# How tall will you be?

Downloadable versions of this activity are available in the following formats:
(RTFPDF)

Here’s a table of average heights for youth at different ages

## Average heights

 Age 2 years 6 years 8 years 10 years 12 years 14 years 16 years 18 years height (cm) Girls 88 115 128 138 156 162 165 165 Boys 89 117 128 141 155 168 174 178

At two years of age, a child measures, on average, about half his or her final adult height.

Example: If you were 85 cm tall at age 2, you could be close to
85 x 2 = 170 cm as an adult.

Fill in the predictions for the adult heights of these 2 year olds:

 Name Height at 2 years Predicted adult height Jake 91 cm. Jasmine 87 cm.

Do you think you will grow to be above or below the average?  Why?

What if you don’t know your height when you were 2 years old?

You can try to predict your adult height, using the table below and your present height. The table below shows how close you are to your adult height at different ages.

## Percentage of adult height at different ages

 Age now 7 years 8 years 9 years 10 years 11 years 12 years 13 years 14 years 15 years 16 years 17 years 18 years % of adult height Girls 74 78 81 84 90 94 97 98 99 100 100 100 Boys 69 72 75 79 82 87 90 94 97 98 99 100

To calculate how tall you might end up, follow these steps:

1. Measure your height now, in cm.
2. Multiply this figure by 100.
3. Divide it by the number that is under the age of your nearest
birthday.