IELTS (International English Language Testing System) and TOEFL (Test of English as a Foreign Language) are two of the most widely recognized English language proficiency tests. Both tests are designed to assess the English language skills of non-native speakers and are commonly required by universities, employers, and governments around the world. While there are similarities between the two tests, there are also some key differences.

Test Format
The most significant difference between IELTS and TOEFL is the test format. IELTS consists of four modules: Listening, Reading, Writing, and Speaking, and takes approximately 2 hours and 45 minutes to complete. The Listening, Reading, and Writing modules are taken in one sitting, while the Speaking module can be taken up to a week before or after the other modules. TOEFL, on the other hand, consists of four sections: Reading, Listening, Speaking, and Writing, and takes approximately 4 hours to complete. The Reading and Listening sections are computer-based, while the Speaking and Writing sections are conducted via an internet-based platform.

Scoring
Both IELTS and TOEFL use a scoring system to evaluate the proficiency of test-takers. IELTS scores range from 0 to 9, with 9 being the highest score, and the scores are reported in half-band increments. TOEFL scores range from 0 to 120, and the scores are reported in 1-point increments. Both tests require a minimum score to be achieved, depending on the institution or organization requiring the test.

Content
The content of the two tests also differs. While both tests assess the four language skills of Listening, Reading, Writing, and Speaking, the content and format of the questions are different. IELTS often includes more open-ended questions that require test-takers to express their opinions or feelings about a particular topic. TOEFL, on the other hand, includes more multiple-choice questions and is generally seen as more focused on academic English skills.

Accent and Test Takers
Another difference between the two tests is the accent used in the listening sections. IELTS uses a variety of accents from English-speaking countries such as Australia, the UK, and the US, while TOEFL primarily uses an American accent. Additionally, IELTS is more commonly accepted in the UK, Australia, and Canada, while TOEFL is more commonly accepted in the US.

In conclusion, IELTS and TOEFL are both English language proficiency tests used to assess the English language skills of non-native speakers. While they have similarities in their purpose and content, there are also significant differences in their format, scoring, content, accent, and targeted audience. It is important for test-takers to understand these differences to determine which test is the best fit for their specific needs and goals.