How to Calculate BMI - Free BMI Calculator Guide

Body Mass Index (BMI) is a simple measure used to estimate body fat based on height and weight. Our free BMI calculator helps you determine your BMI quickly and easily.

What is BMI?

BMI is calculated by dividing your weight in kilograms by the square of your height in meters. It provides a general indicator of whether you're underweight, normal weight, overweight, or obese.

How to Calculate Your BMI

1. Visit our BMI Calculator
2. Enter your height (in feet/inches or centimeters)
3. Enter your weight (in pounds or kilograms)
4. Click "Calculate BMI"
5. Review your results and BMI category

BMI Categories

• Underweight: BMI below 18.5
• Normal Weight: BMI 18.5 to 24.9
• Overweight: BMI 25 to 29.9
• Obese: BMI 30 or higher

Important Notes

• BMI is a screening tool, not a diagnostic measure
• It doesn't account for muscle mass, bone density, or body composition
• Consult a healthcare professional for personalized health advice
• BMI may not be accurate for athletes or elderly individuals

Our BMI calculator is free to use and provides instant results with no registration required.