The Duolingo English Test (DET) is a computer-adaptive English proficiency test that you take entirely online, from your own computer, with results typically available within days rather than weeks. It's become a genuine third option alongside IELTS and TOEFL for university applicants — not a niche alternative, but not yet a full replacement for the two established tests either. This guide explains what the DET actually is as a standalone test, before you get into the comparison details covered elsewhere on this site.
The Core Difference: Fully Online, From Home
The single most structurally different thing about the DET, compared to IELTS and TOEFL, is where and how you take it. IELTS is taken at an official test centre (with a home-delivered IELTS Online option now available in some markets), and TOEFL offers both test-centre and Home Edition options. The DET, by contrast, was built from the start to be taken entirely online, on your own device, whenever a testing slot is available — no test centre booking, no travel, no fixed exam-day schedule beyond choosing a time slot that suits you.
This works through remote proctoring: your webcam and microphone monitor you throughout the test, your screen is recorded, and you can't leave the browser window or use other applications. It's not unsupervised — it's supervised remotely rather than in person.
What this means practically:
- You can take it from anywhere with a quiet room, a working webcam, a stable internet connection, and a government-issued photo ID.
- There's no need to travel to a test centre or work around limited test-date availability in your city.
- You do need to satisfy the DET's technical and environment requirements (a clear desk, no other people in the room, specific browser requirements) — check these on the official DET website before test day, since a failed environment check can disrupt your session.
Format: Mixed Item Types, Not Separate Sections
IELTS and TOEFL are structured around four clearly separated sections — Reading, Writing, Listening, Speaking — each with its own block of time. The DET works differently: instead of separate sections, it presents a single continuous test made up of mixed item types that individually draw on reading, writing, listening, and speaking skills, interspersed rather than grouped into blocks.
Adaptive difficulty is the other core mechanic: the test adjusts the difficulty of each subsequent question based on how you performed on previous ones, similar in principle to a computer-adaptive test in other domains. This is part of why the DET can be shorter overall (roughly 45 minutes to an hour) than the multi-hour structure of a full IELTS or TOEFL sitting — it doesn't need a fixed large question bank for every skill at every level, because it narrows in on your actual level as you go.
The test also includes an untimed video interview component and a writing sample at the end, which aren't scored but are sent to institutions alongside your score report, giving admissions staff a further data point beyond the adaptive score alone.
For the specific item types (fill-in-the-blank, dictation, read-aloud, and so on) and a side-by-side comparison of exactly how these map onto IELTS and TOEFL tasks, see our detailed guides: Duolingo English Test vs IELTS and TOEFL vs Duolingo English Test.
Scoring: The 10–160 Scale
The DET reports an overall score on a 10 to 160 scale, along with four subscores (typically covering literacy, comprehension, conversation, and production, drawing on different combinations of the underlying skills). This is a different scale from both IELTS (0–9 bands) and TOEFL (a points-based scale), so scores aren't directly comparable without a conversion reference — universities that accept multiple tests usually publish their own DET-equivalent minimum score alongside their IELTS/TOEFL requirements.
| DET Score Range | Rough Proficiency Level |
|---|---|
| 135–160 | Advanced |
| 105–130 | Upper-intermediate to advanced |
| 85–100 | Intermediate to upper-intermediate |
| Below 85 | Lower intermediate and below |
Treat this table as a general orientation, not a precise conversion — for actual IELTS/TOEFL-equivalent bands at specific score points, see the comparison guides linked above.
Turnaround Time
One of the DET's practical advantages is speed. Results are commonly reported as being available within about 48 hours of completing the test, which is meaningfully faster than the several-day-to-two-week turnaround historically associated with IELTS and TOEFL score reporting. Always check the current stated turnaround on the official Duolingo English Test website when you register, since processing times can shift and occasional delays happen around high-demand application periods.
Cost
The DET has generally positioned itself as significantly cheaper than IELTS or TOEFL — commonly cited in the range of roughly $60–70 USD, compared to figures typically in the $180–250 USD range for IELTS and TOEFL depending on country and test centre. Treat any specific number as approximate: pricing varies by country, changes periodically, and should always be confirmed on the official DET registration page before you budget or plan around it.
Acceptance: Growing, But Not Yet Universal
This is the area where the DET differs most meaningfully from IELTS and TOEFL, and where students most often make planning mistakes. The DET's institutional acceptance has grown rapidly since 2020 and now covers thousands of universities, heavily concentrated among US institutions. However:
- Acceptance is uneven even within the US — some highly selective and traditional institutions either don't accept it or accept it only for certain programs, so a university's general acceptance of the DET doesn't guarantee your specific program does too.
- Outside the US, acceptance is considerably narrower — for UK, Australian, and Canadian university admissions in particular, IELTS and TOEFL remain the more broadly recognized standard, and the DET is often not accepted at all for these.
- The DET is not currently accepted for most visa or immigration purposes — UK Student Route visas, Australian student visas, and Canadian study permits generally require IELTS, TOEFL, or another approved test rather than the DET, regardless of whether your university itself accepts DET for admission.
The practical rule: the DET's acceptance is real but institution-specific and program-specific. Never assume a university accepts it based on general reputation — check the exact admissions page for your specific program, and if you'll need a test for visa purposes as well as admission, confirm the DET actually covers that requirement too (it often doesn't).
For the detailed breakdown of exactly which situations favor DET versus IELTS versus TOEFL — including university-by-university acceptance patterns, immigration requirements, and cost/time trade-offs — see our comparison guides: Duolingo English Test vs IELTS and TOEFL vs Duolingo English Test.
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