Calculate BMI

You can quickly calculate the Body Mass Index (BMI) for any child or adult. Just enter height and weight.

For a child under 20 you can see how the child's height, weight and BMI compare with those of other children. Just set the child's sex and birth date.

Note: If a child is less than 120cm (4 ft) tall, Growning Up will also display his or her comparative weight-for-height.