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BMI Calculator

Calculate your Body Mass Index (BMI) to assess if your weight is in a healthy range for your height.

Your BMI
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BMI Formula

BMI = weight (kg) / height (m)²

BMI is a simple measure of body fat based on height and weight. It was developed by Adolphe Quetelet in the 1830s.

BMI Categories

Underweight: BMI < 18.5
Normal weight: BMI 18.5 – 24.9
Overweight: BMI 25 – 29.9
Obese: BMI ≥ 30

Note: BMI doesn't distinguish between muscle and fat mass. Athletes may have a high BMI due to muscle, not excess fat.

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Frequently Asked Questions

How does the BMI Calculator work?

The BMI Calculator uses standard formulas to calculate your results. Enter your values in the input fields and click Calculate to see instant results.

Is the BMI Calculator free?

Yes, the BMI Calculator on CalcMaster is completely free to use with no signup required. Your data stays in your browser and is never sent to any server.

How accurate is the BMI Calculator?

The BMI Calculator uses verified formulas and provides accurate estimates for informational purposes. Results are calculated instantly in your browser.