Maybe you just made this year's mark on the wall, and it sits barely above last year's. Or your toddler went through three pant sizes while your 7-year-old seems stuck in the same jeans. Both are usually normal, because how much kids grow each year by age changes a lot: very fast, then slower, then steady for years, then one last surge.

Below is a plain age-by-age growth table, what each stage looks like on a wall, and a simple way to check your own marks against it without worrying over a quarter inch. These are typical ranges, not a diagnosis. Your pediatrician's measurements are always the ones that count.

How many inches do kids grow a year? The table by age

The ranges below are rounded from the WHO and CDC growth charts that US pediatricians use (the CDC growth chart pages explain both). The two spurt rows show a typical child's single fastest year, which runs higher than the charts' average lines. Read each row from one birthday to the next.

A few things make this yearly growth rate chart more useful:

• They're ranges, not targets. A child who grows a little more or less than their row can be right on track, especially if their own marks show a steady pattern.
• Tall and short kids grow at similar paces. After the toddler years, a child near the top of their class and one near the bottom usually add about the same inches each year. Most of the difference between them was set early.
• The spurt rows describe one child's fastest year. Averages for a whole age group look flatter, because kids hit their spurt at different ages. That's why a group of 12-year-olds can look so mismatched in a class photo.

The first two years: the fastest growth of their life

In short: about 10 inches in year one, then 4–5 inches in year two.

A newborn adds roughly an inch a month for the first six months. From 6 to 12 months, that slows to about half an inch a month. By the first birthday, most babies are about 50% longer than they were at birth, going from roughly 20 inches to 30.

Babies are measured lying down, and a wiggly baby is hard to measure well at home. For this stage, lean on the numbers from well-baby visits and treat home marks as a bonus. Our guide on when to start tracking your baby's height covers how to carry those early numbers onto a wall chart later.

Year two is still quick, which is why toddler clothes get outgrown so fast. It's also common for a baby to drift up or down a percentile band during the first two years as they settle toward the family's build. After that, most kids follow a steadier line.

Why the first standing mark can look like a step backward

Around age 2 or 3, kids switch from lying-down length to standing height. Standing height usually reads a fraction of an inch shorter, because a standing child isn't stretched out the way a baby on a measuring board is.

If your first standing mark seems to show less growth than expected, that switch is the likely reason. It evens out by the next year's mark.

Ages 3 to puberty: the steady years

In short: about 3 inches at age 3, then 2–2.5 inches a year until puberty.

The preschool years keep slowing gently. By age 4, many kids are about twice as long as they were at birth, roughly 40 inches for a baby who started near 20. From about age 5, growth settles into the steadiest stretch of childhood.

At 2–2.5 inches a year, a school-age child grows only about a fifth of an inch a month. That's why monthly marks look like nothing, and a single yearly mark tells the real story. Added up, it comes to about a foot between kindergarten and the end of elementary school.

Growth inside a year isn't perfectly smooth, either. Kids often grow in uneven bursts, so a three-month gap can show almost nothing and the next few months catch up.

The slowdown right before puberty

Some kids slow down in the year or two before their growth spurt, sometimes to a bit under 2 inches a year. It can look worrying next to classmates who have already started their spurt.

It's usually temporary. It's also a fair thing to ask about at the next checkup if you're unsure.

The puberty growth spurt: girls first, then boys

In short: girls' fastest year is often around 11–12, boys' around 13–14, and then growth winds down.

Through early childhood, girls and boys grow at nearly the same pace. The split comes with puberty.

• Girls usually start their spurt earlier, often around 10 or 11. Their fastest year brings about 3–3.5 inches. Most of the spurt comes before a first period, and growth usually slows a lot after it.
• Boys usually start about two years later, often around 12 or 13. Their fastest year brings about 3.5–4 inches, sometimes more, and they tend to keep growing for longer.

That timing gap explains the classic middle-school photo where many of the girls stand taller than the boys. A few years later, it has often flipped.

After the peak, growth drops off quickly. Most girls are at or near adult height around 14–16, and most boys around 16–18. A few keep adding small amounts a little later.

Timing varies by years, not months. An early start doesn't mean a child will end up taller, and a late start doesn't mean they'll end up shorter. Siblings can land on very different schedules too, which our post on sibling height differences on one growth chart walks through.

Why your child's number won't match the table exactly

A yearly number that's a little off the table almost always comes down to one of these:

• Family build. Parents' heights mostly shape where on the chart a child tracks, not how fast a school-age child grows from year to year.
• The calendar. Marks taken 10 or 14 months apart aren't a true year. The math in the next section fixes that.
• Measuring differences. Hair, posture, a tilted book or a different helper can move a mark by a quarter inch or more.
• Time of day. Kids are slightly taller in the morning than at bedtime, as the spine settles through the day.
• Puberty timing. A child entering the spurt early, or sitting in the pre-spurt lull, can land well above or below the steady-years range.
• Health and habits. Sleep, nutrition and ongoing illness all play a part. That's one reason the pediatrician looks at the whole picture, not one number.

How to check your own marks (and do the math)

In short: measure the same way each time, then turn the gap into inches per year.

Set up a quick routine you can repeat every year:

• ☐  Shoes off, and hair down (no buns, ponytails or clips).
• ☐  Heels together against the wall, with bottom and shoulders touching it too.
• ☐  Eyes straight ahead and chin level, not tipped up.
• ☐  A hardcover book held flat on the head and pressed to the wall. Mark the underside with a pencil.
• ☐  Measure twice. If the two marks differ, use the spot in between.
• ☐  Measure at roughly the same time of day each year.
• ☐  Write the date and age beside the mark before anyone walks away.

Then do the math. Subtract last year's mark from this one. Divide by the number of months between them, then multiply by 12.

Say two marks are 9 months apart and 1.75 inches apart. That's 1.75 ÷ 9, or about 0.19 inch a month. Times 12, it's about 2.3 inches a year, which sits right in the steady-years range for a 6-year-old.

Give yourself a margin. Home marks can easily be off by a quarter inch in either direction, so a half-inch surprise is usually noise. Compare over at least a full year, and two years is better.

The easiest fix for uneven gaps is one measuring day a year: a birthday, the first day of school or New Year's Day. Our New Year's growth chart tradition has a 10-minute routine if you want a date that's easy to remember.

When a slow year is worth mentioning to your pediatrician

In short: home marks are for noticing. The pediatrician's chart is for deciding.

Most slow-looking years turn out to be measuring noise or normal variation. Still, these are fair reasons to call your pediatrician or raise it at the next well visit:

• A full year of growth well below the range for their age, from careful measurements, not one short gap.
• A child who used to keep pace with cousins or classmates and now seems to be falling steadily behind.
• Signs of puberty that seem much earlier or much later than their peers'.
• Slow growth alongside other changes, like ongoing tiredness, poor appetite or weight loss. Call the office rather than waiting for the next checkup.

Bring your dated marks. A yearly rate from home is useful context, and the doctor can compare it with their own measurements. For plain-language background between visits, the American Academy of Pediatrics' parent site, HealthyChildren.org, covers growth at each age.

Keeping every year's number in one place

In short: the table only helps if you can find last year's mark.

Door-frame marks work until you move, repaint or leave a rental. Numbers in a phone work until you switch phones or forget which app you used. A chart that comes with you keeps the whole run of marks together, and that's what makes the yearly subtraction possible.

That's the job we designed our Canvas Kids Growth Chart ($44) to do. It's 100% cotton canvas, starts at the 6-inch mark so it clears baseboards, and includes a fabric-safe pen for dating each mark. You can personalize it with a name, and because it's portable, the marks move when you do. Hang it by its grommet on a secure nail or hook, and not above a crib.

Canvas Kids Growth Chart

$44.00

View the Canvas Kids Growth Chart

To be clear about the tradeoff: a wall chart won't plot percentiles the way your pediatrician's chart does. It's built for the once-a-year marks you want to keep and compare. Both colorways, including a rainbow version, are in our canvas growth charts collection.

Whatever you mark on, try writing the inches gained beside each new line. Next year's math gets easier, and the numbers become part of the story. Our list of what to write next to growth chart marks has more ideas.

The pattern is simple once you see it: a huge first year, a smaller second, a steady 2 inches or so through the school years, then one last surge. Pick one day a year, measure the same way every time, and do the subtraction. If the number lands near its row, enjoy the new mark. If it doesn't for a full year, bring your dates to the next checkup.

Frequently asked questions