Adult BMI calculator
Find your body mass index.
Use metric or imperial measurements. The result is a screening estimate for adults aged 18 and over.
Your result will appear here
Enter your height and weight to see your BMI and the standard adult screening range.
Your estimated BMI
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UnderStandard rangeOver30+
How to understand your BMI result
BMI compares weight with height. Standard adult categories use below 18.5, 18.5–24.9, 25–29.9 and 30 or higher as broad screening bands.
BMI has limits. It does not distinguish muscle from fat or account fully for age, ethnicity, pregnancy or body composition. It cannot diagnose a health condition. Read what BMI can—and cannot—tell you.