MCAT Score Calculator: Raw Sections to Composite Score

How the MCAT Scoring System Works

The MCAT has four sections, each scaled independently from 118 to 132. You receive one scaled score per section, and your composite is the sum of all four. The composite scale runs from 472 (four sections all at 118) to 528 (four sections all at 132). A 472 is not a zero, and a 528 is not simply 100%: the scale is anchored to performance data from a large reference group of test-takers, and each score point represents a specific level of ability relative to that group.

Converting your raw correct count to a scaled score involves a process called statistical equating. The AAMC designs multiple versions of the MCAT with different questions, but ensures that a 127 on one form reflects the same knowledge and reasoning ability as a 127 on any other. Because some forms are slightly harder or easier, the equating adjustment is different for every test date. The AAMC does not publish these raw-to-scaled tables, so this calculator uses a linear approximation (the same limitation applies to our SAT score calculator). Official scaled scores appear on your AAMC results report roughly 30 to 35 days after your test date.

The percentile rank shows what share of all test-takers in the reference sample you scored at or above. A 511 composite puts you at the 65th percentile, meaning you scored as well as or better than 65% of the reference group. The AAMC updates percentile tables annually; the values in this calculator reflect 2021-2023 averages. For the current year's tables, consult the AAMC MCAT resources page.

MCAT Score Range and Percentile Table

The table below shows composite scores at key milestones with their approximate percentile ranks and the admissions tier each score typically reaches. Use it alongside the calculator above to interpret your section results in context.

Percentile ranks are approximate based on AAMC 2021-2023 data. The AAMC updates tables annually; verify current percentiles at aamc.org.

What Is a Good MCAT Score for Medical School?

The answer depends entirely on which programs you are targeting and the strength of the rest of your application. Three thresholds give you a practical framework: the national median for MD applicants, the competitive floor for top-50 programs, and the DO program range.

Average MCAT Score for MD Applicants and Matriculants

Among all MCAT test-takers, the average composite is approximately 506 to 507. That group includes many people who test once, score below their expectations, and do not apply. For students who actually submitted primary applications to allopathic (MD) programs, the average composite rises to around 511. Enrolled MD students (matriculants) average approximately 511 to 512. The AAMC publishes exact averages each year in its MCAT Score Report; those averages have been stable over the past several testing cycles.

Competitive Score for Top MD Programs

At research-intensive MD programs typically ranked in the top 50, median accepted composites cluster between 515 and 520. At the most selective programs, including Harvard Medical School, Johns Hopkins, Mayo Clinic School of Medicine, and Washington University in St. Louis School of Medicine, median accepted composites are typically 522 to 524 or higher. A useful working target for applicants who want a realistic chance at top-50 programs is a composite of 515 or above, placing you in the 82nd percentile or higher. Scoring below 515 does not automatically disqualify you, but a weaker MCAT score means other parts of the application (research, GPA, clinical experience, personal statement) carry more weight.

Good MCAT Score for DO Programs

Osteopathic medical schools (DO programs) accept a wider composite range. Most DO programs have median accepted composites between 503 and 507. A composite around 504 to 506 is competitive for the majority of DO programs, and applicants at 508 or above are in a strong position. Some osteopathic schools review applicants at 498 or lower when accompanied by a strong overall file and genuine interest in osteopathic medicine. The AACOM website (American Association of Colleges of Osteopathic Medicine) publishes entering class profiles with median MCAT scores by school.

MCAT Section Breakdown

Each section is designed to test a distinct set of competencies, and section-level performance matters beyond the composite. Medical schools can see your four individual scaled scores and use them to identify disciplinary strengths and weaknesses.

CPBS: Chemical and Physical Foundations

The Chem/Phys section (59 questions, 95 minutes) covers general chemistry, organic chemistry, biochemistry, physics, and biology concepts applied to living systems. It is the most science-intensive section for students without strong physical science backgrounds. The passage-based format means you are applying foundational knowledge to unfamiliar experimental scenarios, not simply recalling facts. Most applicants find this section the most straightforward to improve with targeted content review.

CARS: Critical Analysis and Reasoning Skills

CARS (53 questions, 90 minutes) is the section most distinctive to the MCAT. It contains no science content: passages come from the humanities, social sciences, and population health, and questions test inference, argument structure, and the ability to identify an author's reasoning from text alone. CARS scores tend to be less responsive to short-term cramming than science sections. Applicants who struggle with CARS typically benefit most from daily timed passage practice over an extended period of months rather than weeks. A CARS score below 125 draws attention from admissions committees and triggers section-minimum screening at some programs.

BBFL: Biological and Biochemical Foundations

The Bio/Biochem section (59 questions, 95 minutes) is the section most closely aligned with standard pre-med coursework: biology, biochemistry, genetics, molecular biology, and physiology. Most applicants find this section the most familiar, and high scores here are expected rather than differentiating at competitive programs. Low BBFL scores relative to CPBS and PSBB can signal gaps in foundational life-science preparation.

PSBB: Psychological, Social, and Biological Foundations

The Psych/Soc section (59 questions, 95 minutes) covers how psychological and sociological factors, along with biological mechanisms, shape health outcomes and behavior. Most pre-med students encounter this material in introductory psychology and sociology courses. The content list is long but largely memorization-friendly compared to CARS. For applicants who majored in the biological sciences, Psych/Soc is often where they can gain an edge with focused content review in the weeks before test day.

How to Use the Backward Score Solver

The backward solver above answers a different question than the forward calculator: instead of "what is my score given these answers," it asks "how many questions do I need to get right to reach a target score." Enter any target composite from 472 to 528, and the tool returns the approximate number of correct answers per section required to reach that target, assuming even performance across all four sections.

Consider Jordan, a pre-med student who has been scoring around 510 on practice tests and wants to push to 515 before test day. The backward solver for 515 returns: Chem/Phys (CPBS) 46/59 correct, CARS 41/53 correct, Bio/Biochem (BBFL) 46/59 correct, Psych/Soc (PSBB) 46/59 correct. Jordan can compare those targets against the section breakdowns from recent practice tests to identify which section has the largest gap and allocate remaining study time accordingly. Because the MCAT uses equating rather than a fixed raw-to-scaled conversion, these targets are estimates, not guarantees, and actual requirements vary slightly by test form. The backward solver is a planning benchmark, not a promise.

For a second example: Marcus is applying to a program with a median accepted composite of 520. The backward solver shows he needs approximately 51/59 correct on CPBS, 46/53 on CARS, 51/59 on BBFL, and 51/59 on PSBB. That level of performance requires answering roughly 86% of questions correctly across all sections, a benchmark that separates applicants who are content-solid from those who are also strong at reasoning under time pressure. Seeing those raw-number targets often clarifies the gap between current performance and goal more concretely than looking at scaled scores alone.