What is a BMI Calculator?

BMI stands for Body Mass Index — a simple numerical value calculated from a person's weight and height. It provides a reliable indicator of body fatness for most people and is used worldwide by doctors, nutritionists, and health organisations to screen for weight categories that may lead to health problems. BMI is defined as weight in kilograms divided by height in metres squared (kg/m²).

The World Health Organisation (WHO) defines four categories: Underweight (BMI below 18.5), Normal weight (18.5–24.9), Overweight (25–29.9), and Obese (30 and above). While BMI is a useful screening tool, it does not directly measure body fat or account for muscle mass, bone density, age, or ethnicity — always consult a healthcare professional for a full health assessment.

How to Use the BMI Calculator

1. Choose your unit system: Metric (kg and cm) or Imperial (lb, ft, and inches).
2. أدخل الخاص بك weight و height in the appropriate fields.
3. انقر Calculate BMI.
4. Your BMI value and category (Underweight / Normal / Overweight / Obese) will appear with colour coding.

Why Use Our BMI Calculator?

• مجاني 100% — No cost, no ads injected into results.
• لا يوجد تسجيل — Start calculating immediately without an account.
• القائم على المتصفح — Your health data is processed locally and never transmitted.
• Metric & Imperial — Switch between kg/cm and lb/ft/in with one click.
• WHO Categories — Results are colour-coded using the official WHO BMI classification.

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