What is BMI and why is it important?

BMI (Body Mass Index) is a measure of body fat based on height and weight. It helps assess health risks associated with underweight, overweight, and obesity.

Is this BMI calculator accurate?

Yes, our calculator uses the standard BMI formula (weight in kg ÷ height in m²) recommended by WHO. Results are shown with international classification standards.

BMI Calculator - Calculate Body Mass Index Online

Free BMI calculator to check your body mass index. Calculate BMI for adults and children. Get instant results with WHO classification and health recommendations.

BMI Calculator

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Unit System

Gender

Height (cm)

Weight (kg)

Age (years)

Enter your height and weight to calculate BMI

About BMI Calculator

Body Mass Index (BMI) is a simple calculation using a person's height and weight. The formula is BMI = kg/m² where kg is a person's weight in kilograms and m² is their height in meters squared. BMI indicates whether a person has a healthy body weight for their height.

BMI Categories

Underweight: BMI less than 18.5
Normal weight: BMI 18.5 to 24.9
Overweight: BMI 25 to 29.9
Obesity: BMI 30 or greater

Important Notes

While BMI is a useful screening tool, it does not directly measure body fat or account for muscle mass, bone density, overall body composition, and racial and sex differences. For a comprehensive health assessment, consult with a healthcare provider.

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