BMI Calculator (Body Mass Index)

Calculate your Body Mass Index (BMI) to understand your weight category and overall body composition risk.

Height

Weight

Calculate your Body Mass Index (BMI) to understand your weight category and overall body composition risk.

How BMI Calculator Works & Scientific Formula

Our online BMI Calculator uses clinically validated physiological formulas for high accuracy. Formula: BMI = Weight (kg) / [Height (m)]² | Imperial: BMI = 703 × Weight (lbs) / [Height (in)]²

Scientific Formula & Calculation Logic

This calculator executes clinical formulas recognized in medical and physiological literature:


                        BMI = Weight (kg) / [Height (m)]²  |  Imperial: BMI = 703 × Weight (lbs) / [Height (in)]²

Reference Ranges & Health Categories

Category / Classification	Reference Value / Range	Health Interpretation
• Underweight	< 18.5	Nutritional deficiency risk
• Normal Weight	18.5 – 24.9	Lowest health risk
• Overweight	25.0 – 29.9	Moderate cardiovascular risk
• Obese (Class 1)	30.0 – 34.9	High health risk
• Severely Obese (Class 2+)	≥ 35.0	Very high health risk

Frequently Asked Questions (FAQs)

What is a healthy BMI for adults? ▾

According to the World Health Organization (WHO), a normal and healthy BMI for adults is between 18.5 and 24.9.

Does BMI measure muscle vs fat? ▾

How often should I check my BMI? ▾

BMI Calculator (Body Mass Index)