Duolingo English Test Guide: Format, Scores, Test Sections, and Preparation

Key takeaways

• The Duolingo English Test (DET) is an online, at-home English proficiency test that takes approximately one hour and produces results within two days.
• Scores range from 10 to 160, with four subscores: Literacy, Comprehension, Conversation, and Production.
• The test adapts in real time to your performance, with question difficulty adjusting based on your answers.
• Over 5,000 institutions worldwide accept the DET, including many in the United States, Canada, Australia, and Europe.
• The at-home format with camera supervision and the adaptive question format make DET preparation different from other English tests.

The Duolingo English Test has changed the English proficiency testing landscape significantly since its widespread adoption. A one-hour test taken on your own laptop, with results in two days and acceptance at thousands of universities, is a genuinely different proposition from booking an IELTS test centre slot weeks in advance.

The DET is now a legitimate alternative for many institutions, not a backup option. But its adaptive format and at-home delivery require specific preparation that differs from traditional exam prep.

With 15+ years helping language learners worldwide, italki has English teachers who know the DET format, help you understand the adaptive scoring logic, practise the specific task types, and prepare for the certification interview section that trips up many test-takers.

With many institutions worldwide accepting DET, it has become a practical pathway to college admission and professional qualification. This guide covers the DET format, how the scoring works, what the subscores measure, and how to prepare.

What is the Duolingo English Test?

The Duolingo English Test (DET) is an adaptive English language proficiency test developed by Duolingo. It was launched in 2019 and has grown rapidly in institutional acceptance, particularly after universities expanded their acceptance of alternative tests during the 2020 pandemic period.

The DET is taken at home on a laptop or desktop computer using Google Chrome. A camera records you throughout the test to verify your identity and ensure test integrity. The test includes a supervised adaptive section (approximately 45 minutes) followed by a video interview section (approximately 10 minutes). Results are available within two business days.

The DET is accepted by over 6,500 institutions worldwide, including major universities in the United States, Canada, Australia, the United Kingdom, and Europe. However, acceptance varies by institution and program. Some institutions that accept the DET require a minimum overall score; others also require minimum subscores.

Understanding DET’s specific format removes uncertainty from your test day. Practice with an online English tutor who knows the adaptive format to build your confidence.

DET adaptive test format

The main test adapts in real time to your performance. When you answer a question correctly, the next question increases in difficulty. When you answer incorrectly, difficulty decreases. This means no two tests are identical, and the adaptive algorithm builds an efficient picture of your ability across the test.

The adaptive section lasts approximately 45 minutes and includes a range of task types cycling through reading, writing, listening, and speaking skills.

Task types in the adaptive section include:

• Read and complete: Fill in missing letters to complete words in a sentence.
• Read and select: Identify which words are real English words from a list.
• Listen and type: Listen to a sentence and type what you hear.
• Read aloud: Read a sentence aloud after seeing it briefly on screen.
• Repeat the sentence: Listen to a sentence and repeat it aloud.
• Write about the photo: Describe a photograph in one or more sentences.
• Speak about the topic: Respond verbally to a prompt in 30-90 seconds.
• Write about the topic: Respond in writing to a topic prompt (50-200 words).
• Read, then write: Read a brief passage and then write a response (50-200 words).
• Listen, then speak: Listen to a passage and then respond verbally.

Video interview section

After the adaptive section, the test includes a video interview that is reviewed by Duolingo and sent to institutions. It is not algorithmically scored but is reviewed by Duolingo staff and shared alongside your score report. The interview consists of 1-3 open-ended questions and speaking samples. Test-takers are given time to prepare their responses before recording.

Work through DET practice questions with an English tutor online and do practice video interviews. Get feedback on your speaking so you feel confident and ready when test day arrives.

DET scoring

The overall DET score ranges from 10 to 160\. Results also include four subscores, each ranging from 10 to 160\.

Subscore	What it measures
Literacy	Reading and writing accuracy, including grammar and written expression
Comprehension	Ability to understand spoken and written English
Conversation	Ability to produce and understand spoken English in real-time contexts
Production	Ability to produce coherent written and spoken English

The four subscores represent intersecting skill pairs rather than isolated skills. Comprehension includes both reading and listening. Production includes both writing and speaking. Some institutions require minimum subscores in addition to an overall score, so knowing which subscores matter for your target institution before you prepare is important.

CEFR approximate equivalences:

DET score	CEFR level
130-160	C2
115-125	C1
90-110	B2
65-85	B1
45-60	A2
10-40	A1

Most universities that accept the DET set minimum scores between 100 and 120\. Confirm the current requirement for your specific program before preparing for a target score.

Find English teachers online who will map out a focused preparation plan based on your target score.

Technical requirements and test environment The DET must be taken on a laptop or desktop with:

• A built-in or external camera
• A microphone
• Google Chrome browser installed
• A reliable internet connection
• A quiet, private room with adequate lighting

The test environment is monitored throughout. You cannot use a phone, notes, or any external materials. The room must be quiet and you must be alone. You cannot pause the test once it starts. Technical failures during the test are handled by contacting Duolingo support.

How to prepare for the DET

DET preparation is most effective when you practise the specific task types rather than relying on general English improvement.

For Read and Select tasks, practise distinguishing real English words from plausible non-words. This tests your implicit vocabulary knowledge at a level that goes beyond knowing definitions. Reading widely in English over time is the best long-term preparation, but practising the specific task format before the exam builds the fast recognition the task requires.

For Listen and Type tasks, accuracy in transcription matters. Spelling errors and missing small words reduce your score even when your overall comprehension is correct. Practising dictation with short spoken sentences builds the precision this task rewards.

For speaking tasks (Read Aloud, Repeat the Sentence, Speak About the Topic), consistent delivery and clear pronunciation matter more than a native accent. The adaptive algorithm assesses fluency alongside accuracy. Practising speaking English continuously without stopping to self-correct trains the fluency the speaking tasks reward.

For writing tasks (Write About the Topic, Read Then Write), coherent paragraph structure and relevant content within the word count are the key requirements. Practising short written responses on a range of topics, then timing yourself to write within the DET’s word limits, builds the stamina and efficiency the task requires.

For the video interview, practise speaking on open-ended topics for 1-3 minutes without scripted preparation. The interview is reviewed by a human, not scored by algorithm, so natural, confident spoken English matters more than optimising for AI-scored patterns.

Run mock DET tasks with an English tutor on italki, including timed speaking and writing practice, to simulate the adaptive pressure of the real test.

DET validity

DET scores are valid for two years from the test date. For immigration applications, some authorities do not yet accept the DET. For university admission, always confirm that your target institution and program accepts DET and what the current minimum score is, as acceptance lists and score requirements update regularly.

For over 15 years, italki has connected language learners across 190+ countries with teachers who understand exam requirements, including DET specialists who know exactly what examiners expect. Book a trial lesson on italki today.

FAQ

Is the Duolingo English Test accepted for US university admission?

Yes. Many US universities accept the DET, including a significant number of research universities and graduate programs. Acceptance varies by institution and program. Some institutions accept DET for international student admission but not for specific graduate programs with different requirements. Always check the specific program’s English proficiency requirements directly on the institution’s admissions page before registering.

How is the DET different from IELTS or TOEFL?

The DET is taken entirely at home on your own computer and takes approximately one hour. IELTS and TOEFL require in-person attendance at a test centre. DET results are available within two business days. IELTS paper results take 13 days; TOEFL results take approximately 6 days. The DET is adaptive, meaning question difficulty changes based on your performance, while IELTS and TOEFL have fixed formats. The DET is generally less expensive than IELTS or TOEFL. IELTS and TOEFL have broader global institutional acceptance, but DET acceptance has grown significantly.

What happens if I have technical problems during the Duolingo English Test?

If a technical problem occurs during the test, you should contact Duolingo support immediately. Duolingo has a support process for test interruptions. You may be eligible for a free retest depending on the nature and timing of the issue. Before starting the test, Duolingo requires you to complete a device check to verify that your camera, microphone, and internet connection meet the requirements, which reduces the likelihood of technical failures.