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Malke Asaad July 13, 2023
MCAT Blog
What Is the MCAT?
What It Tests, How Long It Is, and What to Expect
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The Medical College Admission Test (MCAT) is one of the most important — and most challenging — steps on the road to medical school. Nearly every U.S. and Canadian medical school requires it, and your MCAT score plays a major role in determining where you get accepted.
But before you begin studying, you need to understand what the MCAT actually is, what it tests, and how long you’ll be sitting for it. This guide breaks everything down clearly so you know exactly what to expect before test day.
If you’re committed to raising your MCAT score, you shouldn’t study alone. Work with a tutor who provides structure, feedback, and a personalized study plan, and start with a free session.
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Table of Contents
- What Is the MCAT?
- Why Do Medical Schools Require the MCAT?
- How Important Is the MCAT for Medical School Admissions?
- What Does the MCAT Test? (Section Breakdown)
1. Chemical and Physical Foundations of Biological Systems (C/P)
2. Critical Analysis and Reasoning Skills (CARS)
3. Biological and Biochemical Foundations of Living Systems (B/B)
4. Psychological, Social, and Biological Foundations of Behavior (P/S) - How Long Is the MCAT?
○ Total MCAT Testing Time - What Is the MCAT Testing Experience Like?
- How Many Questions Are on the MCAT?
- What Skills Does the MCAT Really Test?
- FAQs
- Summary
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What Is the MCAT?
The MCAT (Medical College Admission Test) is a standardized, computer-based exam created by the AAMC (Association of American Medical Colleges). It’s designed to assess whether you have the scientific knowledge, critical thinking skills, and reasoning ability required to succeed in medical school.
Think of the MCAT as a two-part challenge:
- Content Knowledge — Your understanding of biology, chemistry, physics, psychology, sociology, and biochemistry.
- Critical Reasoning and Analysis — Your ability to interpret data, evaluate arguments, and reason through complex passages.
Medical schools rely heavily on the MCAT because it predicts future success in challenging medical coursework.
Why Do Medical Schools Require the MCAT?
Medical schools receive thousands of applications each year from students with diverse academic backgrounds, grading systems, and undergraduate institutions. The MCAT exists to create a standardized way to compare applicants across those differences.
At its core, the MCAT helps schools answer two key questions:
- Can this student handle the academic rigor of medical school?
- Can this student reason through complex scientific and human problems under pressure?
Decades of data show that MCAT performance correlates with success in the preclinical medical school curriculum and on licensing exams. While it’s far from a perfect measure, it provides admissions committees with a common benchmark when evaluating large applicant pools.
For students who feel frustrated by the exam, it’s important to understand that the MCAT isn’t designed to be “busywork.” It plays a central role in how schools assess readiness for medical training.
How Important Is the MCAT for Medical School Admissions?
The MCAT is one of the most heavily weighted components of a medical school application. While schools review applicants holistically, MCAT scores often function as an initial screening tool.
Some medical schools have:
- Official minimum MCAT score requirements
- Unpublished score thresholds that influence which applications receive full review
- Automated or semi-automated filters used during early stages of application review
This means that even strong applicants with excellent GPAs, extracurriculars, and personal statements may struggle to receive interviews if their MCAT score falls below a school’s typical range.
Because of this, the MCAT doesn’t just affect whether you get accepted — it strongly influences where you’re competitive. Higher scores open more doors, increase interview opportunities, and give applicants more flexibility in school selection.
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What Does the MCAT Test? (Section Breakdown)
The MCAT has four major sections, each designed to test a different set of academic and reasoning skills.
If you want to know the best MCAT resources we personally recommend based on our tutoring experience, check out our guide here.
1. Chemical and Physical Foundations of Biological Systems (C/P)
Duration: 95 minutes
Questions: 59 (44 passage-based; 15 discrete)
What It Tests:
- General chemistry
- Organic chemistry
- Introductory physics
- Biochemistry
- Foundations of biological processes
- Scientific reasoning, research methods, and data analysis
What this section is like:
You’ll see passages describing biological or physical systems, experiments, and data, along with questions requiring calculations, reasoning, and concept application. No calculator is allowed, so mental math is essential.
2. Critical Analysis and Reasoning Skills (CARS)
Duration: 90 minutes
Questions: 53 (all passage-based)
What It Tests:
- Reading comprehension
- Argument analysis
- Inference and reasoning
- Understanding tone, bias, and structure
- Ability to apply ideas beyond the passage
What this section is like:
Think of CARS as MCAT-style reading comprehension: complex, dense humanities and social science passages that require careful reading under time pressure. There is no memorization involved, making this section uniquely challenging.
3. Biological and Biochemical Foundations of Living Systems (B/B)
Duration: 95 minutes
Questions: 59 (44 passage-based; 15 discrete)
What It Tests:
- Introductory biology
- Biochemistry
- Organic and inorganic chemistry
- Cellular processes
- Genetics, evolution, physiology
- Data interpretation and scientific inquiry
What this section is like:
You’ll read experimental passages involving biological systems, lab data, and biochemical pathways, then answer applied reasoning questions.
4. Psychological, Social, and Biological Foundations of Behavior (P/S)
Duration: 95 minutes
Questions: 59 (44 passage-based; 15 discrete)
What It Tests:
- Introductory psychology
- Introductory sociology
- Behavioral and sociocultural determinants of health
- Mental processes
- Social structures
- Health disparities and demographics
What this section is like:
This section blends psychology, sociology, and biology to evaluate your understanding of behavior, perception, and social influences on health.
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How Long Is the MCAT?
The MCAT is famously long. In fact, it’s often the longest exam most students will ever take before medical school.
Here’s the full timing breakdown:
| Section / Activity | Time |
| Test-day certification | ~4 minutes |
| Tutorial (optional) | 10 minutes |
| C/P | 95 minutes |
| Break (optional) | 10 minutes |
| CARS | 90 minutes |
| Mid-exam break (optional) | 30 minutes |
| B/B | 95 minutes |
| Break (optional) | 10 minutes |
| P/S | 95 minutes |
| Void question* | 5 minutes |
| Survey (optional) | 5 minutes |
Total MCAT Testing Time:
6 hours 15 minutes (content only)
~7 hours 30 minutes (including breaks)
Total day length (including arrival + check-in)?
Realistically: 9–10 hours from the time you leave home to when you finish.
*At the end of the exam, you’ll have the option to void your MCAT score. Voiding means your score will not be reported to medical schools and you will not see it. This decision is final and is typically only used if something significantly interfered with your test performance.
If you want to know the best time to take the MCAT, check out our guide here.
What Is the MCAT Testing Experience Like?
The MCAT is a proctored, in-person exam administered at official Pearson VUE testing centers. Test day follows strict security and timing protocols to ensure standardization across all examinees.
You can expect:
- Identity verification and check-in procedures
- Secure storage for personal items (phones, watches, notes, food)
- Computer-based testing in a controlled environment
- Scheduled, timed breaks between sections
- On-screen tools (highlighting, strikethrough, notes) but no calculators
Because of these conditions—and the exam’s length—many students find that familiarity with the testing environment is almost as important as content mastery. This is why full-length practice exams taken under realistic conditions are such a critical part of MCAT preparation.
How Many Questions Are on the MCAT?
Total MCAT Questions: 230
Breakdown by section:
- C/P: 59
- CARS: 53
- B/B: 59
- P/S: 59
Most questions are passage-based, meaning you’ll read a scientific or humanities passage and answer questions about it.
Retaking the MCAT in 2026? Our strategy guide shows you how to boost your score the second time around. Check it out here.
What Skills Does the MCAT Really Test?
Beyond content, the MCAT evaluates:
- Scientific reasoning
- Critical reading
- Data interpretation
- Understanding experimental design
- Mental stamina and endurance
Each MCAT section is scored on a scale from 118 to 132, for a total possible score of 472 to 528. Medical schools typically focus on both your overall score and your section scores, since they reflect different skill sets. While scoring details can get complex, this scale gives you a basic framework for understanding how performance is evaluated.
For a deeper breakdown of how MCAT scores are calculated, scaled, and interpreted by medical schools, see our full guide to MCAT scoring.
Frequently Asked Questions About the MCAT (FAQ)
1. What does the MCAT stand for?
MCAT stands for Medical College Admission Test.
2. Do all medical schools require the MCAT?
Nearly all MD and DO programs in the U.S. and Canada require it.
If you’re deciding between MD and DO programs, be sure to check out our blog comparing MD vs. DO pathways to help you understand the differences.
3. How long is the MCAT?
Approximately 7 hours and 30 minutes, including breaks.
4. How much does the MCAT cost?
Around $330 for U.S. and Canadian test-takers (fees vary by year and location).
5. What is a good MCAT score?
A score of 510+ is generally competitive; 515+ is strong for most MD programs.
If you’re committed to raising your MCAT score, you shouldn’t study alone. Work with a tutor who provides structure, feedback, and a personalized study plan, and start with a free session.
6. How many times can I take the MCAT?
- 3 times per year
- 4 times in two years
- 7 times total in a lifetime
7. Do I need to know every topic in extreme depth?
No — the MCAT focuses more on application and reasoning than pure memorization.
8. Is the CARS section the hardest?
Many students find CARS the most challenging due to its emphasis on dense passages and reasoning.
For a deeper breakdown, check out our CARS blog for more clarification.
9. Can I eat or drink during the MCAT?
Yes, but only during breaks. Food and drinks stay in your locker.
10. When should I start studying for the MCAT?
Most students study for 3–6 months, depending on coursework background and schedule.
If you want to know the best time to take the MCAT, check out our guide here.
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Summary
The MCAT is one of the most rigorous and important steps in the medical school admissions process. It’s designed to test both your scientific knowledge and your ability to think critically under pressure. The exam covers four major sections spanning biology, chemistry, physics, psychology, sociology, and reasoning skills.
It is also a long test—7 hours and 30 minutes including breaks—which means building mental stamina is just as important as mastering the content.
Understanding what the MCAT is, what it tests, and how it’s structured will help you prepare effectively, pace yourself, and go into test day with confidence.
Struggling to organize your MCAT studying?
Book a free consultation with an expert tutor and walk away with a personalized, structured study plan built around your goals.
Good luck!
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