The SAT and the ACT are the two standardized tests used in U.S. college admissions. Every American college that considers test scores accepts both equally, so there is no advantage to one over the other in the eyes of admissions officers. The real question is which test suits you. This guide compares the two formats and gives you a simple way to choose.
Quick comparison
| SAT | ACT | |
|---|---|---|
| Format | Digital only, taken on a laptop or tablet using the Bluebook app | Online or paper, depending on the test center |
| Sections | Reading and Writing; Math | English, Math, Reading; Science is optional |
| Scoring | 400–1600 (two sections of 200–800) | 1–36 composite (average of English, Math and Reading) |
| Adaptive? | Yes — the second module of each section adjusts to how you did on the first | No — everyone in a session sees the same questions |
| Calculator | Allowed on the entire Math section; a graphing calculator is built in | Allowed on the Math section |
| Reading passages | Many short passages, one question each | Longer passages with several questions each |
The ACT was redesigned recently. The enhanced version is shorter, with fewer questions, and the composite score now comes only from English, math and reading. Science became an optional section that produces its own separate score.
How the SAT works
The digital SAT takes a little over two hours. Each section is split into two modules. Your performance on the first module determines whether the second module is easier or harder. That design means every question matters, and it rewards students who stay steady from start to finish.
The Reading and Writing section uses short passages — often just a paragraph — followed by a single question about vocabulary in context, the main idea, evidence, grammar or how to improve a sentence. Students who struggle to stay focused on long passages often prefer this style.
The Math section emphasizes algebra, problem solving, data analysis, and some advanced math and geometry. Because a graphing calculator is available on every question, students who are comfortable using one can work faster.
How the ACT works
The enhanced ACT is designed to be completed in about two hours for the three core sections, with additional time if you choose to take science. The English section tests grammar, punctuation and rhetorical skills in passages. The Reading section uses longer passages with multiple questions, so strong, fast readers tend to do well. The Math section covers a broad range of topics, from pre-algebra through some trigonometry.
The optional Science section measures how well you interpret graphs, tables and experiments rather than memorized science facts. Some STEM-focused programs may like to see it, so check the requirements of your target schools before skipping it.
Which test should you take?
The best way to decide is to take a full-length, timed practice test of each. Both are free online: the College Board offers practice SATs through the Bluebook app, and ACT offers free practice tests on its website. Then compare your results using an official SAT–ACT concordance table, which converts scores between the two tests.
As a general guide:
- The SAT may suit you if you prefer short reading passages, like having a calculator for every math question, or perform well on an adaptive, digital format.
- The ACT may suit you if you read quickly, like straightforward questions without an adaptive structure, prefer a paper option, or are strong at interpreting data (if you take science).
- If your scores are similar, pick the test whose format felt more comfortable and whose test dates fit your schedule.
Pick one and commit. Splitting your preparation between both tests usually leads to lower scores on each. Choose one, prepare well and take it up to two or three times.
When to take the test
Most students take their first official test in the winter or spring of junior year. That leaves time for a second attempt in late spring or the summer, and a final attempt in the early fall of senior year if needed. Check the deadlines of your colleges — early application deadlines in November mean your last useful test date is usually in October.
How to prepare without spending a fortune
- Use official free materials first. Khan Academy offers free official SAT practice in partnership with the College Board, and ACT provides free practice tests and resources.
- Review every mistake. Keep an error log of the question type, why you missed it and the correct approach. Patterns will appear quickly.
- Practice under real timing. Pacing is often the difference between scores.
- Study a little, often. Thirty to forty-five minutes a few times a week for two to three months is more effective than cramming.
- Learn the format. Knowing the instructions and question types in advance saves valuable minutes on test day.
Fee waivers and accommodations
Both tests offer fee waivers for eligible students, typically those who qualify for free or reduced-price school lunch or meet other income criteria. Fee waivers can also make you eligible for free college application fees. Ask your school counselor.
Students with documented disabilities can request accommodations such as extended time, extra breaks or assistive technology. Requests take time to process, so apply well before your registration deadline — usually through your school's testing coordinator.
Superscoring and score choice
Many colleges superscore, meaning they take your highest section scores across multiple test dates to create your best possible total. Policies vary: some superscore the SAT but not the ACT, some consider all scores, and some let you choose which scores to send. Look up each college's policy on its admissions website.
Do you even need to take a test?
Many colleges are test-optional, while others require scores. Some highly selective universities that went test-optional have reinstated testing requirements. Before deciding, read our guide on test-optional admissions and whether to submit scores. For the full application timeline, see the U.S. college application process, step by step.
