DET vs IELTS: Which English Test Should You Take? (2026)

A student walks into her IELTS speaking test. She gets one minute to prepare her answer. She writes notes. She organizes her thoughts. She delivers a polished two-minute response.

She scores a 7.

Three months later, she's in Wisconsin. A classmate asks her opinion on the reading. She freezes. There's no preparation time. No note-taking. No organizing her thoughts in her first language before speaking.

She has nothing to say.

IELTS tested her ability to produce English after thinking. America required her to produce English while thinking.

That's the difference nobody talks about. And it's why we believe DET is the better test for anyone planning to live, study, or work in an English-speaking environment.

DET vs IELTS: Quick Comparison

The Core Difference

Both tests measure English. But they measure different kinds of English.

IELTS measures prepared production. In the speaking test, you get one minute to prepare your long response. You can write notes. You can mentally translate from your first language, organize your ideas, then deliver them in English. The reading and writing sections give you time to sit, process, and produce carefully.

DET measures on-demand production. Tasks come at you mixed and fast. You don't know what's next. You have seconds to respond, not minutes. There's no time to translate in your head. Either English comes out, or it doesn't.

This isn't a small difference. It's the difference between performing English and using English.

DET to IELTS Score Conversion

How do the scores compare? Here's the conversion based on official concordance data:

The Task That Reveals Everything

DET has a task that no other major English test includes: Is This a Real Word?

You see a word on screen. You have five seconds. You click Yes or No.

That's it.

Some words are real English words. Some are fake—invented words that look like they could be English but aren't. You can't sound them out. You can't translate them. You can't use context clues. You either recognize the word instantly, or you don't.

This task tests something IELTS never touches: systemic English acquisition.

If you've truly acquired English—if you've read widely, listened deeply, used the language in real contexts—real words feel familiar. They sit in your brain the way words in your first language do. You don't need to think. You know.

If you've only studied English—memorized vocabulary lists, practiced test formats, learned grammar rules—fake words slip through. You're not sure. You guess.

What We See in Our Students

We work with exchange students in America through placement programs. These aren't hypothetical examples—they're students we teach every week.

Here's the pattern: Students who prepared for IELTS show improvement in reading and writing. Their speaking and listening? Often unchanged. Because reading and writing are "sit and ingest" skills—you can practice them alone, at your own pace. Speaking and listening require real interaction. No test prep replaces that.

One student—Marton from Hungary—arrived in Wisconsin with strong analytical skills. In Hungary, he was good at math, good at logic. His test scores said he was ready.

But when we asked him to read a paragraph and explain what it meant, he couldn't. He'd decode the words slowly, one by one, then have no idea who did what to whom. He was translating in loops instead of processing directly.

Another student—Bataar from Mongolia—insisted grammar was his issue. He wanted rules, structures, verb tenses. But his real problem was different: he couldn't prove his answers. He'd give a response but couldn't point to evidence in the text. He'd make a claim but couldn't explain why it was true.

Both students would have passed IELTS with preparation time. Both struggled in American classrooms without it.

The test got them in. It didn't prepare them to stay.

Why This Matters for America

The United States is one of the most linguistically mixed countries in the world. In any classroom, workplace, or neighborhood, you'll encounter people from dozens of language backgrounds, all using English as the common ground.

Nobody slows down. Nobody gives you preparation time. Nobody waits while you mentally translate.

DET mirrors this reality. IELTS doesn't.

What About Academic Writing?

Some argue that IELTS tests "Cognitive Academic Language Proficiency"—the formal English needed for academic work. The essay task gives you 40 minutes to produce a structured argument.

But here's the reality: even native English speakers get time to prepare academic writing. Nobody produces polished essays in real time. You get a deadline, you draft, you revise. That's how academic writing works.

So testing timed essay production doesn't predict academic success any better than DET's writing tasks. What predicts success is whether you can think in English when you don't have time to translate—and DET tests that directly.

When to Take IELTS Instead

We're not saying IELTS is worthless. Take IELTS if:

• Your target institution specifically requires it. Some UK universities won't accept DET. Check your requirements first.
• You're applying to UK immigration. IELTS UKVI is accepted for UK visas; DET currently is not.
• You're applying to Australia or New Zealand immigration. These countries require IELTS or PTE for visa purposes.
• Your employer requires it. Some professional licensing boards only accept IELTS.

But if you have a choice—and for most US universities, you do—take DET.

What the Scores Actually Mean

A DET score of 120 roughly corresponds to an IELTS 6.5. But they're measuring different things.

An IELTS 6.5 means: "This person can produce coherent English when given time to prepare."

A DET 120 means: "This person can produce coherent English on demand, across unpredictable tasks, without preparation time."

Which one sounds more like what you'll face in an American classroom?

That said, a passing score on either test doesn't mean you're ready. Both tests set minimums that universities accept—but meeting the minimum doesn't mean you'll thrive. We recommend aiming for 120+ on DET (or 7.0+ on IELTS) before committing to study in the US.

For a complete breakdown of what different scores mean, see our DET Score Guide.

Our Recommendation

If you're planning to study or live in the United States, take DET.

Not because it's easier—it's not, for many students. Not because it's cheaper—though it is. Not because it's faster—though that helps too.

Take DET because it tests what actually matters: your ability to use English in real time, without preparation, across unpredictable situations.

That's what America requires. That's what DET measures. And that's why we believe it's the better test for anyone serious about succeeding in an English-speaking environment.

Universities Accepting DET

If you're wondering whether your target university accepts DET, we've compiled a complete list of 5,500+ institutions worldwide that accept DET scores, organized by region with minimum score requirements.

Most major US universities—including all Ivy League schools, the UC system, and top public universities—now accept DET. The list continues to grow as institutions recognize that DET predicts real-world English ability better than traditional tests.

Further Reading

• Duolingo English Test Score: Complete Guide
• Universities Accepting DET: Complete 2025 List
• How to Prepare for the Duolingo English Test
• DET Requirements: Format, Time & Everything You Need