BMI Calculator
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Calculate your Body Mass Index in metric or imperial units and see which BMI category you fall into.
Calculate your Body Mass Index in metric or imperial units and see which BMI category you fall into.
Body Mass Index (BMI) is a measure of body fat based on height and weight. It is used by health professionals worldwide as a quick screening tool to categorise weight status. While BMI is a useful indicator, it does not directly measure body fat and does not account for factors such as muscle mass, bone density, or age. Always consult a healthcare professional for personalised health advice.
Metric: BMI = Weight (kg) ÷ Height (m)²
Imperial: BMI = (Weight (lbs) × 703) ÷ Height (inches)²
Is BMI accurate?
BMI is a useful population-level screening tool but has limitations for individuals. It can overestimate fatness in muscular people and underestimate it in those with low muscle mass. It is best used alongside other health indicators.
What is a healthy BMI?
For most adults, a BMI between 18.5 and 24.9 is considered healthy. However, healthy ranges can vary slightly by ethnicity — for example, health risks may begin at lower BMI values in people of Asian heritage.
Does BMI apply to children?
BMI is calculated differently for children and teens using age and sex-specific percentile charts. This calculator is intended for adults aged 18 and over.