About this tool

Duolingo English Test Converter

Map Duolingo English Test scores (10-160) to IELTS bands, CEFR levels and derived TOEFL iBT ranges using published concordances.

This converter maps a Duolingo English Test (DET) overall score — reported from 10 to 160 in 5-point increments — to its IELTS band using the concordance Duolingo publishes, plus the matching CEFR level (A1 to C1) and a TOEFL iBT range derived by chaining Duolingo's IELTS mapping with the ETS TOEFL–IELTS linking table. Applicants who took the DET for university admission use it to see how their score reads against IELTS- or TOEFL-based requirements.

How to use Duolingo English Test Converter

1. 1

   Open Duolingo English Test Converter on AltFTool — it loads instantly in your browser.

2. 2

   Enter the values you already know.

3. 3

   Fine-tune the options to match your scenario.

4. 4

   Read the result and use it in your planning or reporting.

Why use Duolingo English Test Converter

• Published concordance

  The IELTS mapping is Duolingo's own comparison scale — DET 115–120 aligning with IELTS 7.0 — not a guess.

• CEFR included

  See the A1–C1 level Duolingo assigns to each score range, useful for European admissions.

• Transparent TOEFL estimate

  The TOEFL range is clearly labelled as derived via the ETS linking table, not presented as official.

Common use cases

• An applicant with DET 120 checking whether it satisfies a university's IELTS 6.5 minimum before paying for another test
• A student comparing DET, IELTS and TOEFL requirements across universities to pick the cheapest test that clears all of them
• A counsellor translating a client's DET 105 into the CEFR level a European university lists in its admission rules

Frequently asked questions