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BMI Calculator

Calculate your Body Mass Index from height and weight, in metric or US units.

What is BMI?

Body Mass Index (BMI) is a simple screening measure calculated from your height and weight. It's widely used because it's quick to compute, but it doesn't distinguish between muscle and fat, so athletes and very muscular people can register as "overweight" despite low body fat. Use BMI alongside other measures like body fat percentage and waist circumference for a fuller picture, and talk to a healthcare provider about what's healthy for your individual body.