Body Mass Index (BMI) Calculator
Calculate your Body Mass Index (BMI) instantly using your height and weight. A fundamental tool used by healthcare professionals to assess body composition risk.
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Understanding Weight & Health
Body Mass Index (BMI) is a simple numerical measure that uses your height and weight to estimate body fat. While it does not measure body fat directly, research has shown that BMI is moderately correlated with more direct measures of body fat. It is widely used by healthcare providers as a screening tool for possible weight problems in adults.
Why Use BMI?
It is an inexpensive and easy-to-perform method of screening for weight categories that may lead to health problems. It allows for quick comparisons across populations.
Limitations
BMI does not distinguish between muscle mass and fat mass. Athletes with high muscle mass may have a high BMI score despite having low body fat.
The Calculation Formula
METRIC STANDARD
BMI = kg / (height)²
The weight in kilograms is divided by the square of the height in meters. For example, a person who weighs 70kg and is 1.75m tall has a BMI of 22.9.
Clinical Importance
- Assessing Cardiovascular Risk
- Type 2 Diabetes Screening
- Hypertension Monitoring
- Nutritional Status Evaluation
Public Health Standard
The WHO utilizes BMI to track global obesity trends and establish health guidelines for nations. It remains the most widely accepted standard for large-scale health surveys.
Official WHO Weight Categories
BMI Range Weight Status Below 18.5 Underweight 18.5 – 24.9 Normal weight 25.0 – 29.9 Overweight 30.0 and Above Obese Frequently Asked Questions