Accurate BMI Calculator for Health Assessment
Use our free online BMI calculator to assess your body mass index and understand your weight category. Updated for 2026 standards.
BMI Calculator
Calculate your Body Mass Index (BMI).
Understanding the Body Mass Index (BMI)
The Body Mass Index (BMI) is a simple, widely-used screening tool to gauge whether your weight is healthy in proportion to your height. It provides a numerical value that helps classify a person's weight status as underweight, healthy weight, overweight, or obese. While not a direct measure of body fat, it is a reliable indicator for most adults and is used by healthcare professionals to assess potential weight-related health risks.
How to Use the Calculator
Using our BMI calculator is a straightforward process designed for ease and speed:
- Select Units: Choose between Metric (kilograms, centimeters) or Imperial (pounds, feet, inches) systems based on what you're most comfortable with.
- Enter Your Height and Weight: Carefully input your current height and weight into the designated fields.
- Calculate BMI: Click the "Calculate BMI" button to get your result instantly. The tool will display your BMI score and the corresponding health category.
The Formula Behind BMI
The BMI is calculated using the following standard formulas:
Metric: BMI = weight(kg) / [height(m)]²
Imperial: BMI = 703 × weight(lbs) / [height(in)]²