The question never arrives as a question about words. It arrives as another toddler. A cousin the same age who narrates her entire lunch. A daycare friend who says "excavator." Your group chat, where somebody's 19-month-old has apparently started using "actually."

So you count. Eleven words? Fourteen, if "woof" and the noise that means milk count. (They count. We'll get there.) And then you search for the number that says whether that's enough.

Here is the honest version of that number, at every age from 12 to 36 months. It's a range, the range is enormous, and the useful numbers are not the averages. There are only three numbers on this page worth acting on, and none of them is an average.

Word counts from 12 to 36 months

Two kinds of numbers live in this chart, and confusing them is where the worry starts. "What research reports" is what real children do, measured by the vocabulary checklists researchers have given to thousands of families. "The floor" is the checkpoint number, mostly from the CDC's checklists, which are deliberately set at the 75th percentile: the age by which about three in four children have a skill. Floors are tripwires, not targets.

Research figures from the MacArthur-Bates CDI norming studies and the Wordbank project; floors paraphrased from the CDC's 2022 checklists and the Rescorla late-talker criterion. Full citations in Sources.

Why the average toddler doesn't exist

Look at the 30-month row again. The median child says roughly 570 words. The CDC's checkpoint for the same age is "says about 50 words." Both numbers are correct. They differ by a factor of ten because they answer different questions. One describes the middle of the pack; the other marks the point where a missing skill deserves a professional's attention. We unpack that percentile logic in when do babies say their first words.

And the middle of the pack is a wide place. In the American CDI data collected by the Wordbank project, two-year-olds average 319 words with a standard deviation of 175. In plain terms: one typical child on their second birthday says 150 words, another says 500, and neither is remarkable. Some two-year-olds in the data produce nearly all 680 words on the form; others, a handful.

This is why a number you overheard at the playground can't tell you anything about your child. The honest comparison isn't your toddler against an average. It's your toddler against their own last month.

What counts as a word? Count generously

Most parents undercount, because they count like a dictionary. Researchers count like this: a consistent sound used for a consistent meaning.

If your child hears two languages, count everything in both and add them up. A toddler with 30 English words and 25 Romanian words has 55 words, full stop, and measuring either language alone will make a typical bilingual child look delayed. That arithmetic is exactly what the word book inside Saylings does on its own, one language column at a time, and it's covered properly in raising a bilingual baby.

Growing the number, without drilling

No flashcards. Toddlers learn words from the person who loves them narrating the world, and the research on what helps keeps pointing at the same four unglamorous moves:

• Narrate, don't quiz. "You're pushing the red truck" teaches more than "what color is the truck?"
• Answer every attempt. A grunt and a point deserve a reply with the word in it: "The banana! You want the banana."
• Add one word back. When they say "more," hand it over with "more milk." One word up from wherever they are.
• Reread the same books. The fortieth reading of the same book is not a rut. Repetition is precisely how the words stick.

When the number actually matters

Averages are for reassurance. Floors are for action. There are exactly three moments to act on a word count rather than admire it:

• 18 months, fewer than three words and, more importantly, little babbling, pointing, or understanding. The words are one gauge; the machinery around them is the better one.
• 24 months, fewer than 50 words or no two-word combinations. This is the classic late-talker checkpoint, and it flags roughly 10 to 20 percent of toddlers. Most of them catch up on their own, but an evaluation buys certainty either way.
• Any age, losing words they used to have. Regression is the one finding that outranks every reassurance on this page. That's a call this week, not this quarter.

If one of those describes your house, the calm next steps are laid out in what's normal at 18 months and the 2-year-old who understands but doesn't talk. And if a doctor says wait but your gut disagrees, ask for the referral anyway. An evaluation that comes back fine costs an afternoon.

Everyone else's toddler will hit these numbers in a different order, at different ages, with different words. Yours will too. That's not the caveat. That's the finding.

Common questions

Is 10 words at 18 months normal?

Yes. The CDC's 18-month checklist looks for a child who tries to say three or more words besides "mama" and "dada," and 10 clears that comfortably. What matters more than the count at this age is the machinery around it: pointing, gestures, understanding simple requests, and a number that keeps creeping up month over month.

Do animal sounds, signs, and made-up words count as words?

Yes, count them. A word is a consistent sound used for a consistent meaning. If "baba" always means bottle, it's a word. "Moo" for cow is a word. A sign used reliably for "more" counts as communication. Count your child's version, not the dictionary's.

When do toddlers start combining words?

Usually once their vocabulary reaches roughly 50 words, which the median child does between 16 and 20 months. Two-word combinations like "more milk" typically follow, and the CDC's 24-month checklist looks for at least two words said together.

This article is general information for parents, not medical advice. Every child develops at their own pace. If you have concerns about your child's speech or hearing, talk to your pediatrician.