Ways to Calculate How Tall Your Children Will Be

No matter how many times you buy clothes, your child seems to quickly grow out of them. You may even find yourself asking how tall your child will be. Comparing yourself to your spouse and then guessing how tall your child will be is a tough way to be accurate. Although there is no exact science, parents can use certain methods to calculate how tall their child may be when they enter adulthood.

  1. Genetic Potential

    • There is not a 100-percent accurate way to tell how tall your child will be. Pediatricians refer to the genetic potential as a way to guess how tall your child will be based on your and your spouse's heights. For boys and girls, add the two parents' heights together in inches. Divide the total by two. Add two and half inches to that number, and that is the height your child will be within a four-inch range above and below that.

    Height Calculator Tools

    • Height calculator tools consider genetics and factor in your child's current growth. These height calculators can be found on web sites such as WebMD or Baby Center. For these calculators, you need to know your height, the height of the other parent and your child's gender, weight, height and current age for the most accurate results. Most of these types of height calculators require your child to be older than 4 years old for accuracy.

    Growth Charts

    • In pediatrics, children are monitored by a growth chart. This chart monitors your child's height, weight and head circumference at each wellness checkup. It is theorized that if your child follows the consistent curve of his growth chart, you can predict his height and weight at age 21. For example, if your child is on the 75th percentile line, follow it until age 21 to see his predicted height and weight.

    Age Three

    • According to Kids Growth, another method for calculating your son or daughter's height uses their height at age 3. At this age, it is thought that boys are at 54 percent of their adult height and girls are at 57 percent of their adult height.

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