Bundle & Save!

Free Shipping in the USA

Shelf Exam Percentiles: How NBME Subject Scores Really Work

by Hawar Palani in MedSchool Tips

You finish your surgery rotation, sit for the shelf, and a week or two later get a number back. Maybe it's a 74. Maybe it's an 81. And you have absolutely no idea whether that's honors-worthy, solidly average, or a problem.

That confusion is almost universal in third year. Shelf scores don't look like Step scores, every clerkship seems to grade differently, and the classmate who "did great" on medicine might have scored lower than you did on psych.

Here's how shelf scores and percentiles actually work, and how to figure out what yours means.

How Do Shelf Exam Percentiles Work?

NBME clinical science subject exams, better known as shelf exams, report a scaled score that reads like a percent correct, and NBME converts that score into a percentile rank based on norms from a reference group of first-time takers at US medical schools. Your percentile tells you what percentage of that reference group scored at or below you.

The key thing to understand: each subject has its own norms. The same score can land at a very different percentile on the Medicine shelf than on the Psychiatry shelf, so you can't compare raw numbers across rotations. NBME also accounts for when in the academic year you take the exam, since students later in third year generally score higher than students on their first rotation.

For exact, current conversions between scores and percentiles, check NBME's subject examination score interpretation materials and your school's clerkship grading policy. Your school's clerkship office can usually tell you which norms they use.

The NBME Shelf Exams and How They're Scored

Which Shelf Exams Exist

NBME offers clinical science subject exams in Ambulatory Care, Clinical Neurology, Family Medicine (Modular), Medicine, Obstetrics and Gynecology, Pediatrics, Psychiatry, and Surgery, plus advanced exams in Emergency Medicine and Internal Medicine. Most students take a core set of these during their clerkship year, depending on how their school structures rotations.

What the Score Means

Shelf scores are equated, which means NBME adjusts for differences in difficulty between exam forms. A given score reflects roughly the same level of performance no matter which form you got. It looks like a percent correct, but it isn't a simple count of the questions you got right.

Why Timing in the Year Matters

A student taking the Medicine shelf as their first rotation has seen far less clinical material than a student taking it after five other clerkships. NBME has historically provided norms that account for this, and many schools compare your score against students who took the exam at a similar point in the year. That's fairer, but it also means a score that's great early in the year might look closer to average if you'd taken it later.

What Shelf Percentiles Mean for Your Grade

Here's where it gets messy: NBME reports scores and percentiles, but your school decides what they mean for your grade.

Passing Thresholds

Many schools set a minimum shelf performance to pass the clerkship. In general, these thresholds tend to sit fairly low on the percentile scale, often somewhere in roughly the bottom 5–20% depending on the school. If you're above that line, the shelf usually won't be what fails you.

Honors Thresholds

For honors, schools often look for a shelf score in roughly the top 10–40% of the reference group, combined with strong clinical evaluations. Some schools use a fixed percentile cutoff, some use a score cutoff, and some blend the shelf into a weighted composite with evaluations and other assessments. The range is wide, so your school's policy is the only number that truly matters.

How Much the Shelf Counts

The weight of the shelf in your final clerkship grade varies a lot. At some schools, it's a significant chunk of your grade. At others, clinical evaluations dominate and the shelf is closer to a pass/fail checkpoint. Read your clerkship syllabus at the start of every rotation so you know what you're aiming for.

How to Estimate Your Shelf Percentile Before Test Day

Step 1: Use NBME Practice Forms

The NBME Clinical Science Mastery Series offers practice forms for Neurology, Emergency Medicine, Family Medicine, Medicine, OB/GYN, Pediatrics, Psychiatry, and Surgery. Each form is $21, has 50 questions, runs 1 hour 15 minutes at standard pace, and translates your performance to an approximate subject-exam score. That's the closest thing to a real shelf preview you can get.

Step 2: Take One Early and One Late

Taking a form in the first half of your rotation shows you where your gaps are while there's still time to fix them. Taking another in the final week tells you whether your studying is working and roughly where you're likely to land.

Step 3: Compare Against Your School's Thresholds

Once you have an approximate score, compare it to your school's pass and honors cutoffs. If you're close to a threshold, focus your final days on the highest-yield topics for that rotation instead of trying to cover everything.

Step 4: Do Questions Every Day of the Rotation

Steady question practice throughout the rotation tends to beat cramming at the end. Even a modest daily block keeps you tuned to NBME-style questions and helps your clinical reasoning on the wards at the same time. For a rotation-by-rotation plan, see our shelf exam study guide by rotation.

What Most Students Get Wrong About Shelf Exam Percentiles

The first mistake is comparing scores across rotations. Each shelf has its own norms, so an 80 on one exam and an 80 on another can mean very different things. Compare your percentile within a subject, not your raw score across subjects.

The second mistake is relying on classmates' or forum cutoffs. "You need an 85 for honors" might be true at one school and completely wrong at yours. Shelf exam percentiles only matter in the context of your school's grading policy.

The third mistake is ignoring the timing effect. If your first rotation shelf feels like a struggle, that's expected. You're being compared fairly, but you're also earlier on the learning curve than students taking it later.

The fourth mistake is treating shelves as separate from Step 2 CK. Everything you learn for your shelves feeds directly into Step 2 CK. Students who study well for each shelf tend to start dedicated Step 2 CK prep from a much stronger position.

Studying for Shelves and Step 2 CK at the Same Time

Because shelf content and Step 2 CK overlap so heavily, the smartest move is using resources that serve both. The Complete USMLE Step 2 Guide from MedSchoolBro is a 300-page hardcover with an eBook built to cover both shelf exams and Step 2 CK, so the review you do on each rotation carries straight into dedicated. Pair it with the Step 2 CK Question Bank from MedSchoolBro for 2,000+ NBME-style questions you can work through rotation by rotation.

 

Frequently Asked Questions

What is a good shelf exam percentile? It depends on your school's grading policy. Passing thresholds often sit roughly in the bottom 5–20%, while honors often require something in roughly the top 10–40%, usually combined with strong clinical evaluations. Check your clerkship syllabus for the exact cutoffs.

Are shelf exam scores the same as percent correct? Not exactly. Shelf scores are equated scaled scores that read like a percent correct, but they're adjusted for differences in form difficulty, so they aren't a simple count of questions answered correctly.

Why does my shelf percentile change depending on when I take it? Students later in the clerkship year have more clinical experience and tend to score higher. NBME has historically provided norms that account for timing, so the same score can map to a different percentile depending on when in the year you tested.

Where can I find official shelf exam percentiles? NBME publishes score interpretation materials for its subject exams, and your school receives the norms it uses for grading. Your clerkship office is the best place to ask which norms apply to you.

Related Posts

Average Step 2 CK Scores by Specialty: What Matched Applicants Score

At some point during third year, the question shifts from "will I pass Step 2 CK?" to "is my score good enough for the specialty I actually want?" And suddenly you're comparing yourself to people you've never met, using spreadsheets you found on a forum. That pressure is real, and it's gotten heavier since Step 1 went pass/fail. Step 2 CK is now the main standardized score many programs use to compare applicants. Here's what the data generally shows by specialty, how to read it without spiraling, and where to find the exact current figures. What Are the Average Step 2 CK Scores by Specialty? Overall, the national Step 2 CK average sits in roughly the high 240s to around 250, and the minimum passing score is 218 for exams on or after July 1, 2025. Matched applicants in most specialties average above that national mean. In recent NRMP data, the most competitive specialties cluster roughly in the mid-250s to low 260s, competitive specialties roughly in the high 240s to mid-250s, moderately competitive fields roughly in the mid-to-high 240s, and primary care and less score-driven specialties roughly in the low-to-mid 240s. Those are approximate ranges to help you orient. The exact, current averages for matched and unmatched applicants are published by NRMP in its Charting Outcomes in the Match reports, with separate reports for US MD seniors, US DO seniors, and international medical graduates. Always check the most recent edition, because averages have been rising year over year. Approximate Step 2 CK Score Tiers by Specialty Rather than pretending to give you a precise number for every field, it's more honest (and more useful) to group specialties by where matched applicants generally fall. Use these tiers as a starting point, then pull the exact figures from Charting Outcomes. Tier 1: Highly Competitive (Roughly Mid-250s to Low 260s) Specialties like dermatology, plastic surgery, orthopedic surgery, otolaryngology (ENT), neurosurgery, and interventional radiology tend to sit at the top. Matched applicants in these fields usually score well above the national average. A strong score here doesn't guarantee anything on its own, but a score well below the typical range makes the rest of your application work much harder. Tier 2: Competitive (Roughly High 240s to Mid-250s) General surgery, diagnostic radiology, anesthesiology, and many internal medicine programs at highly academic institutions often fall here. Scores in this range keep you competitive, and program type matters a lot. A university program in a popular city may expect more than a community program in the same specialty. Tier 3: Moderately Competitive (Roughly Mid-to-High 240s) Internal medicine as a whole, emergency medicine, OB/GYN, and neurology commonly land in this band. These fields value clinical performance, letters, and demonstrated interest heavily, so a score near the national average is generally in range. Tier 4: Less Score-Driven (Roughly Low-to-Mid 240s) Family medicine, pediatrics, psychiatry, and physical medicine and rehabilitation (PM&R) typically see matched applicants a bit closer to the overall mean. That doesn't mean these specialties are easy to match. Psychiatry in particular has become more competitive, and strong programs in any field can be selective. Two important notes. First, individual specialties can move between tiers from year to year as applicant numbers shift, so treat these groupings as a general map, not fixed rules. Second, ophthalmology and urology run their own matches (the SF Match and the AUA Urology Match), so you won't find them in NRMP's Charting Outcomes. Both are generally considered competitive, and their score data comes from those match programs instead. How to Read Specialty Score Data the Right Way Charting Outcomes is incredibly useful, but it's easy to misread. A few things to keep in mind: Matched Averages Aren't Minimums An average means plenty of matched applicants scored below it. If your target specialty's matched average is a few points above your score, you're not automatically out. Look at the full distribution in the report, not just the mean. Look at Your Applicant Group NRMP publishes separate data for US MD seniors, US DO seniors, and IMGs. The patterns can look different across these groups, so compare yourself to the report that matches your situation. Scores Are One Factor Among Many Program director surveys consistently show that programs weigh many factors: clerkship grades, letters of recommendation, research in some fields, interview performance, and perceived fit. Your score gets you looked at. The rest of your application gets you interviewed and ranked. Remember the Upward Trend Since Step 1 became pass/fail for exams on or after January 26, 2022, more students have treated Step 2 CK as their main chance to stand out. Averages have generally crept upward as a result, so last cycle's figures may already be slightly low for your cycle. How to Set Your Own Target Score Step 1: Find Your Specialty's Current Matched Average Pull the most recent Charting Outcomes report for your applicant group and note the matched average for your specialty. That's your reference point. Step 2: Aim a Little Above It Setting your goal a few points above the matched average gives you a buffer for test-day variability and a rising trend. If you're curious what it takes to reach the 250 range, our guide on how to score 250 on Step 2 CK lays out the approach. Step 3: Track Your Practice Scores Against That Target NBME's Comprehensive Clinical Science Self-Assessment (CCSSA) has 7 forms starting at $62, each with an estimated probability of passing. Combined with question bank performance and other full-length self-assessments, they show whether you're trending toward your target or need more time. The free Step 2 CK Free 120 diagnostic on MedSchoolGuru is a free way to add one more timed data point, with a scaled score estimate you can compare against your target. Step 4: Build a Backup Plan Early If your practice scores are consistently below your target specialty's range, it's worth thinking early about how to strengthen the rest of your application, whether to apply more broadly, or whether a parallel plan makes sense. Planning ahead beats scrambling after scores come out. What Most Students Get Wrong About Specialty Score Averages The first mistake is treating average Step 2 CK scores by specialty as cutoffs. They're averages of matched applicants, not minimums, and plenty of people match below them. The second mistake is using old numbers. Score averages have been rising, and a spreadsheet from a few cycles ago can understate what's competitive today. The third mistake is choosing a specialty based on your score alone. A score can open or narrow doors, but it shouldn't pick your career. Figure out what you actually enjoy, then build a plan to be competitive for it. The fourth mistake is ignoring program type. Within one specialty, expectations at a top academic program and a community program can differ quite a bit. Know which kinds of programs you're targeting. Training for Your Specialty's Score Range Once you know the range your specialty expects, the next step is a prep plan that actually moves you there. The Complete Step 2 Bundle from MedSchoolBro pairs the Step 2 CK Question Bank (2,000+ NBME-style questions and 7 self-assessment forms) with the Step 2 guide and flashcards, so you can learn the content, practice in exam style, and track your progress toward the score your specialty needs.   Frequently Asked Questions Where can I find the official average Step 2 CK scores by specialty? NRMP publishes them in its Charting Outcomes in the Match reports, with separate editions for US MD seniors, US DO seniors, and IMGs. Check the most recent report, since averages shift from cycle to cycle. Which specialty has the highest average Step 2 CK score? The highest averages usually come from specialties like dermatology, plastic surgery, orthopedic surgery, ENT, neurosurgery, and interventional radiology, where matched applicants roughly cluster in the mid-250s to low 260s. The exact order changes year to year, so confirm in the latest Charting Outcomes report. Can I match into a competitive specialty with a below-average Step 2 CK score? It's possible but harder. Strong letters, honors in key clerkships, research, and away rotations can help offset a lower score, and applying broadly matters even more. Is Step 2 CK more important now that Step 1 is pass/fail? For most programs, yes. With Step 1 reported as pass/fail, Step 2 CK is often the main standardized score programs use to compare applicants, which is one reason averages have been rising.

Learn more

When Do Step 2 CK Scores Come Out? A Realistic Timeline

You walked out of Prometric nine hours after you walked in, exhausted and replaying three questions you're sure you got wrong. And now the hardest part starts: waiting. Every day you refresh your email. Every week you check the forums to see if anyone who tested the same day got their score yet. It's a strange kind of limbo, especially when your residency application timeline depends on that number showing up. Here's exactly how Step 2 CK score release works, how long it usually takes, and how to plan around it. When Do Step 2 CK Scores Come Out? Step 2 CK scores are typically available within 4 weeks of your test date, but USMLE advises examinees to allow at least 8 weeks in case of delays. Scores are reported weekly, so your score drops on a release day rather than on a fixed number of days after your exam. Many students see their results land somewhere in the 3–4 week range. When your score is ready, you'll get an email notification from the organization you registered through: NBME if you're a US or Canadian MD or DO student, or FSMB if that's who you registered through. You then log in to that organization's account to view and download your score report. The report stays available for roughly 365 days, so download a copy as soon as you get it. After that window, you'll need an official transcript to see your results again. How the Score Release Process Works Knowing what happens behind the scenes makes the wait a little less mysterious. Scores Are Batched, Not Instant USMLE processes results in weekly batches. That means two students who tested a day apart might get scores the same week, while two students who tested the same day almost always get them together. It's also why forum threads tracking "who tested when" can give you a decent sense of when your batch might come through. Where to Check the Release Schedule USMLE posts score reporting information and any announced delays on USMLE.org. Students commonly report that releases tend to arrive midweek, but check the official schedule rather than relying on word of mouth, especially around holidays or exam changes. What Your Score Report Includes You'll see your three-digit score, your pass or fail outcome against the minimum passing score of 218 (for exams on or after July 1, 2025), and a performance profile showing relative strengths and weaknesses by content area. You won't see a percentile on the report itself. For that, USMLE publishes Score Interpretation Guidelines, and our post on what a good Step 2 CK score is helps you put the number in context. Why Your Score Might Be Delayed Most scores come out on the usual timeline. When they don't, it's usually for one of a few reasons. Exam or Standard Changes When USMLE updates an exam's format or passing standard, scores for a window of test dates can be held longer while the new data is analyzed. Step 2 CK changed format for exams on or after May 7, 2026 (sixteen 30-minute blocks in a 9-hour session), so if you're testing around a change like that, watch USMLE.org for any announced delays. Administrative or Testing Issues Occasionally, a score is held because of a technical problem at the test center, a question about your registration, or a review of a possible irregularity. These are uncommon, and if they apply to you, you'll typically be contacted directly. High-Volume Periods Spring and summer are peak testing seasons as students try to get Step 2 CK done before residency applications. Scores usually still come out on schedule, but it's one more reason to give yourself the full 8-week buffer USMLE recommends. How to Time Your Exam Around Residency Applications For a lot of students, the real question behind "when do Step 2 CK scores come out" is "will my score be ready before programs start reviewing applications?" With Step 1 pass/fail, many programs want to see a Step 2 CK score early in the season. Work Backward From When You Want the Score Pick the date you want your score in hand, then count back at least 8 weeks to find your latest safe test date. Testing a few weeks earlier than that gives you breathing room if something gets delayed. Leave Room for a Retake, Just in Case Nobody plans to fail, but knowing the rules helps you plan responsibly. You can take the same Step up to 3 times within a 12-month period, a 4th attempt must be at least 12 months after your first attempt and at least 6 months after your most recent, and there's a total limit of 4 attempts per Step. Testing early gives you options if your result isn't what you need. Make Sure Your Score Actually Reaches Programs Getting your score and having programs see it are two separate steps. Before you rely on a release date, make sure you understand how your USMLE transcript is released to programs through your ERAS account and whether any action is needed once a new score posts. What If Your Score Lands After Programs Start Reviewing? It isn't ideal, but it isn't fatal either. Many programs will still review an application without a Step 2 CK score, and some will wait to see it before deciding on interviews. If you know your score will be late, say so where it makes sense, keep the rest of your application strong, and make sure the new score is released to programs as soon as it posts. A score that arrives a little late is better than a rushed score that arrives on time. Don't Rush the Exam to Hit a Date If your practice scores aren't where you want them, pushing your exam a few weeks later usually beats testing underprepared just to get a score in earlier. If you do reschedule, do it early: Prometric change fees are $0 at 46+ days out, $35 at 31–45 days, $100 at 6–30 days, and $178 for Step 2 CK at 5 or fewer days. What Most Students Get Wrong About the Wait The first mistake is planning around the best-case timeline. Yes, a lot of scores come back in about 3–4 weeks. But if your application strategy only works if your score arrives in 3 weeks, it's a fragile plan. Build around 8. The second mistake is treating forum timelines as guarantees. Crowdsourced release reports are useful, but they're anecdotes. The official word on timing and delays lives on USMLE.org. The third mistake is forgetting to download the score report. It's only available for roughly a year. Save a copy the day you get it. The fourth mistake is spending the whole wait reliving the exam. Your score is already decided. Use the time to catch up on sleep, get ahead on your rotations, and work on the parts of your application you can still control. Haven't Tested Yet? Plan Your Prep Around the Timeline If you're still preparing, the best way to make the waiting game easy is to test with enough buffer and walk in confident. The Complete Step 2 Bundle from MedSchoolBro combines the Step 2 CK Question Bank (2,000+ NBME-style questions and 7 self-assessment forms), the Step 2 guide, and flashcards, so you can track your readiness and lock in a test date that leaves room for the score to come back on time.   Frequently Asked Questions How long does it take to get Step 2 CK scores back? Scores are typically available within 4 weeks of your test date, though USMLE recommends allowing at least 8 weeks. Scores are released in weekly batches, so the exact day depends on your batch. What day of the week do Step 2 CK scores come out? Scores are reported weekly, and students commonly report releases arriving midweek. Check USMLE.org for the official schedule and any posted delays rather than relying on forum chatter. How will I know when my Step 2 CK score is available? You'll get an email notification from the organization you registered through, usually NBME for US and Canadian MD and DO students. You then log in to view and download your score report, which stays available for about 365 days. When do Step 2 CK scores come out if there's a delay? There's no fixed date for delayed scores. USMLE posts announcements about delays on its website, and if your individual score is held for a specific reason, you'll typically be contacted directly.

Learn more

NBME Free 120 Step 2 CK: When to Take It and What It Tells You

It's the last week before Step 2 CK. You've finished your question bank (or you're close), you've done a few self-assessments, and everyone keeps telling you to "do the Free 120." But nobody explains what to actually do with it, or what it means if your percent correct comes back lower than you hoped. If that's where you are, you're in good company. The Free 120 is one of the most talked-about Step 2 CK resources, and one of the most misunderstood. Here's what it is, when it fits into your schedule, and how to get real value out of it. What Is the NBME Free 120 for Step 2 CK? The NBME Free 120 Step 2 CK set is a free collection of official sample questions published by USMLE and NBME on the NBME orientation site (orientation.nbme.org). As the name suggests, it's roughly 120 questions, written by the same organization that writes the real exam and delivered in an interface that closely mirrors what you'll see at Prometric. Most students take it in the final 3–7 days before their exam, under timed conditions, as a last confidence check and a test-day dress rehearsal. It does not give you an official three-digit score or a percentile. What you get is a percent correct and, more importantly, a set of questions that show you exactly how the test writers think. The sample is updated periodically to reflect the current exam content, so always use the version on the official site rather than an old PDF someone passed around in your class group chat. Don't confuse it with the free Step 2 CK Free 120 diagnostic on MedSchoolGuru. That's a separate, free 120-question set with different questions, and unlike the NBME version it gives you a scaled score estimate and a pass-likelihood readout. Because it doesn't use up the official questions, it works well as an earlier checkpoint in dedicated. Why the Free 120 Matters More Than Its Size Suggests A set of around 120 questions is tiny compared to the thousands you'll do in a QBank. So why does everyone treat it like a big deal? It's Written by the Test Makers Third-party question banks are excellent for volume and teaching, but they're still approximations. The Free 120 comes from the source. The question stems, the length, the way distractors are built, and the level of detail in the vignettes all reflect real NBME style. That makes it a calibration tool more than a content tool. It Shows You the Real Interface Test day is not the moment to figure out where the lab values button is or how the highlighter behaves. Taking the Free 120 in its official interface means the buttons, timer, and layout feel familiar when it counts. It Tests Your Endurance and Pacing Step 2 CK on or after May 7, 2026 is sixteen 30-minute blocks with no more than 20 questions per block, in one 9-hour session with at least 55 minutes of break time. Taking several Free 120 blocks back to back, at real pace, gives you a taste of that rhythm. If you find yourself rushing the last few questions of every block, that's a pacing problem you can fix before test day. When and How to Take It Step 1: Schedule It for the Final Week Most students take the Free 120 somewhere between 3 and 7 days before their exam. That leaves enough time to review every question carefully without turning it into a last-minute panic. Avoid taking it the night before. You want time to absorb the lessons and rest. Step 2: Simulate Test Conditions Sit at a desk, put your phone in another room, time each block, and take short breaks between blocks the way you would at Prometric. The more realistic the setup, the more useful the pacing information. Step 3: Review Every Question, Not Just the Misses For each question, ask yourself why the right answer is right and why each wrong answer is wrong. For questions you got right by guessing or narrowing down to two, review those as carefully as your outright misses. Those near-misses are where the last few points usually hide. Step 4: Turn Patterns Into a Short Final List Don't try to relearn medicine in the last few days. Instead, look for patterns. Are you missing "next best step in management" questions? Biostatistics? Ethics? Write down a short list of 5–10 high-yield fixes and spend your remaining days on those. Optional: Take It in a Prometric Practice Session Prometric offers paid practice sessions that let you sit sample material in an actual test center. It's not necessary for everyone, but if you get anxious in unfamiliar environments, a dry run can take some of the edge off test day. How Predictive Is Your Free 120 Score? This is the question everyone actually wants answered. The honest answer: it's a useful signal, but it's not an official score predictor. There's No Official Conversion NBME doesn't publish a conversion from Free 120 percent correct to a Step 2 CK three-digit score. Any conversion table you see online is crowdsourced from student reports, which can be helpful for a rough sense of direction but shouldn't be treated as precise. Use It Alongside Your Self-Assessments Your best estimate of where you'll land comes from looking at several data points together: your NBME CCSSA forms (7 available, starting at $62, each giving an estimated probability of passing), other full-length self-assessments, and your recent question bank performance. The Free 120 is one more point on that graph, not the whole graph. What a Strong Result Usually Means If your Free 120 percent correct is in line with or above what your self-assessments suggested, that's reassuring. It generally means your knowledge is translating to NBME-style questions and your pacing is solid. Go into test day with confidence. What a Lower Result Usually Means If it comes back lower than expected, don't panic. Look at why. A rough set of blocks after a bad night's sleep is very different from a consistent gap in one specialty. If your other self-assessments have been steady, one sample set shouldn't override them. If everything is trending down and you're nowhere near your goal, that's a conversation worth having about whether to adjust your test date, keeping in mind that Prometric appointment change fees rise the closer you get (no fee at 46+ days out, $35 at 31–45 days, $100 at 6–30 days, and $178 for Step 2 CK at 5 or fewer days). What Most Students Get Wrong About the Free 120 The first mistake is taking it too early. Some students burn the NBME Free 120 Step 2 CK set as a baseline weeks before the exam, then have nothing official left to use as a final calibration. If you want an early baseline, a CCSSA form or MedSchoolGuru's free Free 120 diagnostic is a better fit. The second mistake is treating it as a content review. Around 120 questions can't cover the breadth of Step 2 CK. Its value is in the style, the interface, and the pacing, not in filling every content gap. The third mistake is skimming the review. The questions you'll learn the most from are the ones you got right for shaky reasons. A rushed review throws away the best part of the resource. The fourth mistake is letting a single percent correct define your confidence. It's one data point at the very end of a long process. Read it in the context of everything else you've done. Building Up to the Free 120 the Right Way The Free 120 works best as the final check on a foundation you've already built with thousands of exam-style questions and regular self-assessments. The Step 2 CK Question Bank from MedSchoolBro gives you 2,000+ NBME-style questions plus 7 self-assessment forms, so you walk into your final week already used to the style and with plenty of data on where you stand. Then the Free 120 confirms what you already know instead of surprising you. If you're mapping out the weeks before that final check, our guide on how to score 250 on Step 2 CK walks through the bigger plan.   Frequently Asked Questions Is the NBME Free 120 Step 2 CK set actually free? Yes. The sample questions are published at no cost by USMLE and NBME on the official orientation site. Prometric also offers paid practice sessions if you want to take sample material in a real test center, but that's optional. When should I take the Free 120 for Step 2 CK? Most students take it 3–7 days before their exam. That gives you time for a thorough review and a short list of final fixes without cramming the night before. Does the Free 120 give you a three-digit score? No. You get a percent correct, not an official score or percentile. There's no NBME-published conversion, so use your CCSSA forms and other self-assessments for a better score estimate. Is there another free 120-question practice test for Step 2 CK? Yes. MedSchoolGuru offers its own free Step 2 CK Free 120 diagnostic on MedSchoolGuru, separate from the official NBME set. It's timed and gives you a scaled score estimate and pass likelihood, so it's a good earlier checkpoint while you save the NBME Free 120 for your final week. Should I retake the Free 120 if I've already done it? Retaking it can still help with pacing and interface familiarity, but your percent correct will be inflated because you remember the questions. Use it for review and rhythm, not for prediction.

Learn more

Leave a comment

Please note, comments need to be approved before they are published.

© 2026 MedSchoolBro.