The MCAT, or Medical College Admission Test, is a standardized exam required by all U.S. medical schools and most Canadian medical schools as part of the admissions process. It tests your problem-solving ability, critical thinking, and knowledge of science concepts considered essential preparation for studying medicine. The current version of the exam launched in 2015 and is administered by the Association of American Medical Colleges (AAMC).
What the MCAT Tests
The exam has four sections, each designed to evaluate a different skill set or knowledge base:
- Chemical and Physical Foundations of Biological Systems: Covers general chemistry, organic chemistry, physics, and biochemistry, all framed around biological and medical scenarios. 59 questions, 95 minutes.
- Critical Analysis and Reasoning Skills (CARS): A reading comprehension section with passages drawn from the humanities and social sciences. Unlike the other sections, CARS requires no outside knowledge. Everything you need is in the passages themselves. 53 questions, 90 minutes.
- Biological and Biochemical Foundations of Living Systems: Focuses on biology and biochemistry, testing your understanding of how living organisms function at the molecular and cellular level. 59 questions, 95 minutes.
- Psychological, Social, and Biological Foundations of Behavior: Draws from psychology, sociology, and biology to assess your understanding of how behavioral and social factors affect health. 59 questions, 95 minutes.
Most questions are passage-based, meaning you’ll read a short excerpt (often describing a research study or clinical scenario) and then answer four to seven questions about it. Each science section also includes 15 standalone questions that aren’t tied to a passage. The CARS section is entirely passage-based.
How Long the Exam Takes
The MCAT is one of the longest standardized tests you’ll encounter. The four sections add up to 6 hours and 15 minutes of actual testing time, but total seat time is about 7 hours and 27 minutes once you factor in breaks, a tutorial, and administrative steps. You get a 10-minute break after each section, except after the CARS section, which is followed by a 30-minute lunch break. You’ll also need to arrive at your testing center at least 30 minutes early.
How Scoring Works
Each of the four sections is scored on a scale from 118 to 132, with 125 as the midpoint. Your total score combines all four sections, giving you a range of 472 to 528, with 500 as the midpoint. A score of 500 means you performed right around average compared to other test-takers.
For context, the average MCAT score among students who actually enrolled in U.S. MD-granting medical schools during the 2023-2024 cycle was 511.7. That’s roughly 12 points above the midpoint, which places successful applicants well above the typical test-taker. Competitive scores vary by school, but most admitted students fall somewhere in the 510 to 520 range for MD programs. Osteopathic (DO) programs generally accept somewhat lower scores.
When and Where You Can Take It
The MCAT is offered multiple times per year from January and March through September at hundreds of testing centers across the United States, Canada, and internationally. Most pre-med students take the exam in the spring or summer before the application cycle they’re targeting. If you’re applying to start medical school in the fall, you’d typically take the MCAT roughly 12 to 18 months beforehand to leave time for score release and application preparation.
What It Costs
Standard registration is $355. If you qualify for the AAMC’s Fee Assistance Program, the cost drops to $145. The fee assistance program is designed for applicants with significant financial limitations and also includes free access to official MCAT prep materials and reduced fees for medical school applications through AMCAS, the centralized application service most MD programs use.
How Medical Schools Use Your Score
Your MCAT score is one of the most heavily weighted components of a medical school application, alongside your GPA. Admissions committees use it as a standardized measure to compare applicants from different undergraduate institutions and academic backgrounds. A strong score signals that you have the foundational knowledge and reasoning ability to handle the rigors of medical school coursework.
That said, the MCAT is just one piece of the picture. Schools also evaluate clinical experience, research, personal statements, letters of recommendation, and interviews. A high score won’t guarantee admission on its own, and a lower score doesn’t automatically disqualify you, especially if the rest of your application is strong. But because the exam is standardized and universal, it carries significant weight in the initial screening process.
How Students Typically Prepare
Most students spend three to six months studying for the MCAT, often treating it like a part-time or full-time commitment during the months leading up to their test date. The breadth of content is the biggest challenge: you’re expected to recall material from courses you may have taken years earlier, spanning biology, chemistry, organic chemistry, physics, biochemistry, psychology, and sociology.
Preparation usually involves a combination of content review (relearning the underlying science), practice passages (building the skill of extracting answers from dense text), and full-length practice exams (building stamina for a 7-plus-hour test day). The AAMC publishes its own official practice materials, which are widely considered the most representative of the actual exam. Many students also use third-party prep courses or study guides, though these vary in quality and cost.
The CARS section often requires a different preparation strategy from the science sections. Because it doesn’t test specific knowledge, you can’t simply memorize your way through it. Improvement comes from sustained practice with dense, unfamiliar passages and developing the habit of reading for argument structure rather than surface details.