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BMI Calculator

WHO BMI Categories:

Underweight< 18.5
Normal18.5 – 24.9
Overweight25 – 29.9
Obese≥ 30
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About Body Mass Index (BMI) Calculator

Your Body Mass Index (BMI) is a simple, universally recognized measurement that uses your height and weight to determine if you are at a healthy body weight. Medical professionals and the World Health Organization (WHO) rely on BMI as a standard screening tool to identify potential health risks associated with being underweight, overweight, or obese.

BMI = Weight in Kilograms ÷ (Height in Meters × Height in Meters)
  • Get an instant BMI calculation with a visual color-coded gauge
  • Instantly see your official World Health Organization (WHO) category
  • Supports metric units (centimeters and kilograms)
  • Designed for adult men and women aged 18 to 65
  • Fast, secure, and processes entirely on your device

🔒 All calculations are performed locally on your device. No data is sent to any server.

❓ Frequently Asked Questions

What is a healthy BMI range?▾
A healthy BMI is between 18.5 and 24.9 according to the World Health Organization (WHO). Below 18.5 is considered underweight, 25-29.9 is overweight, and 30+ is classified as obese.
Is BMI accurate for athletes?▾
BMI does not distinguish between muscle mass and fat mass. Athletes with significant muscle may have a high BMI but low body fat. In these cases, supplementary metrics like body fat percentage or LBM (Lean Body Mass) are recommended.
Does this tool store my health data?▾
No. All calculations are performed entirely within your browser using JavaScript. Your height, weight, and results are never transmitted to any server or stored anywhere.

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