BMI Calculator
Calculate your Body Mass Index (BMI) in metric or imperial units. Instantly see your BMI value, category, and position on the BMI scale.
Frequently Asked Questions
What is BMI?
Body Mass Index (BMI) is a measure of body fat based on height and weight. It is calculated by dividing weight in kilograms by the square of height in metres (kg/m²).
What are the limitations of BMI?
BMI does not distinguish between muscle and fat mass, so athletes may be classified as overweight despite having low body fat. It also does not account for age, sex, or body composition. Use it as a rough screening tool, not a definitive health measure.
What is a healthy BMI range?
For most adults, a BMI between 18.5 and 24.9 is considered healthy. Below 18.5 is underweight, 25–29.9 is overweight, and 30 or above is classified as obese. Different thresholds may apply for some ethnic groups.