BMI Calculator: Compute Your Body Mass Index & Healthy Weight Range

Calculate Your BMI

Enter your height and weight below to get started.

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Inches

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Your Results

Based on your input

-- BMI

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Your Healthy Weight Range

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This is the weight range that keeps your BMI between 18.5 and 24.9 (Normal) for your height.

⚠️ Important: BMI is a screening tool, not a medical diagnosis. It does not account for muscle mass, bone density, or body composition. Always consult a qualified healthcare professional for personalized medical advice.

What is BMI?

Body Mass Index (BMI) is a simple number calculated from your height and weight. It was created by Belgian mathematician Adolphe Quetelet in the 1800s and is now used worldwide by doctors and researchers as a quick screening tool to assess whether someone may be underweight, a healthy weight, overweight, or obese.

Think of it as a rough "health snapshot." It isn't perfect — a highly muscular athlete may score as "overweight" even though they're very fit — but it remains one of the most widely used and well-researched health indicators available.

Category	BMI Range	What it means
Underweight	Below 18.5	May indicate insufficient nutrition or other health concerns.
Normal weight	18.5 – 24.9	Associated with the lowest risk for weight-related health issues.
Overweight	25.0 – 29.9	May increase risk of conditions like high blood pressure or type 2 diabetes.
Obese	30.0 and above	Associated with significantly higher risk of serious health conditions.

Source: World Health Organization (WHO) international classification.