To work out your BMI:
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. This is your BMI.
If your BMI is 25 or more, you should think about losing weight. Being overweight or obese can increase your risk of health problems.
Your healthcare professional may take other factors into account when assessing if you’re a healthy weight.
Muscle weighs more than fat. Very muscular people, such as heavyweight boxers, weight trainers and athletes, may be a healthy weight even though their BMI is classed as obese.
Your ethnic group can affect your risk of some health conditions. For example, adults of Asian origin may have a higher risk of health problems at BMI levels below 25.
You should not use BMI as a measure if you’re pregnant. Get advice from your midwife if you’re concerned about your weight.
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