What's your Body Mass Index?

Enter your height and weight to get your BMI, category, and a healthy weight range — instantly, for free.

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UnderweightNormalOverweightObese
BMI is a general screening tool, not a medical diagnosis. Talk to a healthcare provider for a full health assessment.

BMI categories (WHO standard)

BMICategory
Below 18.5Underweight
18.5 – 24.9Normal weight
25.0 – 29.9Overweight
30.0 and aboveObese

Frequently asked questions

What is a healthy BMI range?

For most adults, a BMI between 18.5 and 24.9 is considered a healthy weight range, according to WHO guidelines.

How is BMI calculated?

BMI = weight (kg) ÷ height (m)². In imperial units: BMI = weight (lb) ÷ height (in)² × 703.

Is BMI accurate for everyone?

BMI is a useful general screening tool but doesn't directly measure body fat, and may be less accurate for athletes or people with high muscle mass.