people in ethnic groups with smaller body stature (eg, Asian ethnic groups).This is because muscle weighs more than fat and the BMI does not take this into consideration. BMI ranges For most adults, an ideal BMI is in the 18.5 to 24.9 range. The BMI calculation divides an adults weight in kilograms by their height in metres squared. adults with higher than normal levels of lean body tissue (muscle mass). The body mass index (BMI) is a measure that uses your height and weight to work out if your weight is healthy.

people, particularly children, with certain health conditions, such as some endocrine or genetic conditions.īMI is also less accurate as an indicator of being overweight in:.women who are more than 10 weeks pregnant.The BMI measurement is not suitable for some people, such as: Who is the BMI calculator not suitable for? Find out more about BMI and what your results mean. However, it is only an estimate and can’t tell you how much of your weight is body fat and how much is muscle mass. Note: BMI is a useful measurement of growth for most people. Your BMI is calculated using your weight (in kilograms) and your height (in metres) and is best done using a calculator. It’s calculated using a statistical ratio of weight to height and applied based on your sex assigned at birth ( 1, 2 ). What is body mass index (BMI)?īMI is a measurement that gives you an idea of whether you're underweight, overweight or a healthy weight for your height. Body mass index (BMI) is an estimate of body fat. Use this body mass index (BMI) calculator to get an idea of whether you're underweight, overweight or a healthy weight for your height.

Body mass index calculator for women