BMI Calculator

Calculate your Body Mass Index (BMI) instantly with our free online calculator. Enter your height and weight in metric or imperial units to get your BMI and weight category.

Unit System

Enter your height and weight to calculate your BMI.

BMI Categories

Underweight

BMI: Under 18.5

May indicate insufficient body weight. Consider consulting a healthcare provider.

Normal Weight

BMI: 18.5 to 24.9

Generally indicates a healthy body weight for most adults.

Overweight

BMI: 25.0 to 29.9

May indicate excess body weight. Consider lifestyle modifications.

Obese

BMI: 30.0 or higher

May indicate significantly excess body weight. Consider consulting a healthcare provider.

Important Note

BMI is a general screening tool and may not be accurate for athletes, elderly people, or during pregnancy. Always consult healthcare providers for proper evaluation of your health status.

About BMI Calculator

The Body Mass Index (BMI) is a simple screening measure that uses your height and weight to determine if you're in a healthy weight range. Our calculator provides instant results and categorizes your BMI according to World Health Organization (WHO) guidelines. Remember that BMI is just one of many indicators of body composition and overall health.

Frequently Asked Questions

What is BMI (Body Mass Index)?
BMI (Body Mass Index) is a numerical value calculated from your weight and height. It's a simple screening tool used to categorize weight status and potential health risks. The formula is: BMI = weight(kg) / height²(m²).
How do I calculate my BMI?
Using our calculator, simply enter your height and weight (in either metric or imperial units), and your BMI will be calculated instantly. The calculator also shows your weight category and provides basic health insights.
What are the BMI categories?
BMI categories are: Underweight (under 18.5), Normal Weight (18.5-24.9), Overweight (25.0-29.9), and Obese (30.0 or higher). These ranges are based on standard WHO guidelines for adults.
Is BMI accurate for everyone?
While BMI is a useful screening tool, it has limitations. It may not be as accurate for athletes, elderly people, or during pregnancy. It also doesn't account for factors like muscle mass, bone density, age, sex, ethnicity, and overall body composition.
Should I make health decisions based on my BMI alone?
No, BMI should not be the only factor in making health decisions. It's best to consult with healthcare providers who can consider other important factors like body composition, lifestyle, medical history, and overall health status.