Speech Sound Development Chart by Age: When Do Children Learn Each Sound?

Children learn to say speech sounds in a fairly predictable order, from about age 2 to age 7. Easy sounds like p, b, and m come first. Trickier sounds like r and th come last. The chart below shows the typical age when most children can say each sound. Keep one thing in mind as you read: these ages are averages, not deadlines. The age listed is when most children have a sound. It is not the moment a missing sound becomes a problem. This guide walks you through the chart, how clear your child's speech should be at each age, what counts as normal, and when it's worth a call to your pediatrician.

Speech Sound Development Chart by Age

Most children learn speech sounds in a set order, and the chart below shows when. It is built on the most recent large US review of children's speech, Crowe and McLeod (2020), which looked at nearly 19,000 children.

By each age below, at least 9 out of 10 children say these sounds correctly in simple words. (Researchers call this the 90% mark.)

A few notes so the chart is easy to read. The "y" here means the sound at the start of yes, not the letter y in baby. The "ng" is a single sound, as in ring, not an n plus a g. And the "zh" sound (as in measure or treasure) is rare in English, so you may barely notice if it's missing.

The stopped and hummed sounds tend to come first. The hissy, buzzy, and "th" sounds come last. That pattern is normal and expected.

How to Read This Chart

Read the chart with these four points in mind:

• These are averages, not deadlines. The age listed is when most children have the sound. It is not the age at which a missing sound becomes a problem. Children vary by several months, and that's normal.
• Where the sound sits in the word matters. A child may say d correctly at the start of dog before they can say it at the end of hand or the middle of spider. So a sound can be "coming in" in some words before others.
• Sound clusters are their own skill. A consonant cluster is two or more consonants in a row, like the tw in tweet or the nd in sand. A 4-year-old who says "spway" for "spray" is not behind. Clusters take extra time.
• Accent and dialect are not errors. How your child says sounds can be shaped by where you live, your family, and the languages you speak. These differences are not a speech problem.

Why Do the Charts Online Disagree?

If you compare three speech-sound charts online, you may get three different answers. Here's why:

• They use different cutoffs. A chart based on "75% of children" lists every sound earlier than a chart based on "90% of children." This guide uses the 90% mark.
• They come from different decades. Older charts, built on 1990 norms, placed the r sound several years later. The newer 2020 review places it at ages 5 to 6.
• They test speech differently. Some measure single words; others measure full conversation.

So if you've seen a chart that says r isn't expected until much later, you've likely seen an older one. This guide uses the most recent US review of nearly 19,000 children.

Early, Middle, and Late Sounds: What the Order Means

Grouping sounds into early, middle, and late makes the chart easier to remember. Each group matches a band on the chart above.

Early Sounds (p, b, m, n, h, w, d): By About Age 3

These are the first sounds most children say clearly. They're made with the lips or the front of the mouth, so they're easy to see and copy. Words like mama, dada, ball, and no are built from these sounds. By around age 3, most children say them clearly in simple words.

Middle Sounds (k, g, f, t, "ng," y): By About Age 4

Next come sounds made further back in the mouth, like k and g, plus f, t, "ng," and the y sound in yes. It is common for a younger child to swap t for k, saying "tup" for "cup." This usually sorts itself out by around age 4.

Late Sounds (s, z, sh, ch, l, v, j, r, th): Ages 5 to 7

The last sounds to arrive are the hissy, buzzy, and "th" sounds: s, z, sh, ch, l, v, j, r, and th. These need finer tongue control, so they take longer. The r sound and the voiced th (as in this) aren't expected until ages 5 to 6. The th in thumb can take until age 7. A 5-year-old who still says "wed" for "red" is usually right on track.

By age 4, your child speaks so that people can understand most of what they say. Child may make mistakes on sounds that are later to develop, like l, j, r, sh, ch, s, v, z, and th.

American Speech-Language-Hearing Association (ASHA)

How Much of My Child's Speech Should Others Understand?

Besides which sounds your child can say, it helps to think about intelligibility, which means how easily other people understand your child. This is a simple thing you can check at home, and it grows steadily with age.

A simple rule of thumb pediatricians have used for decades: a child's speech is roughly as clear as their age in years divided by 4. So a 2-year-old is about half clear, and a 3-year-old about three-quarters clear. It's a rough guide, not a hard rule, and it stops being useful past about age 4. When researchers measured this directly, the average child reached about 90% clarity in everyday conversation closer to age 5.

Here's the honest, simple version to remember: by age 4, a stranger should be able to understand most of what your child says. If they can't, that's worth a conversation with your pediatrician.

One of the most common worries pediatricians hear from parents of 3-year-olds is that strangers can't understand their child. Often the sounds are developing normally for that age. But it is exactly the right thing to check.

What's Normal vs. a Red Flag?

Plenty of "mistakes" are a normal part of learning to talk. Three kinds are especially common, and most children grow out of them:

• Swapping sounds, like saying "wabbit" for "rabbit."
• Leaving sounds out, like saying "nana" for "banana."
• Adding extra sounds, like saying "buh-lue" for "blue."

These are expected in a preschooler. It's only more of a concern when the same mistakes stick around as your child gets older. Cluster mix-ups like "spway" for "spray," and imperfect late sounds (l, r, j, s, sh, ch, th, v, z) at age 4, are also normal.

Some signs, though, are worth a closer look. Call your pediatrician if you notice any of these:

• By age 2, your child uses very few real consonant sounds and mostly vowels. (By age 2 you should be hearing real consonants like p, b, m, h, w, d, n, not just vowel sounds.)
• By age 3, strangers can't understand your child.
• At age 4 or older, your child's speech is still hard to understand.
• Your child drops many sounds or leaves off the ends of words well past the expected age.
• Your child has trouble with a sound long past its chart age. For example, no k or g sound by age 4.
• You have any concern about hearing. For example, your child doesn't respond to their name, needs the volume turned up, or has frequent ear infections along with unclear speech.

Frustration is worth mentioning too. Some children act out because they can't get their words across. If your child seems upset when they aren't understood, that's another good reason to check in.

When Should I Call My Pediatrician or Request a Speech Evaluation?

If your child's speech is behind the marks above, the most important step is simple: don't wait it out.

A pediatrician plays a real and useful role here. Your pediatrician can:

• Screen your child's development and talk through your specific concern.
• Check your child's hearing, since hearing problems, including hearing loss from repeated ear infections, can affect speech sounds.
• Look for other contributors and help you decide whether a full speech evaluation is the next step.

Here's something many parents don't know: you do not need a pediatrician's referral to get a free speech evaluation. You can start one yourself.

• If your child is under 3: contact your state's early intervention program for a free evaluation.
• If your child is 3 or older: contact your local elementary school and ask to have your child evaluated, even if they don't attend that school. This is a free service from your school district.

A speech-language pathologist (SLP) is a therapist trained to test and treat speech and language. The SLP does the formal evaluation. During it, the SLP listens to how your child says sounds, watches how the lips, jaw, and tongue move, and usually checks hearing too. Sometimes the SLP finds there's nothing to worry about, and that peace of mind is worth it.

A Blueberry pediatrician can review your concern, ask about possible contributors like hearing problems, and help you decide whether a speech evaluation is the right next step. Blueberry pediatricians screen and guide you to the right care. They are not speech therapists and don't provide speech therapy themselves.

Do Ear Infections Affect Speech Sounds?

Parents often ask whether ear infections cause speech problems. The honest answer is more reassuring than you might expect.

Hearing and speech go together, because a child learns sounds by hearing them. That's why your pediatrician will check your child's hearing when speech is a concern, especially after repeated ear infections or when fluid has been sitting behind the eardrum for months. Doctors call this fluid otitis media with effusion (fluid behind the eardrum).

But here's the reassuring part: most ear infections clear up without any lasting effect on speech. A large study followed otherwise healthy children for years. It randomly assigned some to get ear tubes promptly and others to wait up to nine months, and found no difference in how their speech turned out. So an ear infection is a reason to check hearing, not a reason to assume speech will suffer.

How Can I Help My Child's Speech Sounds at Home?

You don't need special tools to support your child's speech. A few simple habits help most:

• Model the sound, don't drill it. If your child says "wabbit," just say "rabbit" back naturally in your reply. Repeat the correct sound and skip the "say it right" pressure.
• Read together every day. Books expose your child to new words and sounds in a fun, low-stress way.
• Narrate your day. Talk out loud about what you're doing, like "I'm washing the red cup," so your child hears clear, everyday speech.
• Give them time to talk. Pause and let your child finish. Rushing or finishing their sentences can add frustration.

For more ideas, see our guide on simple strategies to help your child develop speech.

Frequently Asked Questions

At what age should a child say each sound?

Most children say p, b, m, n, h, w, and d by age 3; k, g, f, t, "ng," and y by age 4; s, z, sh, ch, l, v, and j by age 5; r and the th in this by age 6; and the th in thumb by age 7. See the chart above for examples.

What sounds should a 2-, 3-, 4-, or 5-year-old say?

Read the chart cumulatively. A 4-year-old should have all the early sounds, the middle sounds, and most of the age-5 sounds coming in. A 2-year-old should be using real consonants like p, b, m, h, w, d, and n, not just vowels.

Why can't my child say the "r," "s," "l," or "th" sound yet?

Because those are among the last sounds to develop. The r and voiced th aren't expected until ages 5 to 6, and the th in thumb can take until age 7. A preschooler who misses these is usually right on track.

Is it normal for my 3-year-old to be hard to understand?

Partly. A 3-year-old is typically about three-quarters understandable to someone who doesn't know them. If a stranger understands very little of what your child says at age 3, check in with your pediatrician.

What's the difference between a speech delay and a speech sound problem?

A speech sound problem (also called articulation, or how we form sounds) is about clarity. The words are there but come out wrong. A language delay is about how much your child understands and says. A child can have one, the other, or both. For more on delays, see our guide on toddler speech delay.

Do ear infections affect speech sounds?

Ear infections can affect hearing, and hearing matters for learning sounds, so your pediatrician will check hearing after repeated infections. But most ear infections clear up with no lasting effect on speech.

When should I see a speech therapist (SLP)? Do I need a referral?

You don't need a referral. If your child is under 3, contact your state's early intervention program; if 3 or older, contact your local school district. Both offer free evaluations you can request yourself.

Can a pediatrician help with speech sound concerns, or only an SLP?

Both, with different jobs. The pediatrician screens the concern, checks hearing, looks for contributors, and helps you decide on next steps. The SLP does the formal speech evaluation and any therapy.

Is "baby talk" or mispronouncing words a problem?

Usually not at the ages on the chart. Swapping, dropping, and adding sounds are all normal parts of learning. It becomes a concern when the mistakes stick around well past the chart age.

Does bilingualism delay speech sounds?

No. Learning more than one language does not cause or worsen speech or language delays. Children learning two languages may pick up some sounds a little earlier or later, and that's normal.

About This Guide

This article is for general education and isn't a substitute for medical advice. If you have concerns about your child's speech, talk with your pediatrician.

Sources

• Crowe, K., & McLeod, S. (2020). Children's English Consonant Acquisition in the United States: A Review. American Journal of Speech-Language Pathology, 29(4), 2155-2169.
• Hustad, K. C., Mahr, T. J., Natzke, P., & Rathouz, P. J. (2021). Speech Development Between 30 and 119 Months in Typical Children. Journal of Speech, Language, and Hearing Research, 64(10), 3707-3719.
• Coplan, J., & Gleason, J. R. (1988). Unclear speech: recognition and significance of unintelligible speech in preschool children. Pediatrics, 82(3 Pt 2), 447-452.
• American Speech-Language-Hearing Association (ASHA). Communication Milestones and public guidance on speech sound development.
• American Academy of Pediatrics & ASHA. How to Raise Concerns about a Child's Speech and Language Development. HealthyChildren.org.
• Centers for Disease Control and Prevention (CDC). Learn the Signs. Act Early.: Milestones by 3 Years.
• Rosenfeld, R. M., et al. (2016). Clinical Practice Guideline: Otitis Media with Effusion (Update). Otolaryngology-Head and Neck Surgery, 154(1 Suppl), S1-S41.
• Paradise, J. L., et al. (2001). Effect of early or delayed insertion of tympanostomy tubes for persistent otitis media on developmental outcomes at the age of three years. New England Journal of Medicine, 344(16), 1179-1187.
• Paradise, J. L., et al. (2003). Otitis media and tympanostomy tube insertion during the first three years of life: developmental outcomes at the age of four years. Pediatrics, 112(2), 265-277.
• Paradise, J. L., et al. (2005). Developmental outcomes after early or delayed insertion of tympanostomy tubes. New England Journal of Medicine, 353(6), 576-586.