Choosing between the Duolingo English Test (DET) and TOEFL iBT is one of the most common decisions international students face in 2026. One costs $65 and takes an hour from your couch. The other costs $200+ and requires a 4-hour appointment at a testing center. But price and convenience only tell part of the story.
This guide breaks down every meaningful difference between DET and TOEFL iBT so you can make an informed choice based on your target country, university requirements, and test-taking strengths.
Duolingo English Test vs TOEFL: Quick Comparison
| Feature | Duolingo English Test (DET) | TOEFL iBT |
|---|---|---|
| Cost | $65 | $200-$225 (varies by country) |
| Duration | ~60 minutes | ~116 minutes |
| Format | Online, at home | Test center or Home Edition |
| Score Scale | 10-160 | 0-120 (30 per section) |
| Score Delivery | 48 hours | 4-8 days |
| Test Frequency | Every 21 days | Every 3 days (max 5/month) |
| Skills Tested | Literacy, Comprehension, Conversation, Production | Reading, Listening, Speaking, Writing |
| Accepted By | 5,000+ institutions | 12,000+ institutions |
| Score Validity | 2 years | 2 years |
Score Equivalence: DET vs TOEFL
Most universities publish their own DET-to-TOEFL equivalency, but the general mapping accepted across institutions looks like this:
| DET Score | TOEFL iBT Equivalent | Typical Requirement Level |
|---|---|---|
| 160 | 120 | Top-tier programs (MIT, Stanford) |
| 145-155 | 110-119 | Competitive programs |
| 130-140 | 100-109 | Most graduate programs |
| 120-125 | 90-99 | Standard undergraduate admission |
| 110-115 | 80-89 | Conditional admission / pathway programs |
| 100-105 | 70-79 | Foundation programs |
Test Format Breakdown
Duolingo English Test Format
The DET uses an adaptive format that adjusts difficulty based on your responses. It tests four subscores:
- Literacy — Reading and writing skills combined
- Comprehension — Reading and listening skills combined
- Conversation — Listening and speaking skills combined
- Production — Writing and speaking skills combined
Question types include interactive reading, fill-in-the-blank, dictation, read aloud, write about a photo, and a video interview. The entire test takes about 60 minutes including a 10-minute unscored video interview section.
TOEFL iBT Format
The TOEFL iBT tests four distinct sections sequentially:
- Reading — 20 questions based on academic passages (35 minutes)
- Listening — 28 questions from lectures and conversations (36 minutes)
- Speaking — 4 tasks mixing independent and integrated responses (16 minutes)
- Writing — 2 tasks including an integrated essay (29 minutes)
Total testing time is approximately 116 minutes with no breaks between sections.
Which Test Is Easier to Score High On?
This depends on your skill profile. Students who are strong in reading and writing tend to score proportionally higher on TOEFL because those skills are tested independently. DET blends skills together (Literacy = reading + writing, Comprehension = reading + listening), which can help students whose weaker skills are offset by stronger ones.
For speaking specifically, TOEFL speaking tasks require you to integrate listening and reading material, which many test-takers find challenging. DET speaking is shorter and more conversational. If speaking is your weakest skill, DET may be more forgiving.
However, TOEFL has a longer track record and more preparation materials available. The structured format means you know exactly what to expect in each section.
University Acceptance: Where Each Test Works
| Country / Region | DET Acceptance | TOEFL Acceptance | Recommendation |
|---|---|---|---|
| United States | Widely accepted (Ivy League, state schools) | Universal acceptance | Either works; check specific program |
| United Kingdom | Growing (50+ universities) | Widely accepted | TOEFL safer for UK |
| Canada | Accepted at most universities | Universal acceptance | Either works |
| Australia | Limited (check specific institution) | Widely accepted | TOEFL preferred |
| Europe | Growing acceptance | Widely accepted | Check individual university policy |
A critical point: always verify with your target institution. Acceptance policies change every year, and some programs within an accepting university may still require TOEFL or IELTS specifically.
Cost Comparison Beyond Test Fees
The $65 vs $200+ headline comparison understates the real difference:
| Expense | DET | TOEFL |
|---|---|---|
| Test fee | $65 | $200-225 |
| Score sending | Free (unlimited) | $20 per additional report |
| Retake cost | $65 | $200-225 |
| Travel to test center | $0 (at home) | $10-50+ depending on location |
| Preparation materials | Limited official prep | Extensive (ETS official + third-party) |
| Total for 2 attempts + 5 score sends | $130 | $500+ |
For students on a budget, DET can save hundreds of dollars, especially if multiple attempts are needed.
How to Prepare Effectively for Either Test
Regardless of which test you choose, consistent practice with realistic test conditions is what drives score improvement. AI-powered test preparation platforms now offer unlimited practice tests for both Duolingo English Test and TOEFL iBT that match the exact format, difficulty, and scoring criteria of the real exams.
Key advantages of AI-powered preparation include adaptive difficulty that adjusts to your level, instant AI scoring on speaking and writing tasks with detailed feedback, and the ability to practice unlimited times without running out of material. For speaking practice specifically, Voice AI technology with support for 30+ English accents can help you build fluency and pronunciation confidence before test day.
For comparison posts that can help narrow your decision further, check our detailed guides on comparing test platforms and AI-powered scoring that helps you understand exactly where you stand.
Which Test Should You Choose?
Choose DET if: you want a faster, cheaper test that you can take from home, your target universities accept it, and you prefer an adaptive format that blends skills together.
Choose TOEFL if: your target program specifically requires it, you prefer a structured section-by-section format, you want maximum university acceptance worldwide, or you are applying to Australian institutions.
Still unsure? Take a free diagnostic test to see where your English skills stand across all four skill areas. This helps you understand which test format plays to your strengths before committing to either one.
Ready to start practicing? Try a free practice test for either Duolingo English Test or TOEFL iBT and get your AI-scored results within minutes.
Join the Discussion