ACT Exam Guide: Format, Sections and Timing

The ACT is a college admissions test scored on a 1 to 36 scale. The core exam runs 125 minutes across three sections: English, Math and Reading. Those three sections produce your Composite score. Science and Writing sit outside the Composite as optional sections with scales of their own.

This shape is new. ACT rebuilt the exam as the Enhanced ACT and phased it in across 2025 and 2026. The guide below sets out the current section order, the question count and timing of every part, how the Composite is calculated, how the ACT compares with the SAT, and where to start your prep.

The ACT at a Glance

Six facts define the current exam:

• Score scale: 1 to 36 Composite, the average of your English, Math and Reading scores rounded to the nearest whole number.
• Core testing time: 125 minutes for English, Math and Reading combined.
• Section order: English, then Math, then Reading, followed by optional Science and optional Writing.
• Optional Science: 40 questions in 40 minutes, scored 1 to 36 and reported separately.
• Optional Writing: one essay in 40 minutes, scored 2 to 12.
• Delivery: paper and online options both continue.

What the Enhanced ACT Changed

ACT phased the Enhanced version in by testing channel instead of switching every administration on one date. Your test date and testing channel decide which version you sit.

From September 2025 onward, the new Composite built from English, Math and Reading applies to every ACT, whatever the channel. Check your test date against the table above before you plan your prep. Sit a national date now, on paper or online, and you are taking the Enhanced ACT. Sit a school-day test in Spring 2026 or later and you are taking the Enhanced ACT as well, so English, Math and Reading decide your Composite either way.

What is different

Four changes matter for your prep:

• Science left the Composite. It is now an optional add-on scored 1 to 36 and reported on its own.
• Math has four answer choices. Choices dropped from five to four, so a blind guess now lands one time in four.
• The core test is shorter. It runs 125 minutes, down from up to 195 minutes, with 44 fewer questions overall.
• Question counts fell. The core sections now run 50 English questions in 35 minutes, 45 Math questions in 50 minutes and 36 Reading questions in 40 minutes. Reading lost questions without losing clock time, so it now gives you more time per question than English: about 67 seconds against 42.

What stayed the same

Several things did not move, which protects preparation you have already done:

• The scale is still 1 to 36, with no change to ACT benchmarks or state achievement standards.
• Legacy ACT scores are unaffected by the rollout.
• Writing is unchanged: one essay, 40 minutes, scored 2 to 12 on a separate scale.
• The exam stays linear, so difficulty does not shift mid-test.

Section Order and Timing

Every ACT runs the same fixed order. English is first, Math second, Reading third, then the optional Science and Writing sections at the end.

Pacing targets fall straight out of those counts. Practice against these numbers rather than against a stopwatch you check at random:

Taking both optional sections adds 40 minutes for Science and another 40 minutes for Writing on top of the 125-minute core. A full ACT with both add-ons runs 205 minutes of testing, before breaks and check-in time. For state and district school-day testing, English, Math and Reading are completed in one sitting, while flexible policies allow a break before Science and before Writing. Rehearse at the same total length you will face on the day, because stamina over 205 minutes is a separate skill from accuracy over 35.

English

Fifty questions in 35 minutes makes English the fastest-moving section on the test. At roughly 42 seconds per item, one long deliberation costs you two or three other questions. Build the habit of answering and moving on. Depth on question types and strategy sits in our ACT English section guide.

Math

Forty-five questions in 50 minutes, with four answer choices per question instead of the former five. Fewer choices raise the payoff of eliminating one or two options before you guess. Work through our ACT Math section guide for the topic breakdown.

Reading

Thirty-six questions in 40 minutes, and your reading time comes out of the same 40 minutes. Splitting the section by passage keeps you honest on pace. Our ACT Reading section guide covers passage handling and question order.

Science (optional)

Forty questions in 40 minutes, scored 1 to 36 and reported separately from the Composite. Sit it when your target programs want a science score, or when you want the STEM score, which needs a Science result. Details are in our ACT Science section guide.

Writing (optional)

One essay in 40 minutes, scored 2 to 12. The Writing score has no effect on your Composite or on your multiple-choice scores. Read our ACT Writing section guide before you decide to add it.

How the ACT Is Scored

Your Composite is the average of your English, Math and Reading scores, rounded to the nearest whole number. Nothing else enters the calculation. Four worked examples show how rounding behaves:

Rounding shapes where your study hours pay off. One point on a single section moves the average by a third of a point, so a one-point gain lifts the Composite only when the average crosses a rounding boundary. Two sections improving by two points each is often enough to round you up a full Composite point. Look at the third row above: 31, 28 and 30 average 29.67 and round to 30, so the last fraction is worth chasing when you sit near a boundary.

Supplemental scores

Optional sections add two extra reported numbers to your score report:

• STEM score: the average of Math and Science, reported only when you take Science.
• ELA score: the average of English, Reading and Writing, reported only when you take Writing.

Superscoring

The ACT Superscore Composite uses your best English, Math and Reading scores across any test date, legacy or Enhanced. Mixing legacy and Enhanced sittings is allowed, because the 1 to 36 scale did not move with the rollout. Science stays out of the Superscore Composite, though it still feeds a STEM score. A retake therefore pays off section by section: a stronger English result counts even if your Math slips on the same date.

Turn raw section results into scaled scores with our free ACT score calculator. Enter your raw counts per section and it returns the scaled scores and the rounded Composite. For the full walk through score reports and the supplemental scores, read our ACT scoring guide.

Who Takes the ACT, and How It Differs From the SAT

The ACT is a US college admissions test, so the people sitting it are high school students building an application, usually in the junior year and again in the senior year. Applicants from outside the country take it as well, because ACT runs international administrations on the same Enhanced format as the national dates. A large share of test takers never registers individually: states and districts run the ACT as a school-day test, and those sittings move to the Enhanced version in Spring 2026.

Both tests serve US college admissions, and ACT publishes a direct comparison of the two. Five differences drive the choice.

At 2 hours 5 minutes to a reportable Composite, the ACT is the shorter of the two admissions tests. Choose it when you prefer a fixed linear test with no mid-test difficulty change, when you want a reported Science score, or when paper testing suits you. Choose the SAT when adaptive digital testing suits you better.

The reliable way to decide is empirical. Our SAT vs ACT comparison breaks down format, pacing, fees and scoring before you commit to a test. Sit one full-length practice test of each under real timing, on separate days, then compare the two results. Score both, convert them to percentiles, and note where the clock beat you. One timed sitting of each format tells you more than any feature comparison, including this one.

Registration

Fees and test dates change by cycle and by country. Confirm the current price, test date and registration deadline on ACT's registration page before you book. Check as well whether your state or district runs a school-day sitting, since a school-day ACT is arranged through your school rather than through your own registration.

Where to Start

Work in this order:

1. Sit one full-length mock under real timing on our free ACT practice tests. No signup.
2. Convert your raw section results with our ACT score calculator to get a Composite baseline.
3. Compare your three core section scores. The weakest of English, Math and Reading returns the most Composite points per hour of work.
4. Drill the weak area with our targeted question sets, then re-test on a fresh mock.
5. Decide on Science and Writing early, because both change your practice schedule.
6. Put the whole thing on a calendar with our ACT study plan.

Each section has its own deeper guide: English, Math, Reading, Science and Writing. Read the guide for your weakest core section first, because English, Math and Reading are the three sections deciding your Composite. Come back to the Science and Writing guides once you have settled whether you are sitting them at all.

Our full-length ACT mocks and section drills are free on the ACT practice page, with instant scoring and no signup. Start with a full mock under real timing to set a baseline, then drill the section costing you the most Composite points. Re-test on a fresh mock every few weeks and watch both your section scores and your pacing.

Sources

• ACT Test Enhancements for Higher Education
• The Enhanced ACT Test, K-12 educator guide (PDF)
• Understanding Your ACT Scores
• ACT vs. SAT: Which Test Should You Take?
• Description of Writing Test
• ACT Registration