BMI Calculator
Body Mass Index (BMI) is a quick screening measure of body fat based on height and weight. Enter your height and weight to see your BMI, weight category and healthy range.
Your BMI
How to use
- Choose metric (cm/kg) or imperial (ft-in/lb) units.
- Enter your height and weight.
- Read your BMI, its category and your healthy weight range.
Frequently asked questions
What do the BMI categories mean?
The World Health Organization classes BMI below 18.5 as underweight, 18.5–24.9 as normal, 25–29.9 as overweight and 30 or above as obese. BMI is a screening tool, not a diagnosis of body fat or health.
Is BMI accurate for athletes?
BMI does not distinguish muscle from fat, so very muscular people can appear "overweight". Athletes should treat the result as a rough guide only.
Is BMI different for men and women?
The standard World Health Organization ranges are the same for adult men and women. Children and teenagers need age- and sex-specific percentile charts instead, so this tool is intended for adults.
Can I use BMI during pregnancy?
No — pregnancy changes normal weight patterns, so BMI is not a meaningful measure during that time. Doctors use dedicated pregnancy weight-gain ranges instead.