BMI (Body Mass Index) is a value derived from a person's weight in kilograms divided by the square of height in meters. BMI is a simple measure used to assess a person's body composition and helps in evaluating health risks.

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BMI Calculator

Calculate your Body Mass Index (BMI) to determine if your weight is appropriate for your health. Supports both metric and imperial systems.

Enter Your Measurements

Measurement System

Metric (cm, kg) Imperial (in, lb)

Height

Weight

Age

Gender

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Your BMI Result

Normal

Underweight

Normal

Overweight

Obese

Interpretation

Enter your information to calculate your BMI.

Frequently Asked Questions

What is BMI?

Body Mass Index (BMI) is a value calculated by dividing your weight in kilograms by the square of your height in meters. This value is used to assess whether your body weight is in a healthy range for your height.

How is BMI Calculated?

Metric Formula: BMI = Weight (kg) / (Height (m))²
Imperial Formula: BMI = [Weight (lb) / (Height (in))²] × 703

BMI Categories

Category	BMI Range	Health Risk
Underweight	Below 18.5	Increased risk for some health issues
Normal weight	18.5 to 24.9	Lowest risk for health problems
Overweight	25.0 to 29.9	Increased risk for heart disease, stroke, etc.
Obese	30.0 and above	High risk for health problems

How is BMI calculated?

What are the BMI categories?

What are the limitations of BMI measurement?

BMI Limitations

While BMI is a useful reference point for many people, it has several limitations you should be aware of:

Muscle vs Fat: BMI doesn't distinguish between muscle and fat. Athletes or bodybuilders may have a high BMI due to muscle mass, not excess fat.
Body Fat Distribution: It doesn't measure where fat is stored in your body. Abdominal fat (around your waist) typically poses more health risks than fat stored in other areas.
Age Considerations: BMI may not be as accurate for elderly individuals who lose muscle mass with age.
Ethnic Differences: Some ethnic groups may have different body compositions and health risks at the same BMI levels.
Pregnancy: BMI isn't applicable during pregnancy when weight gain is expected and necessary.
Growing Children: For children and teenagers, age and gender-specific BMI charts should be used.

Important note: BMI is just one screening tool and not a diagnostic test. For a complete assessment of your health, consult with healthcare professionals who can consider other factors beyond BMI.