BMI Calculator
Calculate your body mass index (BMI) with your weight and height. Indicative; does not replace medical advice.
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BMI is indicative. It does not account for muscle mass or age. Consult a health professional. Need web development? Get a quote.
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Quick demo: how to use this tool
- Enter your weight in kilograms and your height in centimeters.
- Press calculate to see your BMI and the category (underweight, normal, overweight, obese).
- Share the result or try another measurement without reloading the page.
About BMI Calculator
Calculate your Body Mass Index (BMI) for free online. Enter weight and height, instant result. Ideal to know if you are at your ideal weight. BMI Calculator is a free tool from the Health category of RoviDev. It is designed for personal care and monitoring your well-being. Remember that the results are indicative and do not replace the assessment of a health professional.
How to use BMI Calculator
- Enter your weight in kilograms in the corresponding field.
- Enter your height in centimeters (or meters, depending on the form).
- Click Calculate BMI to see your index with the WHO category (underweight, normal, overweight, or obesity).
Frequently asked questions
What BMI is considered healthy?
A BMI between 18.5 and 24.9 is considered normal weight according to the WHO. Below 18.5 is underweight; between 25 and 29.9 overweight; and over 30, obesity.
Is BMI useful for athletes?
Not always. The BMI does not distinguish between fat and muscle, so very muscular people can be overweight without being overweight. In those cases it is better to measure the percentage of body fat.
How is BMI calculated?
The weight in kilograms is divided by the height in meters squared (BMI = weight / height²). This calculator does it for you instantly.
Is BMI valid for children and pregnant women?
No. In children, percentiles are used by age and sex, and during pregnancy the BMI is not representative. For children use our child BMI calculator.