For adults
These category ranges are intended for most adults age 20 and older. Children and teens use age- and sex-specific percentiles.
Free Health Calculator
Calculate your BMI in seconds.
Use US or metric measurements to estimate body mass index and see where the result falls within standard adult BMI categories.
0.0—
UnderweightHealthyOverweightObesity
Standard healthy-weight range for this height—
BMI is a screening measurement, not a diagnosis. It does not directly measure body fat, muscle mass, or overall health.
Below 18.5Underweight
18.5–24.9Healthy weight
25.0–29.9Overweight
30.0+Obesity range
One piece of context
Fitness level, body composition, health history, waist measurement, and other factors can provide important context beyond BMI.
Discuss concerns professionally
A qualified healthcare professional can interpret your measurements and health risks more accurately than a calculator alone.