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BMI Calculator

Assess your Body Mass Index (BMI) by entering height and weight. Instantly see your BMI score, the standard category, and the healthy range recommended by the World Health Organization.

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Calculator

Follow the steps below and update the fields to see instant results.

Stand tall without shoes.

Use the same scale each time.

BMI results

Results update instantly as you change the inputs.

BMI score22.5
CategoryNormal weight
Healthy range18.5 - 24.9
BMI is a screening tool. Pair it with professional medical guidance.

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BMI scale

See where your BMI falls within the World Health Organization categories.

Underweight≤ 18.4
Healthy≤ 24.9
Overweight≤ 29.9
Obesity≤ 60.0
22.5

How it works

BMI compares weight to the square of height. Scores below 18.5 indicate underweight, 18.5–24.9 normal weight, 25–29.9 overweight, and 30+ obesity. Although widely used, BMI does not distinguish between muscle and fat mass.

Treat your BMI as a conversation starter with a healthcare provider. For athletes or older adults, consider complementary metrics such as waist-to-height ratio, body fat percentage, and resting heart rate to build a fuller picture.