Free Online BMI Calculator
The Versatools BMI Calculator instantly computes your Body Mass Index from your height and weight, and shows you which health category you fall into. Supporting both metric and imperial measurements, our calculator makes it easy to understand your BMI regardless of which unit system you use.
What is BMI?
Body Mass Index (BMI) is a numerical value calculated from a person's weight and height. It provides a simple screening tool for weight categories that may lead to health problems. BMI is calculated as weight in kilograms divided by height in meters squared (kg/m²). For imperial measurements, the formula is weight in pounds divided by height in inches squared, multiplied by 703.
Understanding BMI Categories
A BMI under 18.5 is classified as Underweight, suggesting insufficient body weight for your height. A BMI between 18.5 and 24.9 is Normal weight, generally associated with good health outcomes. A BMI between 25 and 29.9 is Overweight, indicating excess body weight that may increase health risks. A BMI of 30 or above is classified as Obese, associated with increased risk of various health conditions. BMI is a screening tool only and should be interpreted alongside other health indicators.