BMI Calculator

Calculate your Body Mass Index quickly and easily.

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Enter Your Details

Client-Side Processing: All BMI calculations happen directly in your browser. No data is sent to our servers, ensuring your privacy.

Select Units:

Metric (kg, cm)Imperial (lbs, inches)

Weight (kg)

Height (cm)

About Body Mass Index (BMI)

The Body Mass Index (BMI) is a simple numerical measure of a person's weight in relation to their height. It is commonly used to classify individuals as underweight, normal weight, overweight, or obese. While it's a widely used screening tool, it's important to remember that BMI is not a diagnostic tool for health, and individual body composition can vary.

BMI Categories:

Underweight: BMI less than 18.5
Normal weight: BMI between 18.5 and 24.9
Overweight: BMI between 25 and 29.9
Obesity: BMI of 30 or greater

Important Considerations:

BMI does not distinguish between fat and muscle mass. Athletes or individuals with high muscle mass may have a high BMI without being overweight. Conversely, older individuals or those who have lost muscle mass may have a normal BMI despite having excess body fat. Consult a healthcare professional for personalized health advice.

This BMI Calculator performs all computations locally within your web browser. **No data you enter is ever transmitted to our servers or stored in any way.** Your privacy and data security are paramount.