SAT, GRE, GMAT, IELTS: Which One You Actually Need

It's worth separating these seven exams into what they're actually measuring before comparing scores or formats. The SAT, GRE, and GMAT are admissions tests: they assess academic aptitude and are used by universities to compare applicants against each other. TOEFL, IELTS, PTE, and Duolingo are English proficiency tests: they measure whether you can study effectively in an English-medium environment, and are frequently required for both admissions and visa purposes. A strong GRE score doesn't substitute for an English test, and a strong IELTS score doesn't substitute for the GRE. Most applications to master's and PhD programs need one of each.

The SAT, a little over two hours and scored 400–1600, is the main undergraduate admissions test for the US, Canada, and some European programs. Nearly 1.9 million students sat it in 2024 alone. The GRE, just under two hours and scored 260–340, covers master's and PhD admissions across the US, Canada, Australia, Germany, and the UK, with over 500,000 annual test-takers. The GMAT, roughly two hours fifteen minutes and scored 205–805, is the standard for MBA admissions, accepted by more than 7,700 programs worldwide.

An increasing number of graduate programs, including some strong ones, have made the GRE optional or dropped it entirely for certain applicant profiles, particularly for students with several years of relevant work experience. Check a specific program's current policy rather than assuming the GRE is universally mandatory, since preparing for and taking an unnecessary exam wastes months you could spend elsewhere in your application.

TOEFL, about two hours and scored 0–120, is accepted in over 160 countries. IELTS, the most widely taken at more than 5.5 million test-takers a year, runs two hours forty-five minutes on a 0–9 band scale and is the default across the UK, Canada, Australia, and the US. PTE, roughly two hours and scored 10–90, delivers results within 48 hours, which makes it attractive when you're working against a tight application deadline. Duolingo's English Test, the fastest at about an hour and scored 10–160, is now accepted by more than 4,500 institutions, though it still isn't accepted for most visa categories.

IELTS remains the safest default specifically because it's the one test accepted almost everywhere, for both admissions and visa purposes, across all four major English-speaking destinations. PTE and TOEFL are strong alternatives once you've confirmed your specific university and visa category both accept them, and Duolingo is best treated as a fast, cheap option for admissions only, not a full substitute for a visa-accepted test.

Match the test to the actual requirement rather than the one that sounds easiest. An admissions test doesn't substitute for an English proficiency test, and a visa office may not accept a test your university does. Confirm both the university's and the visa category's accepted list before you register for anything.

A practical sequencing tip: confirm your visa category's accepted English test before you confirm your university's preferred one. Universities generally accept a wider range of English tests than visa offices do, so anchoring your choice to the more restrictive requirement first avoids the scenario of a test score that gets you admitted but doesn't satisfy your visa application.