Adult BMI calculator
Body mass index (BMI) uses your height and weight to screen for weight categories that may lead to health problems. This calculator is for adults aged 20 and older.
Adult BMI categories
| BMI | Category |
|---|---|
| Below 18.5 | Underweight |
| 18.5 to 24.9 | Healthy weight |
| 25.0 to 29.9 | Overweight |
| 30.0 or higher | Obesity |
Good to know
- BMI is a screening tool, not a diagnosis. It doesn't measure body fat directly or tell you about your overall health.
- It can be misleading for some people, for example very muscular people, older adults, and during pregnancy.
- For children and teens aged 2 to 19, BMI is judged differently, using age- and sex-specific percentiles. Use the CDC child and teen BMI calculator.
- If you're worried about your weight, talk to a doctor. They can look at other measures, such as waist size, blood pressure and blood tests.