Duolingo English Test (DET) has gone from a 2020 pandemic stopgap to a serious IELTS / TOEFL alternative for many Sri Lankan applicants by 2026. USD 65 vs USD 250, fully online from your laptop, 60 minutes vs IELTS’s 2 hours 45 minutes, and results in 2 days vs 13. The catch is acceptance — DET is taken by 5,000+ universities but not by all of them, and some that accept it do so only as supplementary rather than primary evidence. Here is when to choose DET and where it will actually work.

What DET actually is

DET is a 60-minute computer-adaptive English proficiency test taken at home on your own laptop. The test uses your webcam and microphone, with a Duolingo-trained AI proctor monitoring for irregularities. Tasks include read-aloud, listen-and-type, write-a-short-essay, speak-on-a-prompt, and grammar / vocabulary exercises. Results — a single 10–160 score plus four subscores (Literacy, Conversation, Comprehension, Production) — are released in 48 hours and can be sent to unlimited universities for free.

The test cost is USD 65 (~LKR 20,800). You can retake the test after 3 days. There are no test centres — you take it whenever you want, wherever you have a quiet space and a working webcam / mic. This is the largest single difference vs IELTS / PTE / TOEFL: no booking lottery, no Colombo travel, no Saturday-morning test slots.

Where DET is accepted

Acceptance varies by country and university tier. As of 2026, DET is broadly accepted at:

• check_circle USA — wide acceptance including all Ivies, top-30 universities, and most state schools (Yale, Princeton, Stanford, Columbia, UPenn, MIT, Carnegie Mellon, NYU, USC, all UC system, all top-20 LACs)
• check_circle UK — most Russell Group except Oxbridge (Manchester, Edinburgh, KCL, Bristol, Birmingham, etc.); many post-92 universities also accept. Cambridge does not yet; Oxford accepts case-by-case
• check_circle Canada — wide acceptance including U15 (Toronto, McGill, UBC, Waterloo) and most provincial universities
• check_circle Australia — accepted by all Group of Eight and most other public universities for admission
• check_circle Ireland — Trinity, UCD, UCC, NUI Galway, DCU all accept
• check_circle Singapore — NUS and NTU accept for some programmes (verify per programme)
• check_circle New Zealand — most universities accept for admission

Where DET is NOT yet accepted or accepted only patchily: many German public universities (still prefer TOEFL / IELTS for English-taught Master’s), French grandes écoles, some Korean SKY universities, certain professional schools (medicine, law, education) that have regulator-driven IELTS requirements. Always verify per-programme.

Score targets by tier

• check_circle UK / Australia / Canada mainstream — DET 105–115 (IELTS 6.5 equivalent)
• check_circle UK Russell Group postgraduate — DET 115–125 (IELTS 7.0)
• check_circle US Ivy / top-10 — DET 125–135 (IELTS 7.5)
• check_circle Singapore NUS / NTU — DET 115–125
• check_circle Foundation / pathway courses — DET 90–105
• check_circle Most healthcare / nursing programmes — DET 115–125 (often with subscore minimums)

Most university course pages now publish DET equivalencies alongside IELTS / TOEFL. The DET 10–160 scale is roughly: DET 100 ≈ IELTS 6.0, DET 110 ≈ IELTS 6.5, DET 120 ≈ IELTS 7.0, DET 130 ≈ IELTS 7.5, DET 140+ ≈ IELTS 8.0+.

Test format — what 60 minutes looks like

The test runs as a single 60-minute block with three sections: an introduction (5 minutes — webcam / mic checks, ID verification), an adaptive test (45 minutes — mix of task types, harder questions as you answer correctly), and a recorded interview (10 minutes — open-ended speaking on a prompt + a written response). Tasks alternate rapidly; each is timed individually.

• check_circle Read aloud — read a sentence aloud as the test displays it
• check_circle Listen and type — transcribe a spoken sentence
• check_circle Read and select — pick real English words from a mix of real and made-up words
• check_circle Speak on a topic — 30–90 second recorded response to an on-screen prompt
• check_circle Write about a topic — 3–5 minute written response
• check_circle Read and complete — fill in missing letters / words in a passage
• check_circle Listen and select — choose real words from heard audio
• check_circle Speaking sample — 1–3 minute recorded interview at the end

How to prepare

Most Sri Lankan students who score DET 115+ have done 2–4 weeks of structured practice including at least one full timed practice test. The Duolingo Test Prep platform (free) is the primary source — it uses the same task formats as the live test. Supplement with general IELTS / TOEFL reading and writing practice for vocabulary depth.

• check_circle Take a free official practice test in week 1 (duolingoenglishtest.com) to calibrate
• check_circle Practice read-aloud daily for 10 minutes — record yourself, check pronunciation clarity
• check_circle Drill the listen-and-type tasks — most Sri Lankan students lose points to misheard short words (is/are, was/were, the/a)
• check_circle Write timed 3-minute essays on common prompts (education, technology, environment, work, family)
• check_circle For the speaking interview, prepare 3–4 personal narratives (your university, your career goals, a memorable trip) — you can adapt these to most prompts
• check_circle Take 2–3 full timed mock tests in the final week before the real attempt

When DET is the right choice

Choose DET when: your target universities all explicitly accept DET, you do not need a separate test for visa purposes (USA / Australia / Canada / NZ are all visa-OK for admission English; UK Student route requires a separate UKVI test if your university does not self-assess), you want a fast result (3–7 day gap to first university decision vs 2–3 weeks for IELTS), or you have repeatedly underperformed IELTS Speaking with examiner subjectivity concerns.

Choose IELTS or PTE Academic when: any target university only accepts IELTS / TOEFL / PTE, you need the test for UK Student route visa SELT purposes (IELTS for UKVI), your professional registration body requires a specific test (AHPRA, NMC, GMC, OET), or you find computer-based testing difficult.

Common mistakes

• check_circle Booking DET without checking all target universities accept it (some only accept supplementary)
• check_circle Taking the test in a noisy or poorly-lit environment — auto-flagged as suspicious, results may be voided
• check_circle Looking off-screen during the test (the AI proctor reads it as cheating attempt) — keep eyes on screen
• check_circle Underestimating the speaking tasks — most Sri Lankan low scores come from short or whispered audio
• check_circle Not retaking after 3 days when first attempt underperforms — free attempt window goes unused
• check_circle Forgetting to send scores to nominated universities (free, unlimited) — score is useless if not delivered

Next steps

Confirm DET acceptance across all your target universities first; book a test slot only when 100% of your shortlist accepts. Practice for 2–4 weeks with official Duolingo materials, take the test in a quiet daylight space, and use the 3-day retake policy if needed. Our counsellors will validate your DET strategy against your university shortlist at no cost.