Height Calculator

Estimate how tall your child may grow

Height and growth can vary drastically between individuals. Often it is best to determine a person’s height potential by assessing their genetics and environment. Using a calculator can help you find a reasonable estimate for your child’s adult height by analyzing a few personal details, and can allow you to know if your child’s growth is progressing reasonably.
Why height and growth are so important
The height of people around the world can vary widely between countries and even within families. Humans can be very tall or unusually short, with varying levels of slimness or roundness. With so many different shapes and sizes, it can be difficult to understand what normal growth is.
Studies suggest that most of our height can be inherited from our genetics and part of our development can be affected by certain medical traits and environmental factors. There are also growth charts that have been extensively developed by doctors to compare the growth of children of the same age and gender, for a basis of what correct maturing means.
Being familiar the growth process and the things that may impact it, is vital for monitoring early years of development into late adolescence ages. Any irregularities in your child’s growth patterns can provide insight into potential problems and having an idea of their future height can help indicate if they are growing at the right pace.
What is this calculator for?
It is natural for parents to wonder often how tall their toddler may grow to be, even before they are born. Kids and adolescents may also have similar questions about their height when they’re older, even just to know when they will stop growing. While several methods exist to provide an approximation of adult height, no process will determine adult height with complete certainty.
The height calculator is a fun tool designed to help you get an idea of how tall someone may grow to be by using a growth algorithm that is adapted from a mid-parental method. By providing some current measurements and the height of both parents, the system will provide an expected adult height estimate.
There are various medical conditions and ethnic backgrounds can cause a person to reach a different adult height then this tool predicts, therefore, results should be used as approximations only.
How is future height predicted?
Using other methods to estimate future adult height can help you gain a more comprehensive idea of what height range a kid may fall into.
If you have kept a record of your toddler’s height at regular intervals, you can also assume their future height once they reach a certain age. Double the child’s height at age two if it’s a boy, or at eighteen months for a girl, to speculate how tall they may be as an adult.
Example: A two-year-old boy is 2’9. That converts into 35 inches, and when doubled it results in 70 inches. Theoretically, this boy should grow to be 5’8.
If your child is very young or you want another perspective, using the average parent height can provide an estimate within a small margin of error. For boys, add 5 inches to the mother’s height and then combine that figure with the father’s height. For girls, subtract 5 inches from the father’s height, and then add it to the mother’s height. Divide the final figure by two to get an idea of future height potential.
However, the most precise method to determine expected height is through taking bone age radiographs. A doctor can take an x-ray of the wrist and hand of a child or adolescent to observe the position of growth plates. The growth plates eventually fuse, and analyzing them may indicate how much taller, and longer, someone may continue to grow.
What is considered standard growth?
From the day a child is born their growth is tracked on a development chart. At first, the baby will have measurements taken of their length, weight, and circumference of their head. As the child ages, their growth will be continually mapped according to their body mass index, age, height, and gender.
The charts are designed to cover all the variations of normal growth and can mark the changes in your child’s measurements through the use of percentile bands. Percentile bands compare your child against all other kids of the same age and gender to determine how growth distributes in the population. A child in the 70th percentile is considered to be taller and heavier than 70 percent of other kids at their age and gender.
Growing along a low or high percentile band doesn’t necessarily indicate any problems with health or development. When the child grows consistently along with a particular percentile, it merely shows that they may be shorter or taller then part of the population. However, any drastic or disproportionate changes in their growth pattern can be indicative of a problem related to their health or environment.
Guidelines for average growth
Every child will have unique measurements when they are born, but there are some directives of what to expect as they are growing. Please view the table below:


Birth to 1 yearBirth height should progress by about 25 cm within the first year.
1 to 2 yearsBetween the age of one and two, height should improve by about 10-15 cm.
2 to 3 yearsHeight may increase more quickly from age two to three with healthy growth up to 10cm in one year.
3 years to pubertyUntil puberty, it is customary to grow about 5 cm a year. The onset of puberty may cause rapid individual growth spurts.


Birth to 1 monthChild should double their weight in the first two weeks and can gain up another 2 pounds by the end of the first month
1 month to 3 monthsIt is common to gain 1 pound a month until 3 months
3 months to 5 monthsWithin the first 5 months, a child should double their birth weight
5 months to 1 yearTypical weight gain between month 5 and 12 is up to half a pound per month. Birth weight should be tripled by the child’s first birthday.
1 year to 2 yearsFrom age one to two, it can be customary to gain up to 5 pounds and quadruple the birth weight.
2 years to pubertyWeight gain should be steady until puberty at which point it can be normal to gain up to 10 pounds each year until puberty peaks.
The growth guidelines are based on population averages and thus is it possible to achieve height and weight gain differently than described here. If you are concerned about the way someone is growing, it is best to speak to your medical professional.
Factors that can affect final adult height
Final adult height can be influenced by many factors, and only about eighty percent is inheritable from genetics. Health conditions, any early or delayed growth of family members, and chronic illnesses can all impact development potential. While external factors like diet, nutrition, and exercise can also have a definite bearing on how tall a person is capable of growing.
Other environmental factors such as living conditions can affect height potential due to the direct correlation with proper diet, nutrition, and availability of medical care. Average height tends to be greater for people living in areas where the population is better off.
Because growth and development can vary tremendously between what is considered normal, there is often nothing to worry about your child’s development. With this information, it can be reasoned that regular medical visits, proper nutrition, and good overall health can help a child reach their full height.
Remember to bookmark this calculator and save it to the home screen of your smartphone or tablet to have instant access this great tool. By using the share feature, you can promote us on social media and help others better understand the factors of healthy growth.
How to use the calculator
The height calculator is very straightforward to use and only asks a few simple questions relative tothe parents and their child. Let’s review this information together.
expected adult height
Step 1: To start, you should select the unit of measure you are more comfortable with: US units or metric units. You can make your selection using the tabs at the top of the calculator.
Step 2: On the first four lines of the calculator, please add your child’s age, gender, height, and weight, using the arrow keys to adjust the inputs quickly.
Step 3: Include the parent’s information. The mother’s height and the father’s height can be added to the final two lines of the calculator.
adult height
Step 4: See your child’s expected adult height in the top right-hand corner of the calculator.