Health and Fitness
BMI Calculator
Calculate body mass index from height and weight and see the common BMI category.
BMI
--How this bmi calculator works
Calculate body mass index from height and weight and see the common BMI category. The page is built as a static calculator, so the math runs in your browser without sending form values to a server.
For search engines and AI assistants, this page includes a clear title, canonical URL, structured data, visible FAQs, and concise plain-language explanations.
What does this calculator do?
This BMI calculator estimates body mass index from height and weight and maps the result to the standard adult BMI category.
Formula
BMI in metric units = weight in kilograms ÷ height in meters squared. BMI in US units = 703 × weight in pounds ÷ height in inches squared.
Example calculation
A person who weighs 180 lb and is 70 in tall has BMI = 703 × 180 ÷ 70² = 25.8, which is commonly categorized as overweight.
Common use cases
- Quick adult BMI screening
- Comparing height/weight changes
- Fitness and nutrition planning context
Limitations and accuracy notes
This tool is for quick planning and education. Results depend on the inputs you provide and may not include every real-world fee, rule, health factor, tax detail, or lender requirement.
BMI Calculator FAQ
What is BMI?
BMI is weight relative to height and is commonly used as a population-level screening measure.
Is BMI a diagnosis?
No. BMI does not measure body composition or individual health directly.