What is a healthy BMI?

A healthy BMI for adults is between 18.5 and 24.9.

Does BMI depend on age?

BMI interpretation differs for children, but for adults age does not change BMI categories.

Is BMI accurate for athletes?

BMI may overestimate body fat in muscular individuals such as athletes.

BMI Calculator (Advanced)

Calculate your Body Mass Index (BMI) using age, height, and weight. Includes BMI chart, healthy weight range, and personalized weight advice.

Age (years) For adults (18+)

Units

Height (cm)

Weight (kg)

What Is BMI?

Body Mass Index (BMI) is a widely used health metric that estimates body fat based on a person's weight and height. It provides a quick screening tool to classify individuals into weight categories such as underweight, normal weight, overweight, or obese.

BMI by Age

BMI is primarily designed for adults aged 18 and above. For children and teenagers, BMI-for-age percentiles are used instead. This calculator is intended for adult use.

BMI Categories

Underweight: BMI less than 18.5
Normal weight: BMI between 18.5 and 24.9
Overweight: BMI between 25 and 29.9
Obese: BMI 30 or higher

Healthy Weight Range

The healthy weight range is calculated based on a BMI between 18.5 and 24.9 for your specific height.

Limitations of BMI

BMI does not directly measure body fat. Athletes or muscular individuals may have a high BMI despite low body fat. For more accurate health assessment, consider using additional tools.