What is your BMI?
Enter your height and weight to see your body mass index and where it falls on the scale.
Your result updates as you type. This calculator does not save or send your measurements.
Your BMI
Enter your height and weight to see your BMI.
- Underweight
- Under 18.5
- Healthy weight
- 18.5 to under 25
- Overweight
- 25 to under 30
- Obesity
- 30 and over
Weight range at your height
Corresponds to BMI 18.5 to under 25. This is a screening range, not a personal weight goal.
For adults age 20 and older. BMI is a screening measure, not a diagnosis. It does not distinguish muscle from fat and is not suitable for assessing weight during pregnancy. About adult BMI categories
Body mass index, or BMI, compares body weight with height. It is calculated by dividing weight in kilograms by height in meters squared. This calculator handles the conversion automatically when you enter feet, inches, and pounds.
Choose your preferred units, then enter your height and current weight. The result updates as you enter your measurements. This calculator uses the following adult categories:
- Below 18.5: Underweight.
- 18.5 to below 25: Healthy weight.
- 25 to below 30: Overweight.
- 30 or higher: Obesity.
These categories apply to adults aged 20 and older. Children and teenagers require a different assessment that considers age and sex.
BMI provides a useful starting point, but it cannot distinguish muscle from fat or show where fat is carried. A fuller assessment considers factors such as waist measurement, medical history, blood pressure, and other health information.
If a reference weight range appears below your result, it shows the approximate weights corresponding to the standard healthy BMI category at your height. It is a screening reference rather than a personalized target.
The displayed BMI is rounded, while its category uses the full calculation. Near a boundary, you may see a result such as “<25.0,” indicating that the underlying value remains below that threshold.
Use your result to support a broader conversation about health, particularly if it differs from what you expected.