Speech and Language Norms for Age 3
Three is the year early grammar locks in. Brown's early morphemes (-ing, plural -s, in/on) stabilise and sentences grow from two to three or four words. Intelligibility jumps markedly — unfamiliar adults should now understand about three of every four utterances in connected speech.
Quick reference — age 3 norms
| Metric | Typical value at age 3 | Source |
|---|---|---|
| MLU (morphemes) | 3.1 (range 2.4–3.8) | Rice et al. 2010 / SUGAR 2017 |
| NDW per 100 words | 43 | Miller 1991 (SALT) |
| Type-Token Ratio | 0.46 | Templin 1957; Watkins 1995 |
| Percent Consonants Correct | 70% | Shriberg & Kwiatkowski 1982 |
| Intelligibility to strangers | 75% | Coplan & Gleason 1988; Hustad 2021 |
| Brown's stage | Brown's Stage II to Stage III | |
Values are central estimates. Individual variation is wide — a child who falls a little outside the typical range is not automatically delayed. Use these as one input alongside direct assessment.
Language milestones at 3
- Uses 3- to 4-word telegraphic and simple sentences
- Asks "what" and "where" questions frequently
- Uses present progressive -ing and plural -s consistently
- Follows two-step unrelated directions without gesture
- Names colours on request (at least 2)
- Talks about events that happened today
Speech-sound milestones
- Acquires /k g t d f/ in word-initial position
- Fronting (/k/→/t/) fading but still common early in the year
- Final consonant deletion fading
- Unstressed syllable deletion ("nana" for "banana") fading
Clinical guidance
The SUGAR protocol treats 3;0 as the earliest age for reliable conversational sampling. If you are pulling your first language sample this is the year MLU-morphemes becomes a defensible metric rather than a noisy estimate. Error patterns at 3 should be analysed by phonological process rather than by individual sound — stopping of fricatives, fronting, and cluster reduction are all still developmentally expected early in the year but should fade by the child's fourth birthday. Receptive-expressive gap is worth measuring at this age: children whose receptive language is markedly stronger than expressive often catch up, while those with flat profiles more often qualify for ongoing services.
“By 3;6 most kids have dropped fronting and final-consonant deletion. If both are still dominant processes, it is time to screen for phonological disorder rather than chalk it up to "he will grow out of it".”
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Red flags at age 3
The items below warrant a referral to a speech-language pathologist for a full evaluation. Any single item is enough to justify a conversation — do not wait for multiple flags to stack up.
- MLU below 2.0 morphemes
- Intelligibility below 50% to unfamiliar listeners
- Does not combine words into phrases
- Frequent frustration over not being understood
- Still uses all nouns, no verbs or descriptors
Tools to use with this age group
MLU Calculator
Paste a language sample and get Mean Length of Utterance in morphemes and words, total utterances, total morphemes, and the matching Brown's stage. Implements Brown (1973) morpheme counting rules and runs entirely in your browser.
Open toolBrown's Stages Lookup
Interactive reference for Brown's (1973) five stages of grammatical development. Look up a stage by child age or MLU, see the MLU range, acquired morphemes, example utterances, and clinical milestones for each stage.
Open toolPhonological Process Identifier
Free interactive phonological process identifier for speech-language pathologists. Enter a target word and the child production and the calculator flags every matching process from the twelve most common English patterns (cluster reduction, fronting, stopping, gliding, vocalisation, weak syllable deletion, final consonant deletion, deaffrication, denasalisation, prevocalic voicing, devoicing, initial consonant deletion), each tagged with its Bowen (2015) age of suppression so you can see whether the production is age-expected or persistent. Mobile-friendly, client-side, no sign-up.
Open toolSUGAR Norms Lookup
Interactive lookup for SUGAR (Pavelko & Owens 2017) language sample normative values. Enter the child's age in years and months and the tool returns the matching MLU, TNW, CPS, and MLUL means with ±1 SD typical ranges plus the full SUGAR table for context. Built for speech-language pathologists running 50-utterance samples.
Open tool