Body Mass Index (BMI) estimates whether your weight is in a healthy range relative to your height, using the standard formula weight ÷ height². It's a quick screening tool, not a diagnosis — it doesn't distinguish muscle mass from fat, so athletes and very muscular people often show a higher BMI than their actual body fat would suggest.
Example: someone 5'11" (180cm) and 165 lbs (75kg) falls in the "Normal weight" range on the standard BMI chart (18.5–24.9). Switch between US and Metric units above depending on which measurements you have handy.
Body Mass Index is a numerical value calculated from height and weight used as a screening tool to identify whether a person falls into an underweight, healthy, overweight, or obese category.
Underweight: below 18.5 | Normal weight: 18.5–24.9 | Overweight: 25.0–29.9 | Obese: 30.0 and above. These ranges apply to adults aged 20 and older.
BMI does not account for muscle mass, bone density, or fat distribution. Athletes with high muscle mass may show a high BMI without being obese. Always use BMI alongside other health indicators.
Health risks associated with excess body fat may begin at lower BMI values for South Asian and East Asian populations. Many health organizations recommend using BMI alongside other measurements for accuracy.
Body Mass Index is a numerical value calculated from height and weight, used as a screening tool to identify whether a person falls into an underweight, healthy, overweight, or obese category.
Underweight is below 18.5, normal weight is 18.5-24.9, overweight is 25.0-29.9, and obese is 30.0 and above. These ranges apply to adults aged 20 and older.
BMI does not account for muscle mass, bone density, or fat distribution. Athletes with high muscle mass may show a high BMI without being obese, so BMI should be used alongside other health indicators.
Health risks associated with excess body fat may begin at lower BMI values for South Asian and East Asian populations. Many health organizations recommend using BMI alongside other measurements for accuracy.
Results include your BMI category, a healthy weight range for your height, and your BMI Prime.