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DET
Duolingo English Test
🗣️ English-Language Proficiency Examination Fully online and remotely proctored — taken on a personal computer at home or anywhere with a quiet room and stable internet, using a phone propped up as a second camera to record the whole session. ⏱ Valid: Two years is the window Duolingo certifies a score for. Since 2016 ⚡ Comparable overall to IELTS or TOEFL in terms of English proficiency demonstrated, but the adaptive, algorithm-driven format rewards a different skill: staying calm and consistent under a system that keeps raising the…
🕐 Last updated: September 6, 2026
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Quick Summary

The Duolingo English Test strips English proficiency testing down to its fastest, cheapest form: about 60 minutes, entirely remote, $70, with a certified score back within 48 hours — a fraction of the time and cost of IELTS or TOEFL. An adaptive algorithm adjusts question difficulty in real time and produces a single 10-160 score alongside four subscores, while a mandatory second camera and full room scan keep proctoring strict despite there being no human examiner or test centre involved anywhere in the process. Over 5,800 institutions now accept it, including Harvard, Yale, MIT, and Cornell, though its reach stays concentrated in university admissions rather than the immigration systems that lean on IELTS or CELPIP. Every score report also comes bundled with a recorded, ungraded video interview — a layer of direct, unscripted evidence about a candidate's English that no other major test attaches automatically to every result.

📋 Exam Overview
🎯
Score Range
10 to 160, in increments of 5
💳
Fee
$70
📅
Valid For
Two years is the window Duolingo certifies a score for. What makes DET unusual is what travels alongside that score: a shareable link, live for the same two years, that lets an admissions officer replay the recorded speaking and writing responses rather than trust a bare number alone — a layer of verification most other English tests don't offer.
🖥
Mode
Fully online and remotely proctored — taken on a personal computer at home or anywhere with a quiet room and stable internet, using a phone propped up as a second camera to record the whole session. There's no test centre option at all; DET was built remote-first rather than adapting an in-person exam for online delivery.
🗓
Frequency
Available on demand, essentially any day, since it's entirely remote with no fixed administration dates.
🏛
Conducted By
Duolingo
⚡
Difficulty
Comparable overall to IELTS or TOEFL in terms of English proficiency demonstrated, but the adaptive, algorithm-driven format rewards a different skill: staying calm and consistent under a system that keeps raising the bar after every correct answer, rather than working through a fixed, predictable set of questions.
🌍 Accepted By
Over 5,800 institutions worldwide, including more than 3,100 in the United States alone.
A one-hour, take-from-anywhere English test that costs less than a textbook and returns a score in about 48 hours
👤 Who Should Take This Exam?
DET makes the most sense for someone who needs a proficiency score fast, doesn't have a test centre nearby, or simply can't justify $200+ for IELTS or TOEFL when a competing option runs $70. It's remote by design — no travel, no booking a slot weeks out, just a laptop, a phone as a second camera, and a stable internet connection. That convenience comes with a tradeoff worth knowing upfront: while over 5,800 institutions now accept it, including Harvard, Yale, MIT, and Cornell, coverage still isn't as universal as IELTS or TOEFL, particularly outside university admissions — most immigration authorities don't recognize it the way they recognize IELTS or CELPIP. Anyone applying somewhere that hasn't explicitly listed DET as accepted should confirm before registering rather than assume it.
🎓 Education Level
Undergraduate, Postgraduate, and Professional
🌍 Accepted In
Accepted by institutions across the US UK Canada Australia and beyond though acceptance is set individually by each institution rather than any government body — it currently has little to no role in immigration or visa processes the way IELTS or CELPIP does.
📝 Exam Structure & Format
Question Types
The adaptive section mixes fill-in-the-blank vocabulary, dictation, short written responses, and spoken prompts read into the microphone; the final 10 minutes is an ungraded video sample sent directly to institutions alongside the score.
Language / Medium
English
Total Duration
About 60 minutes total: a 5-minute setup, 45 minutes of adaptive testing, and 10 minutes of ungraded video interview.
Total Questions
Varies by test-taker, since the adaptive engine adjusts both the number and difficulty of items based on real-time performance.
Sections
Introduction, Adaptive Test, Video Interview
⚙️ More format details (timing, marking, equipment)See all ▾
Time Per Section
Introduction 5 minutes, Adaptive Test 45 minutes, Video Interview 10 minutes.
Negative Marking
No
Calculator Allowed
No
Scratch Paper
No — everything happens on-screen with no physical materials permitted.
Breaks Allowed
No
Home Edition
Yes — it is exclusively a home/remote test with no in-person option.
Digital vs Paper
A paper version has never existed for DET, full stop — the test was designed remote-first rather than adapted from an in-person original, which is exactly why it can skip test-centre overhead and undercut IELTS or TOEFL on both price and turnaround.
📑 Section Details
The 5-minute Introduction handles ID verification and equipment checks before anything is scored. The 45-minute Adaptive Test is where the actual score comes from — question difficulty shifts up after a correct answer and down after a wrong one, so no two test-takers see the same set of items. The final 10 minutes, an ungraded video writing and speaking sample, doesn't affect the score at all but gets sent to institutions as a direct, unscripted look at a candidate's English beyond what a number can show.
🎯 Scoring System
Score Range
10 to 160, in increments of 5
Good / Passing Score
Every score between 10 and 160 is a real, reportable result — DET was never built around a pass/fail line, only a scale institutions read against their own published threshold.
How Scoring Works
A single overall score is produced by an algorithm that weighs performance across the adaptive section's mixed item types, alongside separate subscores for Literacy, Comprehension, Conversation, and Production that institutions can view individually. Because the test is adaptive, the score reflects the difficulty level a candidate settled into as much as raw accuracy — someone who answers difficult items correctly reaches a high score faster than someone slowly working through easy ones.
🏆 Minimum Scores for Top Universities
Most institutions accept 100-110, comparable to a mid-band IELTS or TOEFL score, while highly selective master's or Ivy League programs may want 120-130 or higher. Duolingo publishes an official score comparison table institutions use to set these thresholds, but each school still sets its own number rather than following a single fixed conversion.
📊 Section / sub-scoresSee all ▾
Writing
Reported as part of the Production and Literacy subscores rather than a single standalone writing number.
Speaking
Reported primarily through the Conversation subscore, drawn from spoken responses in the adaptive section.
Listening
Reported through the Comprehension subscore, drawn from dictation and listening-based items.
Reading
Reported through the Literacy subscore, drawn from vocabulary and reading-based items.
All Sub-Scores
Literacy, Comprehension, Conversation, and Production, each reported alongside the overall score.
💳 Registration & Fees
Fee (USD)
$70
Fee (INR)
Approx. ₹6,100
~ approx. equivalent
Other
A two-test bundle costs $118 total ($59 each), and a 12-hour expedited results service is available for an additional $40.
📝 Register Now →
📋 Policies (rescheduling, cancellation, verification, waivers)See all ▾
⏰ Register in Advance
No advance booking required in the traditional sense; a test can be purchased and taken the same day, subject to the 21-day scheduling window.
🔄 Rescheduling Policy
There's no traditional reschedule — a purchased test must be scheduled and completed within 21 days of purchase, and missing that window forfeits the attempt rather than allowing a free date change.
❌ Cancellation Policy
Purchases are generally non-refundable once made, though Duolingo has granted exceptions for documented technical failures during the test itself.
📅 Exam Dates & Schedule
📆 Available Months
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
🔁 Frequency
Available on demand, essentially any day, since it's entirely remote with no fixed administration dates.
📊 Results Declared
Within 48 hours of completing the test, or 12 hours with the paid expedited service.
🔄 Retake Policy
Up to three tests within any rolling 30-day period, purchased individually or as the two-test bundle. A new attempt can't be booked until the previous certified result has actually been delivered, so two tests can't run simultaneously.
⏰ Register By
No advance booking required in the traditional sense; a test can be purchased and taken the same day, subject to the 21-day scheduling window.
✅ Eligibility & Access
🎂 Age Limit
None official, though Duolingo recommends the test primarily for applicants 16 and older given the academic and admissions context it's built for.
🎓 Education Required
None
🛂 Citizenship
None
More on accommodations, ID, and special versionsSee all ▾
🪪 ID Required
Yes — a valid government-issued photo ID matching the name used at registration, verified on camera before testing begins.
♿ Accessibility
Accommodations for documented disabilities are available but must be requested and approved before the test is purchased, not on the day itself.
🤝 Disability Accommodations
Available on request through Duolingo's accommodations request process, submitted before purchasing a test.
🗓 Exam Day Guide
✅ What to Bring
A government-issued photo ID, a smartphone or tablet for the mandatory second camera, and a quiet, private room — nothing physical is used during the test itself since everything happens on-screen.
🚫 Prohibited Items
Notes, books, other people in the room, and any device beyond the computer being tested on and the required second camera.
📋 Exam Day Rules
A phone or tablet must be set up beside the computer as a second camera before the test can even begin — there's no way to start without completing that step. Full room visibility is required throughout, and anyone else entering the room during the test, even briefly and by accident, can invalidate the entire attempt.
After the exam: score reporting and deliverySee all ▾
⏱ Score Reporting
Within 48 hours, or 12 hours with the expedited option.
📤 Score Sending
Test-takers can send their official score report, including the ungraded video interview, to an unlimited number of institutions directly from their Duolingo account at no extra charge.
🎓 Score Recipients
Primarily university admissions offices; not commonly used for immigration or professional licensing purposes.
📚 Preparation Guide
🗓 Avg Prep Months
1
Because DET's adaptive engine responds to real-time performance rather than testing from a fixed question bank, the most useful preparation is timed practice under the same adaptive pressure rather than static vocabulary drilling alone. Duolingo's own free practice test mirrors the real adaptive logic, which makes it a more accurate readiness check than third-party materials that can't replicate how the algorithm actually behaves.
💡 Top Tips & Tricks
Get the technical setup — webcam, second camera, internet connection — fully tested well before test day, since failures here can end an attempt before a single question is even answered. During the adaptive section, resist the urge to overthink easier-seeming questions; moving through them confidently helps the algorithm route toward higher-difficulty (and higher-scoring) items faster.
Full study plan, resources, and common mistakesSee all ▾
📅 Study Plan
A one-to-two week runway is realistic for someone already comfortable in English, focused mainly on getting used to the test's specific interface and timing pressure rather than building new language skills from scratch. Taking the official practice test early in that window, rather than the day before, leaves time to address any technical setup issues — like the second-camera requirement — well before the real attempt.
📖 Recommended Books
Because DET is still newer and adaptive by design, dedicated prep books are less established than for IELTS or TOEFL; most effective preparation leans on Duolingo's own practice test and general English fluency practice rather than a specific textbook series.
🏫 Popular Prep Courses
Fewer dedicated third-party courses exist compared to IELTS or TOEFL, given DET's newer, adaptive format; some general English tutoring platforms have added DET-specific modules.
📱 Popular Prep Apps
Duolingo's own app for general English practice, plus the official free practice test through the test's own platform.
✅ Official Practice Tests
Duolingo's free official practice test, built on the same adaptive scoring engine as the real exam. — Free
🆓 Free Online Resources
Duolingo's official free practice test is the single most useful resource, since it's built on the same adaptive engine as the real exam rather than a static approximation of it.
⚠️ Common Mistakes to Avoid
Underestimating the second-camera and room-scan requirements is a frequent first-attempt failure point, since candidates unfamiliar with the setup often discover an issue only once the test has already started. Treating the ungraded video interview as unimportant is another mistake — institutions can and do watch it, so a rushed or careless response there can undercut an otherwise strong numerical score.
💡 EduAtlasHub Exclusive Insights
🔍 Insider Tips
Use the entire time allotted for writing and speaking tasks to demonstrate the full range of your linguistic capabilities.
⭐ Unique Features
DET is the only major English test with a genuinely mobile-first, remote-only design — there's no test centre network at all, none has ever existed, and the entire test costs less than a third of IELTS or TOEFL in most markets. It's also the only one that automatically bundles a recorded, ungraded video interview with every score report for institutions to review directly.
🎓 How This Score Impacts Your Application
A qualifying DET score clears an admissions requirement exactly like IELTS or TOEFL would, but its speed and price mean it's often used as a fast, low-cost first submission when application deadlines are tight, with a candidate later sitting IELTS or TOEFL as well if a specific scholarship or visa process requires it. Because the shareable results link includes the recorded video interview, some admissions committees also treat it as a lightweight interview substitute, weighing it slightly differently than a bare number from another test would be weighed.
More insights: country notes, comparisons, myths, examiner tipsSee all ▾
🌍 Country-Specific Notes
Recognition is strongest in university admissions specifically, particularly in the U.S., UK, and Canada; it has minimal to no role in immigration point systems, unlike IELTS, CELPIP, or PTE, which are all explicitly built into various countries' visa frameworks.
⚖️ Comparison with Alternatives
Against IELTS and TOEFL, DET is dramatically cheaper and faster but covers a narrower slice of use cases, mattering mainly for university admissions rather than immigration. Against PTE, which is also fully AI-scored, DET differs by being entirely remote with no test-centre option at all, while PTE requires an in-person Pearson test centre and carries formal immigration recognition in countries like Australia that DET currently lacks.
🆕 Recent Changes
Duolingo has continued expanding AI-driven interactive speaking questions that respond dynamically to a candidate's answers, moving the test further from static question banks toward genuinely conversational assessment.
🧐 Myths vs Facts
Skeptics sometimes write DET off as a shortcut version of a real English test — its adaptive design and scoring have actually been independently validated against IELTS and TOEFL's own scales, and institutions like Harvard and MIT accept it with no asterisk attached. There's also a assumption that a $70 test must mean lighter supervision; the mandatory second-camera setup and full room scan are arguably more invasive than what a staffed test centre requires.
👨‍🏫 Examiner Tips
Since there's no human examiner and the adaptive engine tracks response time alongside accuracy, moving at a natural, confident pace matters as much as getting individual answers right. The ungraded video interview is genuinely reviewed by some institutions, so treating it with the same seriousness as the scored section — rather than rushing through it once the 'real' test feels over — is worth the extra effort.
📋 Post-Exam Steps
Once the certified result arrives within 48 hours, it can be sent to an unlimited number of institutions directly from the test-taker's account at no additional cost. Anyone planning to retake should wait for that certified result first, since a new attempt can't be booked while one is still pending.
🎯 Score Uses Beyond Admission
Occasionally used by employers or online programs as a quick, low-cost proficiency check, though this remains far less standardized than its role in university admissions.
❓ Frequently Asked Questions
How long is the DET score valid?+
Two years is the window Duolingo certifies a score for. What makes DET unusual is what travels alongside that score: a shareable link, live for the same two years, that lets an admissions officer replay the recorded speaking and writing responses rather than trust a bare number alone — a layer of verification most other English tests don't offer.
How much does the DET cost?+
The exam fee is $70 (approximately Approx. ₹6,100 in India).
How often can I retake the DET?+
Up to three tests within any rolling 30-day period, purchased individually or as the two-test bundle. A new attempt can't be booked until the previous certified result has actually been delivered, so two tests can't run simultaneously.
When are DET results declared?+
Within 48 hours of completing the test, or 12 hours with the paid expedited service.
Which universities accept the DET?+
Over 5,800 institutions worldwide, including more than 3,100 in the United States alone.
Is a calculator allowed in the DET?+
No
How should I prepare for the DET?+
Because DET's adaptive engine responds to real-time performance rather than testing from a fixed question bank, the most useful preparation is timed practice under the same adaptive pressure rather than static…
📝
Register for DET
A one-hour, take-from-anywhere English test that costs less than a textbook and returns a score in about 48 hours
Register Now →
📊 Quick Facts
Official Site →
Conducted ByDuolingo
Year Started2016
CategoryEnglish-Language Proficiency Examination
Emailenglishtest-support@duolingo.com
Last UpdatedSeptember 6, 2026
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