Estimated reading time: 7 minutes
ELPAC vs WIDA is a common question for educators who move between states or compare data: California uses the ELPAC, while most states use the WIDA ACCESS assessment. The two measure the same four language domains but differ in standards, levels, and scoring. This guide explains the key differences, what transfers between systems and what does not, and what they mean for districts.
Table of contents
Executive Summary
The ELPAC and WIDA ACCESS do the same job, identify English Learners and measure their English proficiency, but they are different systems. California’s ELPAC is built on the California ELD Standards and reports a Summative overall level from 1 to 4 (aligned to the Emerging, Expanding, and Bridging instructional ranges). WIDA ACCESS, used by 42 states, territories, and agencies, is built on the WIDA ELD Standards and reports six levels (1 Entering to 6 Reaching). Both assess listening, speaking, reading, and writing. Scores do not transfer directly between the two.
Key Takeaways
- ELPAC is California’s test; WIDA ACCESS is used by most other states.
- Both assess listening, speaking, reading, and writing.
- ELPAC reports an overall level 1 to 4; WIDA reports six levels.
- Each is built on its own ELD standards.
- Scores do not convert directly between systems.
ELPAC vs WIDA at a Glance
| Feature | ELPAC (California) | WIDA ACCESS |
|---|---|---|
| Used by | California | 42 states, territories, and agencies |
| Domains | Listening, Speaking, Reading, Writing | Listening, Speaking, Reading, Writing |
| Composites | Oral Language, Written Language, Overall | Oral, Literacy, Comprehension, Overall |
| Levels | Overall 1 to 4 (Emerging/Expanding/Bridging ranges) | 1 Entering to 6 Reaching |
| Standards | California ELD Standards | WIDA ELD Standards |
| Format | Computer-based (Initial and Summative) | Computer-adaptive for grades 1-12 |
Quick answer: ELPAC and WIDA both measure the same four domains, but ELPAC uses a 1 to 4 overall level and WIDA uses six; the scores are not interchangeable.
Why the Difference Matters
For most California districts, the practical impact is small: they use the ELPAC and never touch WIDA. The difference matters in three situations. First, when a student transfers from a WIDA state to California (or the reverse), the receiving state re-identifies them under its own system rather than converting the score. Second, when leaders read national research or compare vendors, they need to know that a “Level 4” in California is not the same as a WIDA “Level 4.” Third, for New York and other states now joining WIDA, understanding both systems helps interpret a transition.
What Transfers and What Does Not
What does not transfer is the score itself: a student’s ELPAC level does not map cleanly onto a WIDA level, so a move across state lines usually means re-identification. What does transfer is the underlying skill. Both systems reward the same thing, real proficiency across listening, speaking, reading, and writing, so instruction that builds a student’s English serves them in either system. The domain that lags in both, and the hardest to build, is speaking.
How the Two Tests Weight the Domains Differently
The clearest technical difference between the systems is how they combine the four domains into an overall score, and it is a difference district leaders comparing data across states should understand. On the Summative ELPAC in grades one through twelve, the overall score is an equal blend: 50 percent Oral Language and 50 percent Written Language. WIDA ACCESS weights the domains unequally, giving literacy far more influence over the overall score.
| Domain | ELPAC overall weight (grades 1-12) | WIDA ACCESS overall weight |
|---|---|---|
| Listening | 25% (half of Oral Language) | 15% |
| Speaking | 25% (half of Oral Language) | 15% |
| Reading | 25% (half of Written Language) | 35% |
| Writing | 25% (half of Written Language) | 35% |
The consequence is meaningful: on WIDA, reading and writing together drive 70 percent of the overall level, so a strong reader and writer can post a high overall score even with weaker speaking. On the ELPAC, oral language carries a full half of the result, so speaking has more leverage over the overall level. WIDA also reports different composites (Oral Language, Literacy, and Comprehension) than the ELPAC’s Oral and Written Language pair, which is one more reason the two overall levels are not interchangeable and should never be compared number to number.
Practical Guidance for Transfer Students
Because scores do not convert, the moment a student moves between a WIDA state and California is where districts most often mishandle EL data. A student arriving from a WIDA state with a prior ACCESS level is not automatically assigned an ELPAC level; California re-identifies the student under its own system, generally beginning with the home language survey and, where appropriate, the Initial ELPAC. A few practices keep this clean.
- Request records early. Prior EL status and program placement inform instruction even when the score itself does not transfer.
- Re-identify, do not convert. Use the receiving state’s process rather than translating an ACCESS level into an ELPAC level.
- Read the domain profile, not just the level. A prior report still shows whether a student was stronger in literacy or oral language, which helps target support from day one.
- Communicate with families. Parents moving from a WIDA state may expect the same six-level scale; explaining California’s 1 to 4 system avoids confusion.
Handled this way, a cross-state move preserves continuity of instruction even though the assessment label changes, because the underlying skills, and especially the speaking gap, are what actually follow the student.
Frequently Asked Questions
What is the difference between ELPAC and WIDA?
ELPAC is California’s English proficiency assessment, built on the California ELD Standards with an overall level 1 to 4. WIDA ACCESS, used by most other states, is built on the WIDA ELD Standards with six levels. Both assess the same four domains.
Do ELPAC and WIDA scores convert?
Not directly. They use different scales and standards, so a student moving between a California and a WIDA state is typically re-identified under the new state’s system.
How many states use WIDA?
WIDA has 42 member states, territories, and agencies; California is one of the few large states that runs its own assessment (the ELPAC) instead.
Which is better, ELPAC or WIDA?
Neither is better; they are state choices. California uses ELPAC; most other states use WIDA. Both measure the same four domains of English proficiency.
Do ELPAC and WIDA weight the four domains the same way?
No. The Summative ELPAC weights oral and written language equally, so each domain contributes about 25 percent of the overall score in grades one through twelve. WIDA ACCESS weights the overall score 35 percent reading, 35 percent writing, 15 percent listening, and 15 percent speaking, giving literacy far more influence.
Do the two tests report the same composite scores?
No. The ELPAC reports Oral Language and Written Language composites, while WIDA reports Oral Language, Literacy, and Comprehension composites. Because the composites are defined differently, the overall levels are not directly comparable.
What happens to a student’s EL status when they move from a WIDA state to California?
The student is re-identified under California’s system rather than having the ACCESS score converted. The district typically starts with the home language survey and, where appropriate, the Initial ELPAC, while prior records still inform instruction.
Related Resources
- AI Tools for English Learners in California
- What Is ELPAC?
- English Learners in California
- Complete Guide to WIDA
- WIDA Levels Explained
- TELPAS vs WIDA
Conclusion
ELPAC vs WIDA comes down to this: same four domains, different systems. California’s ELPAC uses a 1 to 4 overall level on the California ELD Standards; WIDA uses six on its own. Knowing the difference keeps cross-state data clean, and in both systems, the speaking domain is where English Learners need the most help.
Sources: California Department of Education, ELPAC; WIDA ACCESS.
The Skill That Follows a Student Across State Lines
When a family moves from a WIDA state into California, the paperwork resets but the child does not. The new district re-identifies the student under the ELPAC, yet the English that student actually carries, especially the ability to speak and be understood, travels with them regardless of which label the score report uses.
That is why the speaking domain is the honest measure in either system, and also the one districts struggle to build. Reading and writing can be practiced by a whole class at once; a real spoken exchange happens one student at a time, and no single teacher can be everywhere.
So districts look for ways to give every student more time talking, not just more time testing. Telo AI is one example of a tool used toward that end, in English plus Spanish and French for dual language settings.
See how individual speaking practice can scale beyond one teacher: https://mytelo.ai/how-telo-works/
Whatever the assessment is called, the students who arrive fluent are the ones who had many chances to use the language, day after day. That, more than any conversion table, is what carries across state lines.