Metric BMI Calculator

BMI Calculator — kg and cm

Calculate your BMI using metric units. Enter your weight in kilograms and height in centimeters for an instant BMI result with weight category and ideal weight range.

Height

Weight

Sex

Age (optional)

years

Your BMI

Enter your details

Under-
weightNormalOver-
weightObese

Healthy weight range

Ideal weight (Hamwi)

BMI Prime

Ponderal Index

BMI Categories (WHO)

Category	BMI Range	Health Risk
Underweight	Below 18.5	Moderate
Normal weight	18.5 – 24.9	Low
Overweight	25.0 – 29.9	Increased
Obese Class I	30.0 – 34.9	High
Obese Class II	35.0 – 39.9	Very High
Obese Class III	40.0+	Extremely High

Medical disclaimer: BMI is a screening tool, not a diagnostic measure. Consult a healthcare professional for personalized medical advice.

Metric BMI formula

The metric BMI formula is: BMI = weight (kg) ÷ height (m)². For example, if you weigh 73 kg and are 178 cm (1.78 m) tall: BMI = 73 ÷ (1.78 × 1.78) = 23.0 — which falls in the normal weight range.