Free BMI Calculator
Enter your height in feet and inches and your weight in pounds.
How to use the BMI Calculator
- Enter your height in feet and inches.
- Enter your weight in pounds.
- Click Calculate BMI to see your index, category, and healthy range.
Good to know
- BMI is a screening measure for adults, not a diagnosis. It can misclassify muscular people and does not account for age, pregnancy, or body composition.
- For a personal assessment, talk to a clinician — this tool is for general information only.
Frequently asked questions
What BMI is considered healthy?
For adults, the CDC categories are: underweight below 18.5, healthy 18.5–24.9, overweight 25–29.9, and obesity 30 and above.
Is BMI different for kids and teens?
Yes — children and teens use percentile charts by age and sex. This calculator uses the adult categories.