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BMI Calculator

Free Online BMI Calculator

Calculate your Body Mass Index (BMI) using metric or imperial units to evaluate general body composition.

Medical Disclaimer: Body Mass Index (BMI) is a general screening metric for population statistics. It does not measure body fat directly and does not account for muscle mass, bone density, age, or sex. It is not medical advice. Consult a licensed medical professional for personal health evaluations.

Measurement System

Height (cm)

Weight (kg)

Feet (ft)

Inches (in)

Weight (lbs)

22.9

Your BMI Score

Normal Weight

Classification

56.7 - 76.3 kg

Healthy Weight Range

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About Free Online BMI Calculator

Evaluate your Body Mass Index (BMI) using international World Health Organization (WHO) medical criteria. Toggle between Metric (centimeters/kilograms) and Imperial (feet/inches/pounds) units to assess weight classification with clear visual color indicators.

How to Use Free Online BMI Calculator Online

Select Unit System

Toggle between Metric (cm and kg) or Imperial (ft, inches, and lbs) measurement modes.

Enter Height & Weight

Type your current stature and body weight values into the calibrated fields.

Calculate BMI Score

Review your exact Body Mass Index numerical score and highlighted WHO weight bracket.

Inspect Healthy Range

Examine the healthy weight benchmark for your specific height to inform fitness and wellness goals.

Key Features & Privacy Benefits

Metric & Imperial Toggles: Seamlessly switch between centimeters/kilograms and feet/inches/pounds with automatic conversion.
WHO Standard Categories: Accurately classifies scores into Underweight (<18.5), Normal Weight (18.5-24.9), Overweight (25-29.9), and Obese (>=30).
Visual Health Range Gauge: Color-coded category indicator offers immediate visual context on where your score rests.
Private Local Calculations: Your height and weight measurements are calculated locally in your browser and are not transmitted or stored on remote servers.

Frequently Asked Questions

What is Body Mass Index (BMI)?

BMI is a recognized screening formula that evaluates the relationship between your weight and height to categorize body composition and general health risks.

What is considered a healthy BMI score?

According to the World Health Organization (WHO), a BMI between 18.5 and 24.9 is considered the healthy/normal weight range for adult men and women.

Does BMI account for muscle mass?

BMI is a general screening metric based purely on weight and height. Athletes and bodybuilders with high muscle mass may register a high BMI despite low body fat.