A 12-year-old boy should be between 137 cm to 160 cm tall (4-1/2 to 5-1/4 feet).
For example, if you look at the CDC growth chart for boys 2 to 20 years, a 13-year-old boy who is 5'1" (61 inches tall) is in the 50th percentile. Based on that curve, they should reach an adult height between 5'9" or 5'10" (69–70 inches).
A 12 year old boy should be between 4 1/2 and 5 1/4 feet tall. A 12 year old girl should be between 4 1/2 and 5 1/3 feet tall. The Center for Disease Control (CDC) developed a chart to help doctors gauge whether children are the average height and weight they should be for any age up to 20 years old.
According to the U.S. Food and Drug Administration, short stature means an estimated final height below 5 feet 3 inches for boys or 4 feet 11 inches for girls.
How Tall Should a 12-Year-Old Be? We can only speak to national average heights here in North America, whereby a 12-year-old girl would be between 137 cm to 162 cm tall (4-1/2 to 5-1/3 feet). A 12-year-old boy should be between 137 cm to 160 cm tall (4-1/2 to 5-1/4 feet).
Changes in Boys
They tend to grow most quickly between ages 12 and 15. The growth spurt of boys is, on average, about 2 years later than that of girls. By age 16, most boys have stopped growing, but their muscles will continue to develop.
Taking good care of yourself — eating well, exercising regularly, and getting plenty of rest — is the best way to stay healthy and help your body reach its natural potential. There's no magic pill for increasing height. In fact, your genes are the major determinant of how tall you'll be.
However, several formulas can provide a reasonable guess for child growth. Here's a popular example: Add the mother's height to the father's height in either inches or centimeters. Add 5 inches (13 centimeters) for boys or subtract 5 inches (13 centimeters) for girls.
The averages for 12-year-olds are 89 pounds, for males, and 92 pounds, for females. However, beyond biological sex, many other factors influence someone's weight at this age, including their height, body composition, the onset of puberty, environmental factors, and underlying health issues.
5 feet 7 inches in cm = [(5×12)+7] x 2.54 = 67 x 2.54 = 170.18 cm.
A major growth spurt happens at the time of puberty, usually between 8 to 13 years of age in girls and 10 to 15 years in boys. Puberty lasts about 2 to 5 years.
The height value range of 13-year- old males is distributed with the range of 27% from 165 to 170 cm and with a 22% cover range from 160 to 165 cm height.
Shoe size generally is proportional to height, so it's used in many height-predicting formulas out there. A lot of the time, these formulas take into account the parents' height, as well. However, the results are usually far from reliable. Prior to puberty, many kids haven't had a major growth spurt yet.
“Around 68% of the adult male population are within 3 inches of that height, so 5'7"falls within that majority range. That's pretty "normal" (i.e. common, typical) for men. So 5'7" is a little bit shorter than average, but falls within the typical range for an adult male.
If you are a man with average height, you can expect your son to be a few inches (centimeters) taller than you. This is because the regression line and the SD line both coincide at the average heights. For instance, a father with an average height of 67.7 inches (172cm) will have a 68.7-inch-tall (175cm-tall) son.
Add 5 inches to mom's height and average this with dad's. Ex: if mom is 5'4” you would add 5 inches to make 5'9” and then average with dad's height of 5'11” and your little boy's predicted genetic height is 5'10”
During puberty, boys and girls will have a growth spurt and grow to their adult height. So that means girls who start puberty the latest will still be getting taller in their mid-teens. For boys, the latest to reach puberty will still be getting taller into their late teens.
Your child will experience many changes in their body during this time. For girls, puberty usually occurs between ages 10 to 14, and for boys, between ages 12 to 16.
Typically, boys will tend to grow an average of 3 inches, or 7.6cm, each year during puberty. In general, a boy's age during puberty will not affect his final height, but it will affect when his height growth begins and stops.