The Medical College Admission Test (MCAT) is the single most important standardized exam in the medical school application. It is a 7.5-hour, computer-based test administered by the Association of American Medical Colleges (AAMC). This guide breaks down exactly what's on it, how it's scored, how long you should study, and how to build a study plan that actually works.
The MCAT is divided into four scored sections. Each tests not just content knowledge but your ability to reason through dense, passage-based problems under time pressure.
This section combines general chemistry, organic chemistry, physics, and biochemistry as they apply to living systems. You'll see 59 questions in 95 minutes. Roughly a quarter of the questions are standalone; the rest are tied to passages describing experiments or scenarios. Strong test-takers treat this as a reasoning section, not a memorization section — the math is light, but interpreting graphs, experimental design, and units is heavily tested.
CARS is the only section with no science content at all. It presents dense passages drawn from the humanities and social sciences, followed by questions that test comprehension, inference, and argument analysis. You get 53 questions in 90 minutes. CARS is notoriously difficult to improve quickly because it measures a skill, not a body of knowledge. The fix is consistent daily practice — one to two passages every single day for months — rather than cramming.
This is the most content-heavy section for most students: biology, biochemistry, and some organic and general chemistry. 59 questions in 95 minutes. Biochemistry alone makes up a huge fraction of the questions, which is why we recommend taking biochemistry as a course before sitting for the exam. Expect questions on amino acids, enzyme kinetics, metabolism, molecular biology, and physiology.
Often the section where students see the biggest score jumps, because it rewards focused memorization. It covers introductory psychology and sociology with some biology. 59 questions in 95 minutes. The widely used "Khan Academy 300-page document" and a dedicated Anki deck are the gold standard here — the terminology is learnable in a way CARS is not.
Each of the four sections is scored on a scale from 118 to 132, with 125 as the midpoint. The four section scores combine into a total score that ranges from 472 to 528, with 500 as the exact midpoint.
| Total Score | Percentile (approx.) | Competitiveness |
|---|---|---|
| 528 | 100th | Perfect |
| 520+ | ~98th | Top-tier MD |
| 511–515 | ~80–90th | Competitive for MD |
| 506–510 | ~67–78th | Solid; many MD/DO |
| 500–505 | ~50–62nd | Competitive for DO |
Take the MCAT only after you've completed the prerequisite coursework it tests — especially biochemistry, psychology, and sociology, which many students don't finish until later. Sitting for the exam before you've learned the content is the most common reason for a disappointing score.
Strategically, you want your score back before you submit your application. Since AMCAS opens in late May and scores take about a month to release, testing in January through May of your application year is ideal. This gives you a buffer to retake if needed.
Most successful test-takers study for three to six months, putting in somewhere between 300 and 500 total hours. The right number depends on your starting point (take a diagnostic to find out), how much content you remember, and how many hours per week you can realistically commit.