How BMI is calculated
BMI compares weight to height. In metric units, BMI equals kilograms divided by height in meters squared. In US units, BMI equals pounds divided by inches squared, multiplied by 703.
Free health calculator
BMI Calculator
Calculate body mass index, see a general BMI category, and estimate a healthy weight range for your height.
- US and metric units
- BMI category
- Healthy weight range
- Instant results
BMI result
Body mass index
Overweight
25.1
- Healthy BMI range
- 18.5 to 24.9
- Healthy weight range
- 128.9 lb to 173.6 lb
- Entered height
- 5 ft 10.0 in
- Entered weight
- 175.0 lb
- Category note
- BMI is above the standard healthy range.
Estimate only. This calculator is not medical advice.
What BMI categories mean
Common adult BMI categories are underweight below 18.5, healthy weight from 18.5 to 24.9, overweight from 25 to 29.9, and obesity at 30 or higher.
When BMI may be less useful
BMI does not distinguish muscle, fat, bone, age, pregnancy, athletic build, or body-fat distribution. Use it as a general screening estimate, not a diagnosis.