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What are the main differences between the SAT and ACT?

The SAT and the ACT are standardized tests used for college admissions in the United States. While both tests serve a similar purpose, there are key differences between them in terms of structure, content, and focus. Here are the main differences between the SAT and the ACT:

1. Test Structure and Timing


  • Sections: Reading, Writing and Language, Math (No Calculator), Math (Calculator)

  • Total Duration: 3 hours

  • Number of Questions: 154 questions (plus an optional essay, which adds 50 minutes)


  • Sections: English, Math, Reading, Science, and an optional Writing (Essay)

  • Total Duration: 2 hours and 55 minutes (3 hours and 35 minutes with the optional essay)

  • Number of Questions: 215 questions

2. Content Focus


  • Math: Emphasizes algebra, problem-solving, data analysis, and some advanced math topics like trigonometry. There are two math sections: one that allows a calculator and one that does not.

  • Evidence-Based Reading and Writing: Focuses on reading comprehension and understanding of grammar and usage within the context of passages.


  • Math: Covers a broader range of topics including algebra, geometry, and trigonometry. All math questions allow the use of a calculator.

  • English: Emphasizes grammar, punctuation, sentence structure, and rhetorical skills.

  • Science: Includes data representation, research summaries, and conflicting viewpoints. Tests interpretation, analysis, evaluation, reasoning, and problem-solving skills in natural sciences.

  • Reading: Similar to the SAT but tends to have more straightforward questions.

3. Science Section


  • No separate science section, but includes data interpretation and analysis questions within the math and reading sections.


  • Includes a separate science section that tests scientific reasoning and interpretation skills. It does not require specific science knowledge but focuses on understanding and analyzing scientific data and hypotheses.

4. Scoring


  • Scoring Range: 400 to 1600 (sum of two section scores: Evidence-Based Reading and Writing, and Math, each scored from 200 to 800)

  • Subscores: Provided for deeper insights into performance in specific areas.


  • Scoring Range: 1 to 36 (average of four section scores: English, Math, Reading, and Science, each scored from 1 to 36)

  • Composite Score: The average of the four section scores.

  • Subscores: Provided for each section.

5. Essay (Optional)


  • The essay is optional and is scored separately. It asks students to analyze a given argument and evaluate the author's use of evidence, reasoning, and stylistic elements.


  • The essay is also optional and is scored separately. It requires students to evaluate and analyze a complex issue, develop their own perspective, and compare it to other perspectives.

6. Style and Question Types


  • Tends to include questions that require more critical thinking and problem-solving.

  • Includes evidence-support questions that ask students to choose a quote from the passage that best supports the answer to a previous question.


  • Generally considered to have more straightforward questions.

  • Faster-paced with more questions and a shorter total time.

7. Test Dates and Availability


  • Administered seven times a year in the U.S. (typically in March, May, June, August, October, November, and December).


  • Administered seven times a year in the U.S. (typically in February, April, June, July, September, October, and December).

Choosing Between the SAT and ACT

  • Consider Your Strengths: If you excel in science and prefer straightforward questions, the ACT might be a better fit. If you prefer critical thinking and evidence-based questions, the SAT might be more suitable.

  • Practice Tests: Take full-length practice tests for both the SAT and ACT to see which format and question style you are more comfortable with.

  • College Preferences: Some colleges may prefer one test over the other, though most accept both. Check the specific requirements of the colleges you are interested in.

By understanding these differences, you can make a more informed decision about which test aligns best with your strengths and preferences.

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