Curious about how tall your kids are going to be? Well apparently there is a mathematical trick to figuring it out.

According to Professor David Ravine, the Head of Medical Genetics at the Western Australian Institute for Medical Research (WAIMR) there is an easy mathematical equation that can forecast the future height of your child with reasonable accuracy.

For boys, the formula is = combine the height of both parents, add 13 centimeters (5 inches) and divide by two.

For girls, the formula is = combines the height of the parents, subtracts 13 centimeters (five inches) and divide by two.

Note that there is a more complex formula accounts for extremes in parental height.

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In a post for baby brand Huggies Prof. Ravine said that genes had a 70 percent influence on your children's likely adult height.

"There's a long list of genes which have an influence on our height. Typically a person's height reflects the heights of their parents," said Prof. Ravine.

Ravine also said environment plays a significant role as well – roughly 30 per cent of the reason people end up being the height they finally are is due to nutrition, particularly in early childhood.

Ravine said: "Nutrition has an effect on how our body forms and grows, so at crucial growing phases in the early years our bodies need the right nutrients to fulfill long-term growth potential."

Let us know if you try it and how it goes.