MCAT prep guide · updated October 2026
MCAT prep with free full-length practice tests
Good MCAT prep is more than content review. The exam is 6 h 15 min of testing time, and stamina, pacing and passage reading only improve when you practise them. Full-length practice tests are where that happens. Here is how to fit them into a study plan, and how to get the most out of a free one.
Where full-lengths fit in an MCAT study plan
- 1. DiagnosticOne timed full-length before you study, to see where you start.
- 2. Content reviewLearn the content, with timed practice questions every week so reading and pacing improve too.
- 3. Full-length phaseFull-length practice exams on a regular schedule, each one reviewed in depth.
- 4. Final weeksOfficial AAMC practice exams, test-day rehearsal and light review of your error log.
Start with a diagnostic test
Take one full-length before you open a content book. Sit it timed and without looking anything up - a low score here is useful, because it tells you where the first weeks of study should go. Compare your four section scores, then sort every missed question into content you never learned, content you forgot, and questions you lost to reading or timing.
The 528 Lab full-length is free and needs no account, so it works as a first diagnostic.
During content review: timed practice questions
Reading notes feels productive, but the MCAT tests applying content to passages you have never seen. Keep a weekly block of timed, passage-based practice questions alongside content review, and do CARS practice from the start: it has no content to review, so it only improves with practice.
Each 528 Lab section can be taken on its own, so a single section (C/P 95 min, CARS 90 min, B/B 95 min, P/S 95 min) makes a timed set in the middle of a study week.
The full-length phase
- Once most content is covered, move to full-length practice exams on a regular schedule rather than cramming them into the last weeks.
- Rehearse test day: the same start time, all four sections in order, timed breaks, no phone.
- Leave at least a full day to review each exam before taking the next one. A full-length you don't review is mostly stamina practice.
- Watch the trend across several exams, not a single score.
How to review a full-length practice exam
- Go through every question, including the ones you got right by guessing.
- For each miss, read why the right answer is right and why your choice was wrong.
- Log it: topic, question type, and the reason you missed it.
- Turn the log into next week's study list - content gaps go back to review, reading and timing errors go to more timed practice.
Free practice tests and official AAMC exams
The AAMC sells official practice exams written by the test maker, and many students save them for the final weeks of prep. Free and third-party full-lengths are useful before that: for a diagnostic, for building stamina, and for more passages to practise on. Treat any non-AAMC score as an estimate - ours is shown as a range for that reason.
Take the free MCAT practice test
A full-length MCAT practice exam: four sections on the real timing, explanations for every question, and a score estimate with its range.
Start the full-length →528 Lab is not affiliated with or endorsed by the AAMC. MCAT is a registered trademark of the AAMC.