What is BMI (Body Mass Index)?

Body Mass Index (BMI) is a widely used screening tool that estimates body fat based on a person's height and weight. It provides a numerical value that categorizes individuals into different weight groups, such as underweight, normal weight, overweight, and obese.

While BMI doesn't directly measure body fat, it is a highly useful indicator for identifying potential health risks associated with being over or underweight. Our BMI Calculator makes it easy to find your score in seconds.

How to Use the BMI Calculator

Our tool supports both Metric (kg/cm) and Imperial (lbs/ft/in) units. To calculate your BMI:

1. Enter Your Weight: Input your current weight in kilograms or pounds.
2. Enter Your Height: Input your height in centimeters or feet and inches.
3. Review Your Category: The calculator will instantly show your BMI score and where you fall on the official health scale.

Understanding BMI Categories

According to the World Health Organization (WHO), BMI results are generally interpreted as follows:

• Underweight: BMI less than 18.5
• Normal weight: BMI 18.5 to 24.9
• Overweight: BMI 25 to 29.9
• Obese: BMI 30 or greater

BMI Calculator FAQs

Is BMI accurate for athletes?

BMI can sometimes be misleading for athletes or bodybuilders with high muscle mass. Because muscle is denser than fat, a very fit person might have a high BMI even if they have low body fat.

What is a "healthy" BMI?

For most adults, a healthy BMI is considered to be in the 18.5 to 24.9 range. However, "healthy" can look different for everyone, and BMI should be used as one of many health indicators.

Does BMI vary by age or gender?

The standard BMI formula is the same for all adults. However, the interpretation of the score can vary slightly for children and teens, where age and gender-specific percentiles are used.