Divide that total by two. That total is an estimated height for the child. Remember that children grow at different rates and genetics may make a child taller or shorter than their parents.
For your boy, take his height at 24 months. Double this number. This is the predicted height. For girls, double the height around 18 months of age for an estimation.
Do this as many times as needed to climb up the object.
For example, if your friend is 65 inches (165 cm) tall, and you moved the stick up four times, you would multiply 65 in (165 cm) by four. If the last measurement doesn’t use the stick completely, estimate the amount of the stick, such as one third, one half, or three-fourths.
For example, if a person is standing near a building, you can assume the person is around 65 inches (165 cm) to 72 inches (183 cm). You can base the height of the taller or shorter object on that. If two people are standing side by side, you can compare the heights. If you know that person A is 66 inches (168 cm) and the person beside them only comes to their shoulder, you can estimate that they are four to six inches (10 to 15 cm) shorter.
If you don’t know how tall anything is, you may look at a building, a light post, and a car. You know a car is shorter than most people, a light post is around twice the size of a person, so you can estimate that the car is 48 inches (122 cm) and the light post is 120 inches (305 cm). Based on that, the building must be much taller.
Hold it completely vertical and walk until the top of the object is at the same spot as the top of the stick. Mark where you are standing. The distance between you and the object is the estimated height of the object.
