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BMI Calculator (Body Mass Index)

Calculator Inputs

ResultsLive Estimate

Your Body Mass Index (BMI)24.2
Weight Classificationnormal
Visual Distribution100% Total

Results update automatically as you adjust inputs.

Your Body Mass Index (BMI)24.2

A Body Mass Index (BMI) calculator is an easy-to-use screening tool designed to estimate a person's body fat based on their height and weight. Maintaining a healthy body weight is essential for long-term health, as being underweight or overweight is associated with various chronic medical conditions. By inputting your current weight in kilograms and your height in centimeters, you can instantly determine your exact BMI score. This number serves as a general guide to help categorize adults into different weight ranges: underweight, normal weight, overweight, and obese. While the BMI formula does not directly measure body fat or account for muscle mass or body composition, it remains a widely accepted clinical standard for identifying potential health risks related to body fatness. Understanding your classification allows you to consult with healthcare professionals and adjust your nutrition and exercise plans to achieve a healthier weight classification. Using our tool regularly helps you track your fitness progress over time and stay motivated on your wellness journey.

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Methodology & Formula

This BMI calculator uses the standard World Health Organization formula:

BMI = weight (kg) / [height (m)]²

Weight classifications are mapped as follows:

  • Underweight: BMI < 18.5
  • Normal Weight: BMI between 18.5 and 24.9
  • Overweight: BMI between 25.0 and 29.9
  • Obese: BMI ≥ 30.0

Frequently Asked Questions

What is a healthy BMI range?
For most adults, a healthy BMI range is between 18.5 and 24.9. Scores below 18.5 indicate underweight, while scores above 25 indicate overweight.
Does BMI account for muscle mass?
No, BMI only uses weight and height. Athletes with high muscle mass may be classified as overweight or obese, even if they have very low body fat.
Is BMI the same for men and women?
Yes, the standard BMI formula is identical for adult men and women, although body fat percentages and distribution can vary between genders.