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MCAT Blog
How Is the MCAT Scored?
A Complete Breakdown for Pre-Meds
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The Medical College Admission Test (MCAT) is one of the most important steps on the road to medical school. Yet even students who have spent months preparing are often unsure how the exam is actually scored. How does the AAMC convert raw scores? How many questions can you miss and still earn a certain scaled score? How long are your MCAT scores valid?
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Table of Contents
- The Four Sections of the MCAT
- Raw Score vs. Scaled Score
- How Many Questions Can You Miss and Still Get a Certain Score?
○ Approximate Raw Scores for a 125 per Section (500)
○ Approximate Raw Scores for a 128 per Section (512)
○ Approximate Raw Scores for a 130+ per Section (520) - MCAT Percentiles
- Confidence Bands
- Score Profiles
- How Long Are MCAT Scores Valid?
- FAQ
- Summary
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The Four Sections of the MCAT
The exam contains four equally weighted sections, each scored separately:
- Chemical and Physical Foundations of Biological Systems (Chem/Phys)
- Critical Analysis and Reasoning Skills (CARS)
- Biological and Biochemical Foundations of Living Systems (Bio/Biochem)
- Psychological, Social, and Biological Foundations of Behavior (Psych/Soc)
Your total MCAT score is the sum of these four section scores.
MCAT Raw Score vs. Scaled Score
Raw Score: Your raw score is the number of questions you answer correctly.
- No penalty for guessing
- No penalty for wrong answers
- Unanswered questions are counted as incorrect
Scaled Score: Each raw score is converted to a scaled score from 118 to 132. Total scores fall between 472 and 528.
The AAMC uses a process called statistical equating, which ensures that the same scaled score means the same level of performance across different test dates.
The raw-to-scaled conversion formulas are not released.
If you want to know the best MCAT resources ranked by score, check out our guide here.
How Many Questions Can You Miss and Still Get a Certain Score on the MCAT?
While the AAMC does not publish exact conversions, patterns from official practice exams offer helpful approximations.
MCAT Approximate Raw Scores for a 125 per Section (500)
- Chem/Phys: ~35–38 correct
- CARS: ~30–32 correct
- Bio/Biochem: ~36–39 correct
- Psych/Soc: ~38–40 correct
MCAT Approximate Raw Scores for a 128 per Section (512)
- Chem/Phys: ~44–46 correct
- CARS: ~36–38 correct
- Bio/Biochem: ~45–47 correct
- Psych/Soc: ~45–48 correct
MCAT Approximate Raw Scores for a 130+ per Section (520)
- Chem/Phys: ~48–52+ correct
- CARS: ~40–42+ correct
- Bio/Biochem: ~50–52+ correct
- Psych/Soc: ~50–53 correct
These numbers vary because scaled scoring accounts for test difficulty differences.
If you want to know the best time to take the MCAT, check out our guide here.
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MCAT Percentiles
Your score report includes a percentile rank, comparing your performance to test takers from the past three years.
Examples:
- 508 ≈ 70th percentile
- 515 ≈ 90th percentile
- 521 ≈ 98th percentile
Percentiles help contextualize your performance relative to other pre-meds.
How percentiles work: A percentile shows how your score compares to other test takers. For example, if your score is in the 90th percentile, you performed better than 90% of students who took the exam in the past three years. It’s not about the number of questions you got “right” versus “wrong,” but rather how your performance ranks among all test takers.
MCAT Confidence Bands Explained
A confidence band is a 1–2 point range around each section score reflecting normal measurement variability.
If you earn a 510 with a confidence band of 508–512, the AAMC advises admissions committees to view any applicant within that range as performing at a similar level.
This is why retaking the MCAT only makes sense if you are reasonably sure you can improve by at least 4 points.
What Are MCAT Score Profiles?
Your score report also provides a detailed section-by-section breakdown. Since all sections are weighted equally, medical schools often use this profile to evaluate consistency and identify strengths and weaknesses.
How Long Are MCAT Scores Valid?
Most U.S. medical schools accept MCAT scores that are 2–3 years old.
Typical ranges:
- Many schools: up to 3 years
- Some schools: only 2 years
- Very few: accept older than 3 years
Always check each school’s specific policy before applying.
Tip: The MSAR (Medical School Admission Requirements) is a great resource to check each school’s MCAT score policies and other admission requirements. It’s updated yearly and can help you plan which scores to use when applying.
Frequently Asked Questions (FAQ)
Do wrong answers hurt my score?
No. The MCAT uses rights-only scoring. Wrong answers do not reduce your score, so you should always guess.
Does every test date have the same difficulty?
Not exactly—difficulty varies slightly. That’s why the AAMC uses equating to ensure fairness.
Why doesn’t the AAMC release raw-to-scaled conversions?
Because scaling is adjusted for each exam based on its difficulty. Publishing a fixed table would be misleading.
Is one section weighted more heavily than another?
No. All four sections are weighted equally.
Are MCAT percentiles updated every year?
Yes. The AAMC updates percentile ranks each May based on the previous three years of data.
Can medical schools see my raw score?
No. They only see your scaled section scores, total score, percentile rank, and confidence bands.
What if my section scores are uneven?
Admissions committees can see your section profile. Large discrepancies may raise questions, but they do not automatically disqualify you.
Summary
The MCAT scoring system is designed to be fair across different test dates, which is why the AAMC uses scaled scores rather than raw percentages. Each of the four sections is converted to a score between 118–132, producing a total score between 472–528. Percentiles and confidence bands help schools interpret these scores in context.
Although the AAMC does not publish exact raw-to-scaled conversions, typical performance patterns show roughly how many questions you can miss to achieve target scores. MCAT scores remain valid for 2–3 years, depending on school policies, and because wrong answers are not penalized, guessing is always recommended.
Note: Keep in mind that the number of questions you can miss isn’t fixed—MCAT scaling accounts for variations in test difficulty. Some exams may be slightly harder or easier, so the scaled score reflects both your raw performance and how challenging that particular test was.
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