iBT

iBT stands for Internet-Based Test of the TOEFL, the online version of the TOEFL standardized English-language proficiency test administered by Educational Testing Service (ETS). It is widely used by colleges, universities, and other institutions to assess the English-language ability of non-native speakers seeking admission or credentials in English-speaking environments. The iBT was introduced in 2005, replacing the earlier computer-based TOEFL format, and has since become the dominant format worldwide. In addition to center-based testing, a Home Edition is available in many locations, permitting remote proctoring.

The test measures four skills: Reading, Listening, Speaking, and Writing. It is administered entirely via the internet at selected test centers or at home for the Home Edition. Total testing time is about three and a half hours, with individual sections lasting: Reading 60–80 minutes, Listening 60–90 minutes, Speaking about 20 minutes, and Writing about 50 minutes. The four section scores are reported on a scale of 0–30, for a total score range of 0–120. Speaking and Writing are scored by trained human raters (often with automated scoring assistance), while Reading and Listening items are scored directly from responses.

Scores are valid for about two years and are accepted by thousands of institutions worldwide, with strong use in the United States, Canada, the United Kingdom, Australia, and other English-speaking countries. The test is offered on multiple dates throughout the year at authorized centers and, in many regions, as a Home Edition.

Preparation resources include official practice materials, sample questions, and preparation courses. Candidates register, select a date, and pay the fee before taking the test.