Best Free ACT Prep 2026: Official Practice Tests & Guide

TL;DR

The ACT changed significantly in 2025 with fewer questions, more time per question, and Science becoming optional. The best free ACT prep starts with official practice tests from ACT.org, which remain the gold standard for realistic practice. Khan Academy does not offer ACT-specific prep (a common misconception). This guide defines every term, tool type, and resource you’ll encounter so you can build an effective study plan without spending a dollar.

The ACT looks nothing like it did two years ago. The Enhanced ACT, which rolled out nationally in September 2025, cut the test from 215 questions to 131, dropped Science from the composite score, and gave students significantly more time per question. Most “best free ACT prep” lists haven’t caught up. They still reference the old format, link to outdated practice tests, and recommend resources that don’t align with current timing or question counts.

This glossary exists to fix that. Every term below is defined within the context of the Enhanced ACT, so the tools and strategies you learn about actually match the test you’ll take. Before diving in, it helps to understand what “free” really means, because the word covers everything from genuinely no-cost official materials to email-gated trials that auto-charge your card.

If you want a single platform that combines diagnostics, practice exams, a question bank, and an AI tutor, explore Miyagi Labs’ ACT prep to see what’s available at no cost.

Best Free ACT Prep Resources at a Glance

The best free ACT prep strategy is usually a combination of official ACT practice tests for realistic exam practice and free third-party resources for additional drills, explanations, and skill review. No single free platform necessarily provides everything you need.

Which Free ACT Resource Should You Start With?

Start with an official ACT practice test to establish your baseline score and become familiar with the current ACT format. Then use targeted drills, explanations, and skill-building resources to address the areas where you lose points.

Use third-party resources primarily for additional practice after you understand the official test format and have used the highest-quality official questions available.

Which Free ACT Prep Resource Should You Use?

Different free ACT resources solve different problems. The right choice depends on whether you need a realistic practice test, targeted questions, content review, or strategy help.

How Much Does the ACT Cost?

ACT registration fees can change, and optional sections or services may have additional costs. Check the current ACT registration page for the latest test fee, optional Science fee, late-registration charges, and available fee waivers.

For a free-prep strategy, separate test registration costs from prep costs. You can prepare using free resources even though registering for the official exam itself may require a fee.

ACT Format and Scoring Terms

These are the foundational concepts you need to understand before choosing any prep resource.

ACT (American College Testing)

A standardized college admissions test administered by ACT, Inc. About 1.4 million US students took it in 2024, representing roughly 36% of the graduating class. The core test costs $68. Adding the optional Science section is just $4 more. Nearly all four-year colleges in the United States accept ACT scores.

If you’re still deciding between the ACT and SAT, the two tests have different structures and strategies. Some students find the comparison helpful before committing prep time to one exam. You can compare SAT prep options to see how the tests differ.

Enhanced ACT

The current version of the test, debuting digitally in April 2025 and rolling out in both paper and digital formats by September 2025. This is not a minor update. Here’s what changed:

• English: 50 questions in 35 minutes (down from 75 questions in 45 minutes)

• Math: 45 questions in 50 minutes (down from 60 questions in 60 minutes)

• Reading: 36 questions in 40 minutes (down from 40 questions in 35 minutes)

• Science: Now optional, no longer part of the composite score

• Total core test time: About 2 hours (125 minutes), down from 2 hours 55 minutes

Students get 18-27% more time per question across all sections. The 1-36 scoring scale stays the same.

Current ACT Format

The current ACT uses a shorter core test structure than the pre-2025 ACT. English, Math, and Reading make up the core composite, while Science is optional.

Because ACT policies and testing options can change, students should verify the current format, fees, and available options on ACT's official website before test day.

Prep implication: When practicing pacing, use materials designed for the current ACT format rather than automatically applying timing from older ACT practice tests.

Why this matters for prep: if you’re using a practice test built before 2025, the question counts are wrong. A legacy English section has 75 questions; the current one has 50. Practicing with the wrong format will wreck your internal pacing clock.

2026 ACT vs. Pre-2025 ACT

The biggest preparation mistake is using an older ACT practice test as though its timing and structure are identical to the current test.

Bottom line: Older ACT materials can still provide useful questions and content review, but current-format materials should be your first choice for full-length simulations and pacing practice.

Composite Score

Your overall ACT score, reported on a 1-36 scale. Under the Enhanced ACT, the composite is the average of three section scores: English, Math, and Reading. Science is no longer included. This is a critical change that many prep resources haven’t updated for.

The average composite score is currently 19.4. A 22 puts you in the 72nd percentile. A 28 reaches the 91st percentile. A 31 hits the 96th. Small point gains can produce outsized percentile jumps, which is why targeted prep matters so much.

Section Scores

Individual 1-36 scores for English, Math, and Reading (and Science, if you take the optional section). Colleges see these alongside your composite. Weak section scores can flag gaps even if your composite looks strong.

Superscore

Your best section scores pulled from multiple ACT test dates and combined into a new, higher composite. Most top schools now accept superscores, including Harvard, Yale, Duke, UChicago, MIT, USC, and Stanford.

This makes retaking the ACT a legitimate strategy. According to ACT, Inc., students who took the test multiple times scored an average of nearly 3 points higher than those who tested only once. Superscoring means you don’t need to peak on every section in a single sitting.

STEM Score

The average of your Math and Science section scores, reported separately on your score report. Some STEM-focused programs and scholarships look at this number specifically.

Benchmark Scores

ACT’s college-readiness thresholds, set for each section. Meeting a benchmark means you have a roughly 50% chance of earning a B or higher in the corresponding college course. The benchmarks are: English 18, Math 22, Reading 22, Science 23 (if taken).

Percentile / National Rank

Where your score falls relative to all other test-takers. A percentile of 72 means you scored higher than 72% of students. For the 2025-2026 testing year, a composite of 22 is 72nd percentile, 28 is 91st, and 31 is 96th.

Prep Tool Types

Every free ACT prep platform uses some combination of these tools. Understanding what each one does helps you evaluate whether a resource is actually useful or just marketing.

Full-Length Practice Test

A timed test covering all sections with the correct number of questions per section. This is the single most important prep tool. It builds stamina, teaches pacing, and gives you a realistic score estimate.

The distinction between official and third-party practice tests matters enormously. Official tests from ACT.org contain real questions written by the test maker. A student who scored a perfect 36 shared on Reddit that after trying Kaplan, Princeton Review, and other prep books, he realized “their questions are low-quality and unauthentic” and concluded you “have to stick to the real deal: real ACT practice tests.” PrepScholar echoes this, stating that the official prep book “is definitely the best resource for realistic ACT practice questions” and advising students not to bother with unofficial tests because “their quality is far inferior.”

That said, official tests are limited in number. The Official ACT Prep Guide 2025-2026 contains four new practice tests designed for the Enhanced format, and ACT offers one digital practice test on their website. Once you exhaust those, third-party tests become necessary, just know the quality tradeoffs.

Try a free, timed ACT practice exam that mirrors the Enhanced ACT format.

Diagnostic Test

A shorter assessment designed to identify your strengths and weaknesses before you build a study plan. A good diagnostic tells you not just your overall level but which specific skills need work. English grammar rules versus reading comprehension, for example, or algebra versus geometry.

The community consensus on Reddit’s r/ACT is clear: take a baseline diagnostic first, identify your weak sections, drill those sections, then retest. Skipping the diagnostic means you waste time practicing things you already know.

Question Bank

A large collection of practice questions you can filter by section, topic, and difficulty level. Question banks let you do targeted practice on specific weaknesses rather than grinding through full tests every time.

For ACT-specific question banks, look for ones that align with the Enhanced ACT format and provide answer explanations. Browse the ACT question bank on Miyagi Labs for filterable practice by section and skill.

Score Predictor

A tool that estimates your ACT score based on practice performance. Good predictors use statistical models calibrated against real score distributions. They’re useful for setting a target score and tracking whether your prep is working.

The ACT score predictor on Miyagi Labs gives you a data-backed estimate of where you’d land on test day.

AI Tutor

An on-demand tool that provides explanations, hints, and guided practice powered by artificial intelligence. AI tutors are available 24/7, which makes them useful for late-night study sessions when no human tutor is around. The quality varies widely. Practitioners on Reddit’s r/ACT have expressed skepticism about AI-generated ACT questions, with one user describing them as not “very accurate.” The best AI tutors explain official or expert-reviewed questions rather than generating their own.

Study Plan / Personalized Path

A structured schedule built around your diagnostic results. Instead of randomly working through practice books, a study plan tells you exactly what to study each day and for how long. Some platforms generate these automatically after you take a diagnostic.

Flashcards

Spaced-repetition cards for grammar rules, math formulas, and vocabulary. Flashcards work best for memorization-heavy content like the 18 grammar rules tested on ACT English or the math formulas you need to know cold. Varsity Tutors and Quizlet both offer free ACT flashcard sets.

Answer Explanations

Step-by-step walkthroughs of why each answer choice is correct or incorrect. This is where real learning happens. Getting a question wrong doesn’t help you unless you understand why. The best free resources include detailed explanations for every question, not just the correct answer.

Section-Specific Drills

Targeted practice sets focused on one section or skill. If your diagnostic shows that Reading is dragging down your composite, section-specific drills let you isolate and attack that weakness. Some practitioners on r/ACT recommend “spamming problem sets” in your weakest section as the most efficient improvement strategy.

For targeted drilling, Miyagi Labs offers ACT problem sets organized by section and skill level.

CBT (Computer-Based Testing)

Taking the ACT on a computer rather than on paper. The Enhanced ACT is now available in both formats. If your test center offers digital testing, practicing on a screen (rather than with a printed booklet) helps you adjust to the reading experience and navigation tools.

How to Choose the Best Free ACT Prep Resource

Before signing up for an ACT prep platform, check six things:

1. Current ACT Alignment

The resource should reflect the current ACT structure, section timing, question counts, and scoring system.

2. Question Quality

Look for official ACT questions first. If you use third-party questions, choose resources that clearly explain their methodology and provide detailed answer explanations.

3. Full-Length Practice Tests

A useful prep platform should give you a way to practice the complete exam under timed conditions.

4. Diagnostic Testing

A diagnostic should identify which sections and skills need the most work instead of giving you only an overall score.

5. Answer Explanations

Every missed question should become a learning opportunity. Detailed explanations are more useful than simply showing the correct answer.

6. Progress Tracking

Look for tools that allow you to compare practice results over time and identify recurring mistakes.

Simple rule: Choose the resource that helps you identify a weakness, practice that weakness, understand your mistakes, and measure whether you improved.

Free Resource Categories

Not all free ACT prep is created equal. Here’s how to categorize what’s out there.

Official Free ACT Prep Resources

ACT.org is the starting point. The test maker offers:

• Full-length practice tests with real ACT questions

• Free sample questions in every subject

• A daily question delivered through a free MyACT account, with explanations and tips

• Free prep classes taught by Kaplan instructors through an official partnership (no purchase required)

• Study guides and test-taking tips

Official practice tests are the gold standard because they use real questions calibrated to actual difficulty levels. Every serious prep plan should start here.

What You Can Get Directly From ACT

The official ACT website should be your first stop when you want practice that reflects the test maker's own materials.

Look for:

• Current-format practice tests

• Official sample questions

• Practice question explanations

• Test-day information

• Scoring information

• Registration and testing information

• Official preparation guidance

Best use: Use official materials for your baseline test, realistic pacing practice, and final full-length simulations.

Important: Check ACT's current preparation pages before relying on an older practice test or guide. ACT has changed its format, testing options, and preparation materials over time.

Freemium Platforms

These tools offer a genuinely useful free tier plus paid upgrades for advanced features. Examples:

• Magoosh: Free ACT practice questions with video explanations and PDFs for seven full-length ACT practice tests with detailed answer keys

• Varsity Tutors: Free practice tests, flashcards, and personalized learning paths

• Mometrix: Free ACT practice test covering English, Math, Reading, and Science with scoring

• Test Ninjas: Claims over 50 hours of free content including practice tests, daily problem sets, and study guides

Miyagi Labs also falls in this category, offering free practice exams, a diagnostic, and AI tutor access as part of its free tier, with paid subscriptions unlocking the full platform.

Free Trials

Time-limited full access that auto-converts to a paid subscription. Kaplan offers a free half-length ACT practice test and sample class. Princeton Review provides a free full-length practice test with an interactive score report. Both require email sign-up and serve as lead generation for paid products.

The important thing: read the terms. Some free trials require a credit card and will charge you automatically if you don’t cancel. Others just want your email.

Open Educational Resources

These are free platforms not specifically designed for the ACT but useful for building foundational skills.

Khan Academy is the biggest source of confusion here. Khan Academy does not offer any ACT-specific practice tests, courses, or prep materials. Their test prep partnership is exclusively with College Board for the SAT. A 10-year ACT tutor calls this “one of the most common points of confusion,” noting that Khan Academy is such a trusted name that students assume it covers everything. Students searching for “Khan Academy ACT prep” often spend time clicking around the site wondering if they’re missing something. They’re not.

That said, Khan Academy is excellent for general skill-building. If you’re weak in algebra, geometry, or basic statistics, its math courses are genuinely helpful. Just don’t expect ACT-formatted practice. For a deeper look at how general platforms compare to ACT-specific tools, see this Miyagi Labs vs Khan Academy comparison.

Community Resources

Google ranks Reddit, Facebook groups, and Quora threads for this query, and for good reason. Communities like r/ACT on Reddit provide unfiltered advice from students who recently took the test. The dominant advice across these threads: use official ACT materials before anything else, take a diagnostic early, and don’t waste time on low-quality practice questions.

YouTube also has valuable free content. Strategy channels walk through specific question types, timing approaches, and section-by-section breakdowns.

What Does Free ACT Prep Actually Include?

“Free ACT prep” can mean several different things. Some resources provide completely free questions and explanations, while others provide free tests or lessons but reserve advanced features for paying subscribers.

Before starting, check whether a resource requires an account, limits the number of questions, or automatically converts a trial into a paid subscription.

Strategy Terms

Knowing the tools isn’t enough. These strategy concepts determine whether your free ACT prep actually produces results.

Baseline Score

Your starting score before any prep. Establish this by taking a full-length official practice test under timed conditions. Don’t study beforehand, and don’t look up answers mid-test. Your baseline tells you how far you need to go and which sections need the most work.

Target Score

Your target ACT score depends on the colleges, programs, scholarships, and personal goals you are considering.

Start by checking the current admissions information for each college on your list. Look at the ACT score information the institution publishes, then decide whether you want to target the middle of its reported range, the upper end, or another score based on your application strategy.

Do not treat a published score range as an admissions guarantee. ACT scores are only one part of an application.

Score Improvement / Point Gain

The difference between your baseline and your final score. For most students, studying at least 10 hours per week for 3 months can produce around a 4-point composite gain. Studying 20 hours per week over the same period can boost scores by 9 or more points. These benchmarks come from tutor and community sources and assume focused, strategic practice rather than passive reading.

To see what focused prep can produce, check out ACT prep results from students who tracked their improvement.

Pacing

Time management strategy per question and per section. The Enhanced ACT gives you more time per question than the old format, but pacing still matters. English gives you 42 seconds per question. Math gives you 67 seconds. Reading gives you 67 seconds. Knowing these numbers and practicing under real time constraints prevents the “running out of time” panic that kills scores.

A critical warning: do not use pre-2025 practice exams for timing drills. They have the wrong question counts (75 English vs. the new 50), which will ruin your pacing instincts.

Error Log

A record of every question you get wrong, categorized by question type, section, and the specific mistake you made. Error logs reveal patterns. Maybe you keep missing comma-splice questions on English, or you consistently botch probability problems on Math. Without tracking errors, you’re just guessing at what to study.

Timed Practice

Drilling under real exam time constraints. Untimed practice builds knowledge. Timed practice builds the ability to apply that knowledge under pressure. Both matter, but most students underweight timed work. Once you’ve learned a concept, always practice it timed.

Content Review vs. Test Strategy

Two distinct skills that both affect your score. Content review means learning the actual material: grammar rules, math concepts, reading comprehension techniques. Test strategy means knowing how to take the test: process of elimination, time allocation, when to guess and move on.

The ACT is a fixed-format test with no penalty for guessing. Every student sees the same questions, and your score is based entirely on how many you answer correctly. This means you should never leave a question blank. Even a random guess has a 25% chance of being right.

What “Free” Really Means: A Transparency Guide

The best free ACT prep resources span a spectrum. Here’s how to tell what you’re actually getting.

Truly Free

No sign-up, no email, no credit card. You access the content and use it.

• ACT.org sample questions and study guides

• Khan Academy general math and reading courses (not ACT-specific)

• Some Magoosh PDFs and video explanations

• Reddit and YouTube community content

Gated Free

Free content, but you need to create an account or provide an email address. The content itself costs nothing.

• MyACT account (daily question, practice tests)

• Kaplan free ACT prep class (email required)

• Princeton Review free practice test (sign-up required)

Free Trial

Full access for a limited time. Converts to a paid subscription if you don’t cancel. Read the terms carefully.

• Many app-based platforms offer trials ranging from 3 to 14 days

• Some require a credit card upfront; others don’t

Freemium

Core features are permanently free. Advanced features require payment. This is the most common model for modern ACT prep platforms. Miyagi Labs, for example, offers free practice exams and diagnostics, with paid subscriptions unlocking the full suite of features including personalized study plans and unlimited AI tutor access.

How Many ACT Practice Tests Should You Take?

You do not need to take a full-length ACT every day. Full tests are most useful when they have a specific purpose: establishing a baseline, measuring progress, practicing pacing, or simulating test day.

A practical free-prep schedule is:

Between full tests, spend most of your study time reviewing mistakes and practicing the skills responsible for missed questions.

Key principle: A practice test is valuable only if you spend time analyzing the results afterward.

Building Your Free ACT Prep Plan

Here’s how to put all of this together into a concrete study approach that costs nothing.

Week 1: Take an official full-length practice test from ACT.org as your diagnostic. Score it. Record your composite and section scores. This is your baseline.

Weeks 2-4: Identify your two weakest sections. Use section-specific drills and ACT practice questions to target those areas. Keep an error log. Review answer explanations for every question you miss.

Weeks 5-8: Take a second full-length practice test. Compare to your baseline. If a section hasn’t improved, adjust your approach (more time on content review or more timed drilling, depending on the gap). Start doing full timed sections to build pacing habits.

Weeks 9-12: Take your remaining official practice tests. Simulate real test conditions: timed, no phone, no breaks between sections. Review errors. Refine pacing.

Test day and beyond: Remember that retaking is a proven strategy. ACT data shows students who test multiple times average nearly 3 points higher. Superscoring means each attempt can only help.

For a complete, guided version of this approach with built-in diagnostics and adaptive practice, start free ACT prep on Miyagi Labs.

Frequently Asked Questions

What is the best free ACT prep resource?

Official practice tests from ACT.org are the single best free resource. They contain real questions written by the test maker, calibrated to actual difficulty levels. Students who scored 36 and experienced tutors consistently recommend exhausting official materials before turning to any third-party source.

Does Khan Academy offer free ACT prep?

No. Khan Academy’s test prep partnership is exclusively with College Board for the SAT. There are no ACT-specific practice tests, courses, or materials on Khan Academy. It is useful for building general math and reading skills, but it won’t prepare you for ACT-specific question formats or timing.

How many hours of studying does it take to improve my ACT score?

Studying at least 10 hours per week for 3 months typically produces around a 4-point composite gain. Studying 20 hours per week over the same period can boost scores by 9 or more points. The key is focused, strategic practice targeting your weakest areas, not passive review.

Are pre-2025 ACT practice tests still useful?

For content review and question familiarity, older tests still have value. For timing and pacing practice, they’re potentially harmful. The old English section had 75 questions in 45 minutes; the current one has 50 in 35 minutes. Practicing with the wrong format builds incorrect pacing habits. Use the Official ACT Prep Guide 2025-2026 for timing drills.

What is ACT superscoring, and should I retake the test?

Superscoring takes your highest section scores across multiple test dates and combines them into a new, higher composite. Most selective colleges accept superscores. ACT data shows students who test multiple times score an average of nearly 3 points higher. Retaking is almost always worth it if you have time.

What’s the difference between official and third-party practice tests?

Official tests from ACT.org use real questions from past exams. Third-party tests from companies like Kaplan, Princeton Review, and Magoosh are written by outside authors and may not match the exact difficulty, style, or format of real ACT questions. Use official tests for score estimation and pacing practice. Use third-party tests for additional volume when you’ve exhausted official materials.

Is the ACT Science section still required?

No. Under the Enhanced ACT (2025-2026), Science is optional and no longer factors into your composite score. The core test covers English, Math, and Reading. Taking the optional Science section costs an additional $4 and produces a separate Science score and STEM score, which some programs may want to see.

How much does the ACT cost?

The core ACT (English, Math, Reading) costs $68. Adding the optional Science section brings the total to $72. Fee waivers are available for eligible students through school counselors.