BMI Calculator

Calculate your Body Mass Index (BMI) to determine if you're at a healthy weight for your height. Our calculator supports both metric (kg, cm) and imperial (lbs, ft) units.

Enter Your Details

Fill in your measurements to calculate your BMI

Step 1/2

Unit System

Height

Enter your height in centimeters

Weight

Enter your weight in kilograms

What is BMI?

Body Mass Index (BMI) is a simple calculation using a person's height and weight. The formula is:

BMI = weight (kg) / [height (m)]²

BMI is used to categorize individuals into weight classifications that may indicate health risks:

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

While BMI is a useful screening tool, it's important to note that it doesn't directly measure body fat or account for muscle mass, bone density, and overall body composition.

How to Use This Calculator

Select your preferred unit system (Metric or Imperial)
Enter your height in centimeters or feet and inches
Enter your weight in kilograms or pounds
Click "Calculate BMI" to see your result
Review your BMI value and category classification

Frequently Asked Questions

What is BMI and why is it important?

BMI (Body Mass Index) is a measure of body fat based on height and weight. It's used as a screening tool to identify potential weight-related health problems in adults.

What is a healthy BMI range?

A healthy BMI is typically between 18.5 and 24.9. A BMI below 18.5 is considered underweight, 25-29.9 is overweight, and 30 or above is considered obese.

Is BMI accurate for everyone?

BMI is a useful general indicator, but it has limitations. It doesn't account for muscle mass, bone density, or body composition. Athletes and very muscular individuals may have a high BMI without excess fat.

How often should I check my BMI?

It's recommended to check your BMI every few months if you're actively working on weight management. For general health monitoring, checking once or twice a year is sufficient.

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