SAT vs ACT: how they differ
The SAT and the ACT are both US college admissions tests, and colleges set their own testing policies, so check each college first. The formats differ: the SAT is a digital test in two sections that adapts by module; the ACT has three required sections, is linear, can be taken online or on paper, and offers Science and Writing as optional extras that do not count toward the Composite.
SAT vs ACT at a glance
| SAT | ACT | |
|---|---|---|
| Set by | College Board | ACT |
| Required sections | Reading and Writing: 54 questions, 64 minutes; Math: 44 questions, 70 minutes | English: 50 questions (40 scored), 35 minutes; Math: 45 questions (41 scored), 50 minutes; Reading: 36 questions (27 scored), 40 minutes |
| Optional sections | None | Science (optional): 40 questions (34 scored), 40 minutes; Writing (optional): 1 essay, 40 minutes. Neither counts toward the Composite. |
| Testing time | 2 hours 14 minutes, plus a 10-minute break | About 2 hours 5 minutes for the three required sections; up to 40 minutes more for each optional section |
| Average time per question | Reading and Writing about 71 seconds; Math about 95 seconds | English about 42 seconds; Math about 67 seconds; Reading about 67 seconds |
| Scoring | Total 400–1600; each section 200–800 | Composite 1–36, the average of English, Math and Reading. Taking Science adds a Science score and a STEM score (Math and Science); taking Writing adds an ELA score. |
| Adaptive? | Adaptive by module: in each section, the second module is harder or easier depending on how the first went. Each module includes two unscored pretest questions. | Not adaptive: ACT describes the test as linear, with no mid-test difficulty shifts, online and on paper. |
| How it is taken | Digital, in the Bluebook app. The Desmos graphing calculator is built in for Math, or an approved handheld calculator can be used; no calculator in Reading and Writing. | Online on national test dates since April 2025 and on paper since September 2025; state and district testing moved to the enhanced format from spring 2026. |
How to decide
Neither test is easier across the board, and colleges that consider scores set their own policies. The practical differences are the ones in the table: the SAT has two sections, adapts by module and gives more time per question on average; the ACT has three required sections at a faster average pace, never changes difficulty mid-test, and can be taken on paper. A sound way to decide is to take a timed practice test of each and compare how the format felt and where each result sits against the score ranges your colleges publish.
What differs, and who each may suit
The SAT may suit you if you:
- Want more time per question on average
- Prefer two sections to three
- Are comfortable with a test whose second module depends on the first
- Like having the Desmos graphing calculator built into the test app
The ACT may suit you if you:
- Prefer a linear test with no mid-test difficulty changes
- Want the option of taking the test on paper
- Want to add Science, which gives a Science score and a STEM score outside the Composite
- Work well at a quicker pace across three shorter sections
Frequently asked questions
- Do colleges prefer the SAT or the ACT?
- Colleges set their own testing policies, and many that consider scores accept either test. Check the admissions page of each college on your list.
- Is the SAT easier than the ACT?
- Neither is easier across the board. The SAT has two sections, adapts by module and gives more time per question on average; the ACT has three required sections, is linear and moves faster. Science on the ACT is optional and outside the Composite.
- Is ACT Science still required?
- No. On the enhanced ACT, Science is optional. The Composite is the average of English, Math and Reading only; taking Science adds a Science score and a STEM score.