BMI Calculator

Calculate your Body Mass Index

Your BMI

BMI Categories

Underweight Normal Over Obese

0 18.5 25 30 40+

What is BMI?

Body Mass Index (BMI) is a simple calculation using a person's height and weight. The formula is BMI = kg/m² where kg is a person's weight in kilograms and m² is their height in meters squared.

BMI is a useful screening tool to identify possible weight problems in adults. However, it is not a diagnostic tool. A healthcare provider should perform further assessments to evaluate health risks.

BMI Categories:

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

Limitations of BMI:

BMI does not differentiate between muscle and fat mass. Athletes or muscular individuals may have a high BMI but low body fat. Similarly, older adults may have a normal BMI but higher fat percentage. For a complete health assessment, consider measuring body fat percentage, waist circumference, and consulting healthcare professionals.