How is BMI calculated?

BMI = weight in kilograms divided by height in meters squared.

What is a healthy BMI?

A BMI of 18.5 to 24.9 is considered healthy for most adults.

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Calculate your Body Mass Index instantly. Works with metric and imperial units, 100% in your browser.

Height (cm)

Weight (kg)

BMI divides your weight by the square of your height:

BMI = weight (kg) ÷ height (m)²

BMI is a screening measure, not a diagnosis. Athletes, pregnant people, and children should interpret it with professional guidance.

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Calculate your exact age in years, months, days, and discover interesting details like your total days lived and time until your next birthday.