Health · Body
BMI Calculator
Find your body mass index in metric or imperial units, its standard adult category, and the weight range that matches a BMI of 18.5–24.9 for your height.
Your result
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How BMI is calculated
Imperial: BMI = 703 × weight (lb) ÷ height (in)² Standard adult categories: under 18.5 underweight · 18.5–24.9 healthy weight · 25–29.9 overweight · 30 and over obesity.
Worked example
What BMI can and can't tell you
BMI is a quick screening number based only on height and weight. It doesn't measure body fat directly, and it doesn't account for muscle, bone density, age, sex or ethnicity. Athletes may have a high BMI with little body fat, and older adults may have a normal BMI with less muscle. For children and teens, BMI is compared to growth charts by age and sex, so this calculator isn't designed for them.
Is my BMI category a diagnosis?
No. It's a screening tool. A doctor or other health professional can look at the fuller picture, such as waist size, blood pressure and lab results.
For general information only, not medical advice. Talk with a health professional about your own health.