What this result means
BMI relates body weight to height. The adult categories displayed here use the CDC reference thresholds. Your result does not establish a diagnosis or measure your fitness.
How to measure
Measure height without shoes on a level surface. Use a reliable scale for weight and check the units before calculating. In imperial mode, enter feet and the remaining inches separately.
What comes next
Use the chart and formula guides to understand the calculation. Your medical history, muscle mass and other health measures are also relevant. A clinician can interpret these together.
| Category | BMI range |
|---|---|
| Underweight | < 18.5 |
| Healthy weight | 18.5 – < 25 |
| Overweight | 25 – < 30 |
| Obesity — class 1 | 30 – < 35 |
| Obesity — class 2 | 35 – < 40 |
| Obesity — class 3 | ≥ 40 |
Frequently asked questions
Is BMI calculated differently for men and women?
The standard adult formula and categories shown here are the same. Sex, age, muscle mass and other factors may still matter in a broader health assessment.
Is the reference interval an ideal weight?
No. It is the mathematical interval associated with BMI 18.5 to below 25 for the entered height. It is not an individual goal.
Are my height and weight stored?
No. Measurements exist only in the current page. Refreshing or changing language restores example values. Only theme and unit preferences may be saved in your browser.
Sources
- CDC — Adult BMI categories ↗
- CDC — BMI questions and formulas ↗
- NHS — Adult BMI: eligibility and limitations ↗
Sources checked: