BMI Calculator

BMI is a screening measure that relates body weight to height. Enter consistent height and weight units to get the correct result. Formula: BMI = weight (kg) ÷ height² (m²)

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Measure BMI

BMI is a screening measure that relates body weight to height. Enter consistent height and weight units to get the correct result.

Formula: BMI = weight (kg) ÷ height² (m²)

Enter age, body measurements, dates, or activity choices exactly as requested. These calculators estimate a result from the inputs rather than directly measuring a physical condition.

Repeat the calculation with the same values to confirm the output, then review the unit and method before interpreting the number.

Frequently Asked Questions FAQ

How is BMI calculated?
BMI is calculated using the formula: BMI = weight (kg) / (height (m) * height (m)). The weight is measured in kilograms and the height in meters. The resulting value represents the BMI.
What are the BMI categories?
The BMI categories are used to classify a person's weight status. The common categories include: Underweight: BMI less than 18.5 Normal weight: BMI between 18.5 and 24.9 Overweight: BMI between 25 and 29.9 Obesity (Class I): BMI between 30 and 34.9 Obesity (Class II): BMI between 35 and 39.9 Obesity (Class III): BMI 40 or higher
Can BMI calculations be different for men and women?
The calculation for BMI is the same for both men and women. However, the interpretation of BMI categories may differ slightly due to variations in body composition and fat distribution between genders.

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