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IELTS vs Duolingo English Test: Acceptance and Difficulty

Bands & Scores29 August 2026 · 7 min read · WiderAI Team

The Duolingo English Test (DET) is a short, adaptive English test you take at home on your own computer, scored on a 10–160 scale. IELTS is a longer, four-section exam taken at a test centre (or, for some formats, online under supervision), scored on the 0–9 band scale, with a human examiner for Speaking. The DET is cheaper and faster; IELTS is accepted in far more places, especially by governments.

That last point settles most decisions. Thousands of universities — particularly in the USA and Canada — accept the DET for admissions. But for visas, migration and professional registration, official bodies overwhelmingly require an approved secure test, and IELTS is on almost every such list while the DET is on very few. If your plan includes a visa route that names its accepted tests, check that list first: it may make this whole comparison irrelevant.

If both tests genuinely are accepted everywhere you are applying, then the choice comes down to difficulty, cost and risk — and the honest picture there is more balanced than either fan club admits.

Who actually accepts the Duolingo English Test?

Acceptance is the DET's strength and its weakness at once. On the strength side, a large and growing number of universities accept it for admission, and many admissions offices like it because applicants can test quickly from anywhere — it became widely adopted when test centres were hard to access, and much of that acceptance has remained.

On the weakness side, three groups still mostly require established centre-based tests such as IELTS:

• Immigration authorities. Student, work and migration visa routes in destinations such as the UK and Australia specify approved tests, and those lists are dominated by supervised, centre-based exams. Many students have been caught out by a university that accepts the DET sitting inside a visa system that does not.
• Professional bodies. Nursing, medical, teaching and engineering registration boards typically name a short list of accepted tests and per-section minimums.
• Some universities and departments — acceptance is institution by institution, and a few that accept the DET for admission still require IELTS for scholarship eligibility or for placement decisions.

So the checking order is: visa route first, professional body second, every university third. IELTS acceptance is documented at ielts.org; for the DET, check each institution's own English-requirements page rather than aggregate lists, which go stale.

How does the format and difficulty compare?

The two tests feel completely different to sit.

The DET is short and adaptive. The whole test takes about an hour. Questions adjust to your level: answer well and they get harder, struggle and they get easier. Task types are short and varied — filling gaps, identifying real words, describing images, short speaking and writing samples — and a video interview and writing sample are recorded for institutions to view. Scoring is largely automated, on a 10–160 scale reported in 5-point increments, with results typically available within days.

IELTS is long and fixed. Four full sections test each skill in depth: a 40-question Listening test, three long Reading passages, two Writing tasks including a full essay, and an 11–14 minute live Speaking interview marked by a trained examiner against published criteria.

Which is harder depends on what you find hard:

• The DET's adaptivity means strong candidates quickly face genuinely difficult items — you cannot coast, and the short format leaves no room to recover from a bad patch.
• IELTS demands stamina and technique: close reading of long academic passages, a structured 250-word essay, and question types (True/False/Not Given, matching headings) that punish the unprepared.
• The DET's short tasks reward quick, accurate bursts of English; IELTS rewards sustained, organised production. Many candidates score relatively better on one than the other for reasons that have little to do with overall ability.

There is no official conversion between a DET score and an IELTS band. Institutions publish their own equivalences, and they vary — one more reason to work from each institution's stated requirement rather than a generic chart.

What are the practical trade-offs: cost, speed and risk?

The DET's practical advantages are real: it costs considerably less than IELTS (check current fees on each test's official site — they change), needs no travel, can be booked essentially any time, and returns results within days. For a self-funded applicant facing multiple application deadlines, those are serious points.

But weigh the risks on the same scale:

1. Technical and rule failures. The DET's at-home proctoring rules are strict — eye movement, other people in the room, looking away, unstable internet — and a violated or invalidated session wastes the attempt. A test centre removes this entire category of risk.
2. Narrower acceptance means re-testing risk. If your plans change — a different country, a different course, a visa route you had not considered — an IELTS score is far more likely to still be usable. A DET score may send you back to square one.
3. Less speaking evidence. IELTS Speaking is a live, extended interview; the DET's speaking samples are short and recorded. Some admissions tutors weight the DET's video interview accordingly, and courses with heavy oral demands sometimes ask for more.

Which test should you take?

Use this decision path:

1. Does your visa route or professional body require an approved test? If yes and the DET is not on the list, take IELTS. This decides it for most people heading to the UK or Australia, and for regulated professions everywhere.
2. Do all your target universities accept the DET, in writing, for your specific programme and any scholarships? If not, take IELTS.
3. If both are genuinely accepted everywhere: take the DET when speed and cost dominate — late applications, many schools, tight budget. Take IELTS when you want a score with the widest future validity, when your course involves heavy speaking, or when you test better in a structured centre environment than alone at a webcam.

One thing does not change with the test: the level of English required. Universities set their DET and IELTS thresholds to represent roughly the same ability, so switching tests is not a way to lower the bar — only to change the format you demonstrate it in. Whichever you sit, rehearse under real conditions first: a timed practice run for the DET, or a scored IELTS speaking mock test for IELTS, tells you where you actually stand before you pay for the real thing.