BMI Calculator
Calculate your Body Mass Index from your height and weight — pounds and feet/inches first, metric available too.
How to use it
BMI compares your weight with your height: 703 × lb ÷ (inches)². Adults fall into standard ranges used by the CDC: under 18.5 is underweight, 18.5–24.9 is the healthy range, 25–29.9 is overweight, and 30 or above is the obese range. The result also shows the healthy weight range for your height.
Know its limits
BMI does not measure body fat directly. Muscular people can score “overweight” while being perfectly healthy, and it does not account for age, sex or where fat is carried. Treat it as a screening number to discuss with a doctor — not a diagnosis.
Frequently Asked Questions
Is BMI different for children and teens?
Yes — kids and teens use percentile charts by age and sex. This calculator uses the adult formula.
What is the healthy weight for my height?
The result shows the weight range that corresponds to BMI 18.5–24.9 for your height.
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