How is BMI calculated?

BMI = weight (kg) / height (m)². For imperial: BMI = (weight in lbs × 703) / (height in inches)².

What are the BMI categories?

Underweight: <18.5, Normal: 18.5–24.9, Overweight: 25–29.9, Obese: 30+.

BMI is a screening tool, not a diagnostic measure. It doesn't account for muscle mass, bone density, age, or body composition.

Calculate your BMI (Body Mass Index) with height and weight. See your category and healthy weight range.

Weight (kg)

Height (cm)

Enter your weight and height to see results.

Calculate your Body Mass Index from height and weight. Supports metric and imperial units. See your BMI category and healthy weight range.

Metric & imperial

Enter weight in kg or lbs, height in cm or feet/inches.

Category display

See if you're underweight, normal, overweight, or obese.

Healthy range

Shows the healthy weight range for your height.