ClarityHow to use this tool
- Enter weight, height.
- Select Calculate to view the result.
- Check the method and assumptions below before using the result.
Input reference and sample values
Use the units and choices shown for each field. Sample values are provided for practice, not as recommendations.
| Input | Format and units | Sample |
|---|---|---|
| Weight | Numeric value. Unit: kg. Minimum: 0.1. Maximum: 700. | 70 |
| Height | Numeric value. Unit: cm. Minimum: 1. Maximum: 300. | 175 |
Result for these sample inputs
22.8571429 bmi
- Adult screening category
- Healthy weight
- Applies to
- Adults 20 and older
BMI is a screening measure, not a diagnosis. It does not measure body fat directly.
Select Try the example in the form to load these values and calculate them again. This replaces the current form inputs. Compare the result with the method and worked explanation below.
The method, explained
BMI = weight in kilograms ÷ height in meters squared. CDC adult categories: below 18.5, underweight; 18.5 to below 25, healthy weight; 25 to below 30, overweight; 30 or above, obesity.
At 70 kg and 175 cm, BMI is approximately 22.86, within the CDC adult healthy-weight range.
What to keep in mind
For adults aged 20 and older only. BMI does not directly measure body fat and may be misleading during pregnancy or for people with high muscle mass. It is not a diagnosis.
Reference: CDC adult BMI categories
Common questions
Is BMI a measure of body fat?
No. BMI relates weight to height and is a screening measure. Body composition and other health factors need separate assessment.
Can this be used for children?
No. Children and teens need age- and sex-specific growth references rather than these adult ranges.
Methodology maintained by ClarityKit. How these tools are built and checked.