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Maybe your parents still have pencil lines on a door frame back home. Maybe all you have is a shoebox of school photos and a vague sense that you were "always the shortest in class." Either way, you can put your own height on your kid's growth chart with a little detective work, and it turns a list of numbers into a story your child can actually stand next to.

This guide walks through where your old heights are hiding, how to estimate the missing years from photos, and how to mark two (or three) generations on one chart without it turning into a contest.

Why put your own height on your kid's growth chart?

Kids understand height best when it's compared to something real. "You're 42 inches" means little to a five-year-old. "You're taller than Dad was at five" means everything.

A parent's childhood marks also give the chart a second storyline. Your child's marks show where they've been. Yours show where they might be headed, and what life looked like when you were their size.

• It gives your child a reference point that isn't a sibling or a classmate. That's especially helpful for an only child, as we cover in our guide to what to compare an only child's height to.
• It opens conversations. Each of your marks is a chance to say what you liked, where you lived, or who your best friend was at that age.
• It rescues family history that otherwise stays in a box at your parents' house.

Where your childhood heights are hiding

In short: most adults have more height records than they think. They're just scattered across several places, and few of them are labeled "height."

Start a list before you start measuring anything. Use the table below to decide where to look first and how much to trust what you find.

If you're seeing family soon, bring this list. Holiday visits like Thanksgiving are the easiest time to dig through old boxes together, and our guide to the Thanksgiving height check at Grandma's house pairs well with a records hunt.

How to reconstruct your childhood heights, step by step

In short: anchor the ends, fill in what's recorded, estimate the gaps from photos, and label everything by how sure you are.

Step 1: Set your two anchors

Your first anchor is your birth length, if a baby book or hospital card has it. Your second anchor is your adult height today. Measure it fresh, barefoot, against a wall. Many adults are off by an inch or more from the number they've been saying for years.

Step 2: Log every recorded height

Write each number you find with three details: your age at the time, the height, and the source. Convert everything to the same unit. If a report card says "3 ft 9 in," log it as 45 inches.

Work out your age from the date on the record, not the school grade. A first grader can be anywhere from about five and a half to seven.

Step 3: Measure surviving door-frame marks

If old marks still exist, measure each one from the floor with a tape measure, holding it flat against the frame. Photograph each mark with the tape visible so you have a record even if the frame gets painted. Check whether the floor has been changed. New flooring or a thick rug can shift every mark by half an inch or more.

Step 4: Estimate missing years from photos

This is the most useful trick in the whole process. Find photos where you're standing next to something with a known height. Then use simple ratio math.

Good reference objects, with typical US heights:

• Kitchen counter: usually about 36 inches
• Dining table: usually about 30 inches
• Interior door: usually 80 inches tall
• A parent whose adult height you know, standing flat-footed beside you

If the actual object still exists at your parents' house, measure it. A real number beats a typical one every time.

Here's the math, with an example:

1. Print the photo or zoom in on a screen. Use a ruler and pick any unit (millimeters are easiest).
2. Measure the reference object from the floor line to its top. Say the counter measures 90 mm.
3. Measure yourself from the floor line to the top of your head. Say you measure 110 mm.
4. Divide your measurement by the object's: 110 ÷ 90 = 1.22.
5. Multiply by the object's real height: 1.22 × 36 inches = about 44 inches.

Photo estimates work best when a few things line up:

• You and the object are about the same distance from the camera. A kid standing two steps in front of the counter will look too tall.
• The camera is roughly at chest height and level, not shooting down from an adult's eye level.
• You're standing straight, feet flat, not on tiptoe or slouching.
• Shoes are small. Thick-soled shoes add about half an inch to an inch, so subtract it.

If you have two or three usable photos from the same year, average them. If they disagree by more than two inches, trust the one with the cleanest angle.

Step 5: Fill small gaps between solid numbers

If you have a recorded height at age five and another at age seven, splitting the difference for age six is reasonable. Between toddlerhood and the pre-teen years, growth tends to be fairly steady. Our age-by-age chart of how much kids grow each year shows the usual ranges if you want a gut check.

Don't fill gaps this way across the pre-teen and teen years. Growth spurts are uneven and start at different ages for different kids, so a straight line between two points can be off by several inches.

If the toddler years are blank, it's fine to leave them that way. A family landmark like "you could just reach the doorknob" is worth more than a formula, so ask a parent and label what they remember as a memory.

Step 6: Give every number a confidence label

This keeps the chart honest and makes it easy for your child to understand later. A simple code works:

• ☐  R = recorded (report card, physical form, baby book, measured door-frame mark)
• ☐  P = photo estimate (worked out with the ratio method)
• ☐  M = memory (a family member's best recollection)

A family height log you can copy

Before anything goes on the chart, put it in a log. A notebook page, a phone note or a spreadsheet all work. Here's the layout we suggest, filled in with sample entries:

The "That year" column is the part your child will remember. A height plus one small detail ("this was the year I learned to ride a bike") is what makes the mark worth reading out loud.

Keep a copy of the log somewhere safe, separate from the chart. If the chart is ever damaged or you move the marks to a new canvas, the log lets you rebuild everything.

How to mark two generations on one chart

In short: give each generation its own color and its own side, label by age, and match marks by age rather than date.

Pick a side and a color

Put your child's marks on one edge of the chart and the parent's marks on the other. Use a different color for each person, and stick with it for every mark. A fabric-safe marker or pen is the right tool on canvas, since ordinary markers can bleed into the weave.

Use a label format that reads at a glance

Short, consistent labels keep the chart readable as it fills up. A few formats that work:

"Mom, age 6 — 45 in"

"Dad, age 4 — ~40 in (photo)"

"Grandpa, age 8 — ~49 in (Grandma remembers)"

Use the ~ for any estimate. If you'd rather not crowd the label, draw recorded heights as a solid line and estimates as a short dashed line, and write a one-line key at the top of the chart.

Match by age, not by date

The comparison only means something when the ages line up. Each mark sits at whatever height it records, so your lines and your child's lines won't pair up neatly across the chart. Label every mark with an age, not a year. Then on your child's sixth birthday, they can find the line labeled "Mom, age 6" and see whether they're above it, below it, or right on it.

Add your marks all at once

We suggest doing the parent's marks in one sitting rather than one per year. Your child gets a full ladder of "Mom at four, five, six" to grow into, and every birthday becomes a chance to reach the next rung.

A canvas chart suits this well because it can come down from the wall for an evening of careful marking at the kitchen table, then go back up. Our Canvas Kids Growth Chart ($44) is 100% cotton canvas, starts at the 6-inch mark so it clears baseboards, and includes a fabric-safe pen. Hang it securely, and never above a crib.

If your adult height runs past the top

Most growth charts top out before adult height. Write your grown-up height as a note at the top edge ("Dad, grown-up: 5 ft 11 in") instead of a mark. Kids usually find the gap between their head and that note pretty exciting.

Adding grandparents for three generations of height marks

Grandparents are often the best source for your heights, and they may have their own stories to add. Three generations of height marks on one chart is a lovely thing to look at, but it gets crowded fast.

• Limit grandparents to two or three marks each. Pick ages that are well-documented or meaningful, like the first day of school.
• Give them a third color, or put their marks in a narrow middle lane between the child's side and the parent's side.
• Interview them while you're at it. Ask what they remember about being that height, what they played and where they lived. Add one detail to the log.
• Accept that their numbers will be fuzzy. Most grandparent heights will be M or P. That's fine.

If the grandparents live far away, a phone call with a few photos open on both ends works well. Ask them to look for a door frame, counter or sibling of known height in each picture.

Keeping the comparison fun, not a contest

In short: your childhood heights are a story to share, not a target your child needs to hit.

Children grow on their own schedules. A kid who is two inches below your age-five mark at five may still be past your age-eight mark at eight. Height also depends on many things beyond one parent, so the chart can't tell you who your child will turn out to be.

A few ways to keep it light:

• Lead with the story, not the number. Talk about what you did at that height before you say who was taller.
• Celebrate passing a mark, never falling short of one. If your child is below your mark, just say they have something to look forward to.
• Be careful with teen-year comparisons across genders. Boys and girls tend to hit growth spurts at different ages, so a son next to his mom's age-twelve mark (or a daughter next to her dad's) can look uneven for reasons that have nothing to do with how either grew.
• Don't treat your marks as a prediction. If your family enjoys guessing games, our post on fun, not-medical ways to guess how tall your child will be keeps that separate from the chart.

A few lines that work well at the wall:

"When I was your age, I came up to this line. Want to see where you are?"

"This was the year I moved to a new house and got my first library card."

"You passed me! I didn't reach that line until I was seven."

If you ever have questions about how your child is growing, the chart on your wall isn't the right tool. Your pediatrician tracks height on standard CDC and WHO growth charts at well visits and can walk you through what those numbers mean.

Your first evening, start to finish

If you want to get this done in one sitting, here's a realistic plan for an hour or so:

1. Pull together every record you have: baby book, report cards, forms, a folder of photos.
2. Measure your adult height, barefoot, against a wall.
3. Fill in the log with every recorded height first.
4. Pick two or three photos for the biggest gaps and run the ratio math.
5. Text a parent or grandparent for any landmarks they remember.
6. Take the chart down, lay it flat, and add your marks in your color with labels.
7. Rehang it and show your child at bedtime or at the next measuring day.

You don't need every year. Five or six honest marks, some recorded and some estimated, are enough to turn the chart into a conversation. Start with the records you can find this week, label the rest as best guesses, and let your child grow past you one line at a time.

Frequently asked questions