Normal Heights for Children

How to calculate your child's height

Ask your child to stand against the panelling of a doorway. Make sure the child is standing straight with heels against the doorway panelling. The child's chin should be pointed straight ahead. If your child cannot stand upright, then a partner can hold the child upright against the panelling by holding the child under the arms.

Make a pencil mark on the panelling at the spot where the top of his or head rests against the doorway.

Make a new mark every month -- especially during ages when a child is growing quickly.

Use a yardstick to measure from the bottom of the floor all the way up to the pencil mark to determine the height of your child.

Visit an online, free site for a children's adult height prediction calculator.

Indicate whether the child is female or male by clicking on the circle beside each option.

Click the drop-down box by the child's age, and select the age.

Type in the child's height, the child's weight, the mother's height and the father's height.

Click the "Calculate" button to get the estimation of your child's height at a certain age.

How to Predict Your Teenage Daughter's Height

Measure the height of the mother and the height of the father in inches using a measuring tape. Convert feet to inches by multiplying by 12. For example, a height of 5 feet 4 inches is 64 inches.

Add the two heights together. Subtract 5 inches from the total. For example, the mother's height of 64 inches plus the father's height of 72 inches is 136 inches. Subtracting 5 inches makes 131 inches.

Divide the number by two, and convert back to feet and inches by dividing by 12. For example, 131 inches divided by 2 is 65.5 inches. Converted to feet and inches, this is 5 feet 5.5 inches. Assuming good health, your daughter's height should fall within 4 inches of this predicted height.

Things You Will Need

  • Measuring tape
  • Calculator


Another method of predicting your daughter's adult height is to double her height at age 2. If your daughter is consistently in the same percentile range on growth charts, you can follow that percentage to determine her height at age 18. Most girls grow only an additional 2 inches after their first period.

How to Figure Out Your Toddler's Adult Height

At Age 2

Remove your toddler’s shoe and ask him to stand straight and tall against a wall. By the age of 2, most toddlers have reached the growth chart percentile that they will stay on until they reach adulthood, according to the Mayo Clinic website. This age is the appropriate time to try to determine his adult height.

Place a pencil mark on the wall directly above your child’s head. Ensure that he doesn’t tilt his head to look at you as you make the mark. This helps give you the correct measurement.

Stretch a tape measure from the floor to the mark on the wall to take the measurement.

Multiply the height of your tot by two in order to obtain a good estimation of his height as an adult. For instance, if your son is 34 inches tall, you can have a reasonable expectation that he will be 5 feet 7 inches tall or taller as an adult. Females will be a bit shorter than the calculation and males will be a bit taller, according to the Mayo Clinic website.

Height of Parents

Add together your height in inches and the child’s father height in inches. This is another effective way to estimate the toddler’s adult height.

Subtract 5 inches from the total if your toddler is a female.

Add 5 inches to the total if your toddler is a male. The sum you get is likely to be within 4 inches of the adult height of the youngster.

Things You Will Need

  • Sharpened pencil
  • Tape measure
  • Calculator (optional)


Males and females grow at different rates and go through growth spurts at different ages. While a girl might reach her full height by age 16, males generally continue to grow until about age 18, according to the Texas Wesleyan University website. Heredity, nutrition, physical fitness and hormones all play a part in your child’s final height and weight. Take your youngster for regular checkups with his pediatrician. He will be able to assure you if your child is growing normally.

How to Figure Your Baby's Weight & Height Percentile

Determine your baby's weight. Pediatric scales are the most accurate in weighing a baby. Weigh your baby nude. If you do not have a pediatric scale, you can use a regular bathroom scale. Step on the scale yourself and document your weight. Afterwards, pick up your naked baby and step back on the scale. Write this number down. Subtract the first weight from the second weight and you will have an accurate weight for your baby.

Figure your baby's height. Lie your baby down on a flat surface. Mark with a pencil where the head is. Gently stretch out your baby's legs and mark where the heels come to. Measure the length in inches or centimeters from one mark to the next.

Calculate your baby's head circumference, which is the largest part of the baby's head. Place the end of the tape measure above the eyebrows and the ears and continue on around the head. Document in centimeters or inches where the tape measure comes together.

Record the results in an online growth calculator. A number of free online services will calculate your baby's height and weight percentile. They will ask for age, sex, height, weight and head circumference. These calculators include conversion charts from pounds to kilograms and inches to centimeters. Input your baby's measurements and select "Calculate," "Get Results" or similar button on the calculator you are using.

Consult with your baby's pediatrician if any of the results measure less than the 5th percentile or more than the 95th percentile. A pediatrician can confirm whether the baby's growth is within a normal range.

Things You Will Need

  • Pediatric or bathroom scale
  • Tape measure

How to determine children's height & weight percentiles

Stand your child on a level surface, such as a hardwood or ceramic floor, against a wall. Position your child so that his feet are together, his back is straight and his shoulders are against the wall.

Position a ruler across the child's head and against the wall. This ensures that her hair is pushed down and not part of the measurement.

Place a pencil where the ruler meets the wall and make a small mark.

Move the child away from the wall.

Measure from the floor to the pencil mark on the wall. For small children, use a yardstick. For older children, use a tape measure.

Note the height in inches on a piece of paper.

Place a scale on a hard surface, such as a hardwood or ceramic floor.

Remove the child's shoes and any excessive clothing. Thin clothing will give you the most accurate measurement of your child's weight.

Stand your child on the scale.

Jot down your child's weight on a piece of paper.

Access the Internet and navigate to the CDC growth charts at "" These are the official government growth charts used by paediatricians in the United States.

Find the "CDC Clinical Growth Charts" in the "Growth Charts" box on the right side of the web page. Click on the first link "2000 CDC Growth Charts for the United States: Methods and Development." A .pdf file will download containing the research methodology for the growth charts.

Navigate to page 19 in the References section of the .pdf to begin viewing the growth charts for weight. You may need to scroll a few pages to find the specific chart for your child's age-range and sex.

Find your child's age in months along the bottom of the page, then move your fingers upward until you find your child's weight. Locate the diagonal line where your fingers meet on the age and weight and read the percentage noted on the diagonal line.

Navigate to page 21 in the References section of the .pdf to begin viewing the growth charts for height. You may need to scroll a few pages to find the specific chart for your child's age-range and sex. Depending on the age of your child, the height charts may be titled "Length" for younger children and "Stature" for older children.

Find your child's age in months along the bottom of the page, then move your fingers upward until you find your child's height. Locate the diagonal line where your fingers meet on the age and height and read the percentage noted on the diagonal line.


If your child's height or weight percentiles have dramatically changed since your last paediatrician's visit, schedule a follow-up with your doctor to rule out any health issues.

What should my weight be for my age & height?


Body mass index (BMI) is a ratio of weight to height used to classify individuals into health risk categories taking into account weight and height for adults and age, sex, weight and height for children ages 2 to 20. Only BMI data for children and teens take age and sex into consideration, because in this age group the amount of body fat changes with age and differs among boys and girls.


Percentiles are measurements on a chart that show where a child is in regards to sex, age and height compared with other children. Children and teens are underweight if their BMI value in relation to their gender and age fall into the less than fifth percentile, healthy weight if between the fifth and 85th percentile, overweight if between the 85th and 95th percentile and obese if equal to or greater than the 95th percentile.


A weight-to-height ratio that predicts an overweight or obese percentile should prompt action for weight loss, but a weight loss regimen should not be considered before consulting a physician. Factors such as hormones, genetics and environment all influence height and weight. The doctor will take all these factors into consideration and make necessary recommendations for action from there.

Ideal Height & Weight for Children


Not all children grow at the same rate, have the same bone structure or have the same lifestyle. All of these factors play a role in a child's development, causing a wide range of heights and weights to be acceptable for healthy children of any age. Doctors typically use individual growth charts to ensure that each child is developing normally.


Growth charts track a child's height and weight gains over time and compare her growth to that of other children of the same gender and age. Growth charts inform parents and doctors of a child's percentile; a child in the 90th percentile for height is taller than 90 per cent of his peers. The KidsHealth website notes that there is no ideal percentile for any child, but that children's growth rate and percentile should stay fairly consistent over time.


Warning signs of potential health problems related to a child's weight and height are often found through a growth chart, such as a child dropping from a high height percentile down to a lower percentile in just one year or a child who is not gaining weight at the same rate she is growing taller. A child's doctor is able to provide more information about an ideal weight and height.