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Body Mass Index (BMI) Calculator

Please enter your age, sex, height and weight (in metric or imperial units) then click: Calculate.

Age:

years and

months (for kids)

sex: male female   (example)

Metric units:

Height: [cm]

Weight: [kg]

Imperial units:

Height: [ft] and [in]

Weight: [lbs]

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What is BMI?

BMI is a number that estimate your body fat. Depend of your body mass index, you can be categorised as: underweight, normal weight, overweight or obesity. It is a good gauge of your risk for diseases that can occur with more fat on the body. It is calculated only from your height and weight. Age and sex are used to compare calculated BMI to other data in this category.

BMI equation:

BMI = Weight / Height² [kg/m²]

Limitations of BMI:

• BMI index don't know your muscular build. It is developed for average person. For example, it may overestimate body fat of person with high muscular build (body builders).
• BMI calculation is same for everybody. Classifying of the BMI is different for kids and teens.

Metric units: [cm]: centimeter, [kg]: kilogram. Imperial units: [ft]: feet, [in]: inch, [lbs]: pounds.

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Example (Average adults):