CDC example: 5 ft 8 in, 200 lb
- Details
- Height 5 ft 8 in, weight 200 lb.
- Result
- BMI 30.4, Class 1 Obesity
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Result
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How it is calculated
- BMI = weight (kg) ÷ height (m)².
- When feet and pounds are used, BMI = 703 × weight (lb) ÷ height (in)².
- BMI is rounded to one decimal place. The category is decided by the rounded value.
- Normal weight range = the lower and upper BMI limits of the normal category × height (m)².
- BMI is used to check whether body weight is in a suitable range. It is not a diagnosis.
- All calculations are done in your browser. The details you enter are not sent to any server.
Categories as per the CDC adult BMI categories
| Category | BMI |
|---|---|
| Underweight | Less than 18.5 |
| Healthy Weight | 18.5 to less than 25 |
| Overweight | 25 to less than 30 |
| Class 1 Obesity | 30 to less than 35 |
| Class 2 Obesity | 35 to less than 40 |
| Class 3 Obesity (Severe Obesity) | 40 or greater |
These categories apply to adults 20 and older. For children and teens aged 2 to 19, BMI is compared with others of the same age and sex. BMI is a screening measure, not a diagnosis.
Worked examples
6 ft 0 in, 180 lb
- Details
- Height 6 ft 0 in, weight 180 lb.
- Result
- BMI 24.4, Healthy Weight
5 ft 5 in, 150 lb (at the limit)
- Details
- Height 5 ft 5 in, weight 150 lb.
- Result
- BMI 25.0, Overweight
175 cm, 70 kg
- Details
- Height 175 cm, weight 70 kg.
- Result
- BMI 22.9, Healthy Weight
Official sources
Applies to: Current (CDC adult BMI categories).
- Centers for Disease Control and Prevention: Adult BMI Categories
- Centers for Disease Control and Prevention: Body Mass Index: Frequently Asked Questions
Last reviewed on October 26, 2026.
The rules on this page have been checked against the official sources listed above. The result is for reference. The rules and assessment of the concerned authority shall prevail.