Speech Sound Development Chart
When should your child be able to say each sound? Use this evidence-based guide to understand typical speech sound development.
Source: 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. Ages are when 90% of children produce each consonant correctly.
What about vowels?
Vowels do not follow the same staircase as consonants. Most children have their whole vowel system — all eleven vowels and all five diphthongs — in place by around age three, well before the last consonants arrive, which is why vowel errors in a school-age child are less common and more worth asking about. The exception is the r-coloured vowel in “bird” and “her”: it uses the same tongue shape as /R/, so it waits for /R/.
How to read this chart
Age ranges represent typical mastery
Each column shows the age band in which about 90% of children produce those sounds correctly. Ages are written as years;months, so 4;0–4;11 runs from the fourth birthday to 4 years 11 months. Your child may develop sounds earlier or later and still be within the normal range.
Click any sound for practice tips
Each sound pill links to a detailed guide with word lists organized by position (beginning, middle, end of words), practice sentences, and expert tips from speech-language pathologists.
Earlier sounds build on later ones
Speech sounds develop in a predictable order. Simpler sounds like /P/, /B/, and /M/ lay the groundwork for more complex sounds like /R/ and /S/ blends. If your child is struggling with later sounds, make sure the earlier ones are solid first.
What if my child is behind?
First, take a breath. Every child develops at their own pace, and this chart shows averages, not hard deadlines. Many children catch up naturally with just a little extra practice.
That said, if your child is consistently struggling with sounds that most children their age have already mastered, it may be worth consulting a Speech-Language Pathologist (SLP) for a professional evaluation.
In the meantime, you can start practicing at home right now. Our games make speech practice feel like play (try them free for 7 days, no card needed), and consistent short sessions (just 5-10 minutes a day) can make a real difference.
Early intervention matters
Research shows that children who receive early speech support make faster and more lasting progress.
Practice makes progress
Just 5-10 minutes of daily practice can dramatically accelerate speech sound development.
Fun beats frustration
Game-based practice keeps children motivated and engaged, leading to better outcomes than traditional worksheets.
Frequently asked questions
What does 'mastered' mean on the speech sound development chart?
A sound is considered 'mastered' when 90% of children at that age can produce it correctly in everyday conversation. Individual children may master sounds earlier or later than the ranges shown and still be developing normally.
My child is 4 and can't say the /R/ sound. Should I be worried?
Not at all. The /R/ sound is one of the later sounds children master, usually between ages 5;0 and 5;11 (5 years 0 months to 5 years 11 months). At age 4, it is perfectly normal for children to still be developing this sound. Focus on the sounds expected for their age group first.
What do ages like 4;0–4;11 mean?
They are written as years;months. 4;0–4;11 means from a child's fourth birthday up to 4 years and 11 months, so a sound in that column is one that 90% of children say correctly before they turn five.
How do I know if my child needs speech therapy?
If your child is consistently unable to produce sounds that are typical for their age group, or if they are frustrated by their communication, it may be time to consult a Speech-Language Pathologist (SLP). An SLP can perform a formal evaluation and recommend whether therapy is needed.
Can I use this chart to practice sounds at home?
Yes! Click on any sound in the chart to see detailed practice tips, word lists, and exercises you can do at home. Keeping practice sessions short (5-10 minutes) and fun is the key to progress.
Are speech sound development milestones the same in every language?
No. Speech sound development varies across languages because different languages use different sets of sounds. This chart is based on English-speaking norms. If your child is bilingual or learning English as a second language, some variation is expected and normal.