The average 5-year-old boy is about 110 cm (3 feet 7 inches) tall, and the average 5-year-old girl is roughly 109 cm (3 feet 7 inches). There’s a wide range of normal, though. Most healthy 5-year-olds fall somewhere between 102 and 118 cm (3 feet 4 inches to 3 feet 10 inches), and where your child lands in that range depends largely on genetics.
Average Height by Sex
According to the World Health Organization’s growth standards, boys at exactly 5 years old (60 months) have a median height of about 110 cm, or just over 3 feet 7 inches. Girls at the same age are typically about a centimeter shorter. The difference between boys and girls is small at this age and doesn’t become significant until puberty.
The 5th percentile for boys is 102.3 cm (about 3 feet 4 inches) and the 95th percentile is 117.6 cm (roughly 3 feet 10 inches). That means 90% of healthy 5-year-old boys fall within a roughly 6-inch window. Girls follow a similar spread. If your child is anywhere in this range, their height is considered normal.
What “Normal” Actually Means
Percentiles describe where your child’s height falls compared to other children the same age and sex. A child at the 25th percentile isn’t “short” in any medical sense. It simply means 25% of children that age are shorter and 75% are taller. Pediatricians care far less about which percentile your child is on than whether they’re staying on a consistent curve over time.
A child who has always tracked along the 15th percentile is growing normally. A child who drops from the 75th percentile to the 25th percentile after age 3 may need evaluation, even though both of those percentiles are perfectly healthy on their own. The pattern matters more than the number.
What Affects a 5-Year-Old’s Height
Genetics is the single biggest factor. A child’s height correlates strongly with parental height, and father’s height in particular has been shown to be a significant predictor. Pediatricians sometimes use a formula called mid-parental height to estimate where a child is headed. For boys, you add the mother’s height plus 5 inches to the father’s height, then divide by 2. For girls, you subtract 5 inches from the father’s height, add the mother’s height, and divide by 2. About 95% of children end up within 4 inches of that calculated number.
Beyond genetics, nutrition plays a major role. Calcium is essential for bone growth, and children ages 4 to 8 need about 800 mg per day, roughly the amount in two and a half glasses of milk. Adequate protein, vitamin D, and overall caloric intake also support healthy growth. Sleep matters too. Growth hormone is released primarily during deep sleep, so children who consistently sleep poorly may grow more slowly. Physical activity and overall health round out the picture.
How Fast Should a 5-Year-Old Be Growing
Children between ages 4 and 6 typically grow at least 5 cm (about 2 inches) per year. This is slower than the rapid growth of infancy and toddlerhood, and much slower than the eventual puberty growth spurt. If your child is growing less than 2 inches per year in this age range, that’s considered below the expected rate and is worth discussing with their pediatrician.
Signs That Height May Need Medical Attention
Most children who seem short are simply following their genetic blueprint. But certain patterns can signal something more is going on. A child whose height falls below the 3rd percentile, especially if it’s more than about 5 cm (2 inches) below that line between ages 2 and 6, is considered to have severe short stature and is typically referred to a specialist. Crossing downward across percentile lines after age 3 is another red flag, even if the child’s current height is technically in the normal range.
Other signs that warrant attention include a projected adult height well below what you’d expect based on parental heights, sluggishness or chronic fatigue, persistent digestive symptoms like abdominal pain or poor appetite, and significant developmental delays. Prolonged use of certain medications, including steroid inhalers for asthma and stimulant medications, can also slow growth in some children.
How to Measure Your Child Accurately at Home
Getting an accurate measurement at home is trickier than it sounds, and a half-inch error can shift a percentile reading noticeably at this age. The CDC recommends the following approach: remove your child’s shoes, hats, and any bulky hairstyles. Have them stand on a hard floor (not carpet) against a flat wall with no molding. Their feet should be flat and together, legs straight, arms at their sides, and eyes looking straight ahead.
Ideally, the back of their head, shoulders, buttocks, and heels should all touch the wall, though not every child’s body shape allows all four points of contact. Place a flat, rigid object like a hardcover book on top of their head, pressing it firmly against the wall to form a right angle. Make sure your eyes are level with the book so you’re not reading the mark at an angle. Lightly mark the wall where the bottom of the book meets it, then measure from the floor to that mark with a metal tape measure. Record to the nearest eighth of an inch or 0.1 centimeter.
Taking two measurements and averaging them helps reduce error. Measuring at the same time of day also matters, since children (like adults) are slightly taller in the morning and compress a bit by evening.