Duolingo English Test (DET): Format, Scoring and a 4-Week Prep Plan

DET is at-home, fast and cheap — but the format is unlike IELTS or TOEFL. This guide breaks down all 28 question types, the 10–160 scoring scale, the sub-scores, and a focused four-week prep plan built around c-test and Listen and Type.

By PrepLearnio Editorial Team · Published 2026-04-22

DET · Duolingo