Your body mass index (BMI) can usually give you a good idea of whether you’re a healthy weight for your height. Our BMI calculator can tell you what the ideal weight is for you. It is best to look at your BMI together with your waist-to-height ratio to see whether your weight affects your health.
See our section on how to find out your ideal weight for more details.
You can work out your body mass index (BMI) and see whether it is healthy using our BMI calculator. The categories for having a healthy BMI or being overweight or obese are the same for adults of all ages. They can be different for different ethnic groups, though. See our what is a healthy weight section to find out more.
Body mass index (BMI) isn’t a very accurate way of assessing weight in certain groups of people. If you’re very muscular, this can give you a high BMI, even if you have little body fat. It can be more useful to look at your waist-to-height ratio. For more information, see our section on what is a healthy weight.
If you need to lose weight, it’s best to do so gradually. You can do this by reducing your calorie intake and increasing how much activity you do. Aim for a weight loss of around 0.5 to 1kg (1 to 2lb) a week. See our reaching a healthy weight section for more information.
Your metabolism tends to slow down as you get older. Your energy requirements are also usually lower than when you were younger (you need fewer calories from food). If you carry on eating the same amount of food, this means you may put on weight. See our section on reasons for weight gain or loss to find out more.
Your waist-to-height ratio measures how your waist circumference compares to your height. It’s good to aim for a waist-to-height ratio of below 0.5. This means your waist should be no more than half your height. You can find out how to calculate your waist-to-height ratio in our section on what is a healthy weight.
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