BMI Calculator
Calculate your Body Mass Index and explore your BMI category using your height and weight.
Enter your measurements
BMI is a screening measure, not a diagnosis. It does not directly measure body fat or overall health.
What Is Body Mass Index (BMI)?
Body Mass Index (BMI) is a screening measurement calculated from a person's weight and height. The MWN365 BMI calculator helps you estimate your BMI quickly using metric or imperial measurements. BMI can be one part of a general health assessment, but it cannot determine your health on its own.
How Is BMI Calculated?
For adults, BMI is calculated by dividing weight in kilograms by height in metres squared.
BMI = weight (kg) ÷ height (m)²
For example, a person weighing 70 kg with a height of 1.75 m has a BMI of approximately 22.9.
Adult BMI Categories
| Adult BMI | Category |
|---|---|
| Below 18.5 | Underweight |
| 18.5–24.9 | Healthy weight range |
| 25.0–29.9 | Overweight |
| 30.0 and above | Obesity range |
These standard categories are intended for adults aged 20 and older. BMI is interpreted differently for children and teenagers, where age and sex-specific growth charts are used.
What Is a Healthy Weight Range?
For adults, a BMI between 18.5 and 24.9 is commonly used as a reference range. The weight associated with that range depends on height. Individual factors such as muscle mass, age, pregnancy, and medical history also matter.
Is BMI a Complete Measure of Health?
No. BMI is a convenient screening tool, but it does not distinguish muscle from fat or show where body fat is stored. A healthcare professional can interpret BMI alongside other information, such as blood pressure, medical history, and laboratory results.
Frequently Asked Questions
Is this BMI calculator free?
Yes. The MWN365 BMI calculator is free to use in your browser.
Can I calculate BMI in pounds and feet?
Yes. Select Imperial mode and enter your weight in pounds and height in feet and inches.
Is adult BMI suitable for children?
Adult BMI categories should not be used to interpret children's BMI. Children and teenagers need age- and sex-specific BMI percentiles assessed using appropriate growth charts.
Does BMI diagnose a medical condition?
No. BMI is a screening measure and should not be used alone to diagnose a health condition.
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