How to use the BMI Calculator
Enter weight in pounds and height in feet and inches. BMI is an adult screening measure and is not a diagnosis. Enter the requested measurements carefully and use consistent units. Health calculators provide general estimates from population-based formulas; they are not medical tests and should not replace advice from a qualified professional.
What this calculator does
Calculate body mass index from weight and height. It is intended to make the calculation transparent and repeatable: you provide the known values, the calculator applies the relevant relationship, and the result is shown with the units or labels used by the tool.
When this tool is useful
Use the BMI Calculator when you need a quick, repeatable check and already have the inputs requested by the page. It is useful for comparing scenarios, checking hand calculations, planning a task, or understanding how changing one input affects the result.
How the calculation works
BMI is weight in kilograms divided by height in meters squared. Unit conversions are applied when needed.
Practical example
For example, enter a height and weight to calculate BMI, then treat the result as a screening number rather than a diagnosis.
Things to keep in mind
- These results are general estimates, not diagnoses or individualized treatment recommendations.
- Body composition, age, pregnancy, medical conditions, athletic training, and other factors can make population formulas less representative for an individual.
- Use the result as one data point and consult a qualified professional when health decisions depend on it.