Calculator

BMI Calculator

Calculate your Body Mass Index and understand your weight category.

BMI Calculator

Enter your weight and height.

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Formula

BMI = Weight (kg) / Height² (m²)
Weight = Body Weight in Kilograms
Height = Height in Meters
BMI = Body Mass Index

What Is BMI?

Body Mass Index (BMI) is a simple measurement that compares weight and height. It is widely used to estimate whether a person falls within a healthy weight range.

How BMI Is Calculated

BMI is calculated by dividing body weight in kilograms by height in meters squared. The resulting value is used to classify weight status.

BMI Categories Explained

Adults are generally classified as underweight, normal weight, overweight or obese based on their BMI value. These categories help assess potential health risks.

Why BMI Matters

BMI is commonly used by healthcare professionals as a quick screening tool to identify possible weight-related health concerns.

Practical BMI Example

A person weighing 70 kg with a height of 1.75 meters has a BMI of approximately 22.9, which falls within the normal weight category.

Limitations of BMI

BMI does not directly measure body fat. Athletes and individuals with high muscle mass may have elevated BMI values despite having healthy body composition.

BMI and Overall Health

BMI should be considered alongside other health indicators such as waist circumference, body fat percentage, physical activity and medical history.

Using This BMI Calculator

Enter your weight and height to instantly calculate your BMI and identify your weight category.

Frequently Asked Questions

What is a healthy BMI?

For most adults, a BMI between 18.5 and 24.9 is generally considered healthy.

What BMI is considered overweight?

A BMI between 25 and 29.9 is generally classified as overweight.

What BMI is considered obese?

A BMI of 30 or higher is generally classified as obese.

Does BMI measure body fat?

No. BMI estimates weight relative to height but does not directly measure body fat percentage.

Can athletes have a high BMI?

Yes. Athletes often have higher BMI values because muscle weighs more than fat.

Is BMI accurate for everyone?

BMI is useful for most adults but may not accurately reflect body composition in athletes, older adults or certain medical conditions.

Can BMI predict health risks?

BMI can indicate potential risk factors but should not be used as a standalone measure of health.

Should children use BMI calculators?

Children and teenagers use different BMI interpretations based on age and sex.

Can I improve my BMI?

Healthy nutrition, regular exercise and long-term lifestyle changes can help improve BMI values.

Is this BMI calculator free?

Yes. You can use this BMI calculator for free directly in your browser.

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