you can be at a healthier weight. Many things can affect your weight, so you can also try to manage it in different ways. Click on an item below to see what you can do to make a change today.
There is no perfect diet for losing weight. But there are scientifically proven ways of eating that can help you manage weight and prevent the weight from coming back. Focus on managing a healthy weight instead of going to extremes in limiting how much you eat. Here are some examples of diets for obesity treatment:
Learn more about starting healthier ways of eating and choosing foods for better weight control here.
There are many reasons why we gain and manage weight and sometimes, they have to do with how we feel.
Some people use food to cope with difficult situations and soothe their feelings. Eating to feel better is called emotional eating - and it's the reason why we sometimes need psychological support instead of diet advice. Get a better understanding of how feelings play a big role in managing weight here.
Stress can also change the way that you eat and put you at more risk of developing obesity. Learning to manage the stress in your life is one strategy you can also include in your weight management plan. Get 8 tips for managing your stress and your weight.
Regular exercise is very important for losing and managing your weight. To make sure that your obesity weight loss programme is as effective as possible, consider adding aerobic and resistance exercises to your routine. You should also move more in general.
Find tips for getting a good start on a new exercise programme here.
Getting too little sleep can affect your hormones, which can then affect how and what you eat. When you sleep better, you're better able to make healthy choices and resist tempting foods. Try these tips to improve your sleeping habits:
Learn more about getting the sleep your body and mind need here.
Living with overweight or obesity is associated with an increased risk of mortality and other diseases or conditions. Generally, the higher your BMI, the greater the chance of developing other chronic obesity-related diseases, including:
BMI is a good way to check your risk of diseases related to body fat. Living with overweight or obesity is associated with an increased risk of mortality and other diseases or conditions. Generally, the higher your BMI, the greater the chance of developing other chronic obesity-related diseases, including:
BMI is a simple and objective measurement, but it can be misleading in certain cases and for some groups of people. Research has shown that BMI is less accurate in predicting the risk of disease in people who are older, athletes, those who are tall or short, and those with more muscular body types. For example, elite athletes or bodybuilders have more muscle and weigh more, which makes their BMI higher.
BMI also doesn't take into account:
It's important to remember that living with obesity doesn't necessarily mean you're unhealthy, just as being at a ‘normal’ weight doesn't mean you're healthy. Your BMI doesn't define you, but knowing and understanding your BMI can be a powerful tool for taking charge of your own health.
Regardless of your BMI, healthcare professionals recommend having a healthy diet and lifestyle. Talk to your doctor about your weight and health and evaluate what actions may be needed.
Talk to your weight management provider about treatment options that could prevent the weight you lose from coming back.