What ACT Vault is — and isn't.

The short version

ACT Vault publishes original ACT-style practice questions across English, Math, Reading, and Science, plus full-length practice tests and section study guides. Every question has a worked answer explanation. Every page is free to read. The site runs on advertising, not subscriptions.

How the content is built

Questions are written and edited to mirror the format, style, and difficulty distribution of the real ACT. We do not reproduce official ACT questions — those belong to ACT, Inc., and reproducing them would be both illegal and unhelpful (you can already buy the official prep guide for that). Where the real ACT uses a 75-question, 45-minute English passage with embedded grammar and rhetoric edits, our drills mirror that structure. Where the Science section uses three formats (Data Representation, Research Summaries, Conflicting Viewpoints), our Science drills do too.

Difficulty calibration is done in three tiers — easy, medium, hard — anchored against publicly released ACT score-conversion tables. An "easy" question is one that a student scoring around 24 composite would consistently get right; a "hard" question is one that a student scoring around 30 would still occasionally miss.

Who builds this

ACT Vault is built and maintained by an independent team of former tutors who got tired of recommending expensive resources to students who couldn't afford them. We are not affiliated with ACT, Inc. or any test-prep publisher.

Reporting errors

If you spot a wrong answer, a typo, or a question that feels off, please email us. We rewrite questions on a continuous basis based on reader reports.

Why it's free

The ACT is a gatekeeper to college admissions and scholarship money. Charging students for the privilege of practicing for it strikes us as backwards. Ads on this site pay for hosting and editorial work; if you'd rather not see them, the standard browser ad-blocker will work just fine — we do not paywall around it.