BMI calculator

Quickly calculate your Body Mass Index and see where you fall on the health scale.

Weight (kg)

Height (cm)

Your BMI Score 22.9

Normal Weight

What your BMI means

BMI is a useful screening tool, but it's not perfect. It doesn't account for muscle mass, bone density, or overall body composition.

Is BMI different for US vs Metric?

The BMI formula is the same globally, but the units differ. In the US, the formula is: [weight (lb) / height (in)²] x 703. Our calculator handles this conversion automatically for you.

What are the official categories?

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