How Predictive Is UWorld QBank for Step 2 CK?

UWorld QBank has been submitted to Predict My Step Score 71,469 times and tracked against the real Step 2 CK results students went on to report. In that data, UWorld QBank showed low predictive power: only a loose link to the real score.

What is UWorld QBank?

A question-bank percentage is your cumulative percent correct across a QBank (UWorld or AMBOSS). It reflects learning over the whole study period — first pass, second pass, timed and untimed modes mixed together — rather than a single timed sitting, so it behaves quite differently from a self-assessment and depends heavily on how you used the bank.

What is a good UWorld QBank score?

In our data, UWorld QBank scores ranged from 42% to 99%. The link is real but loose: two students with the same UWorld QBank score can finish well apart on the real exam. A "good" UWorld QBank score is one that puts your likely outcome comfortably above the score you need — run it through the predictor to see where you stand.

When should you take UWorld QBank?

A QBank percentage is not something you "take" — it accumulates. It is most meaningful once you have finished a full pass of the bank, and it says more about how you studied than about a single test day.

Does it matter when you take UWorld QBank?

Timing matters twice over. First, a score from six weeks out is a snapshot of a student who then kept studying, so early tests tend to sit below the real result — much of what looks like "underprediction" is simply improvement after the test. Second, our predictor does not treat every score you enter equally: each one is weighted by the exam's R² and by how recently you took it, with a recency factor that decays exponentially from your most recent test back to your oldest, and your three most recent scores drive the final adjustment. Enter the days-before-exam for each test honestly — it changes the answer.

Enter your UWorld QBank score

UWorld QBank score

Predict my Step 2 CK score

Takes you to the predictor with UWorld QBank already filled in — add your other practice exams there for the full prediction.

How UWorld QBank compares

Wondering whether to take UWorld QBank next? See which practice tests are most predictive.

UWorld QBank vs the other question banks

UWorld QBank is one of 2 question banks in our Step 2 CK data, and they are not interchangeable: predictive power differs from form to form. The others — AMBOSS QBank — each have their own page, and the full side-by-side ranking is available to premium users. How predictive is AMBOSS QBank?

Frequently asked

Is UWorld QBank accurate?

UWorld QBank showed low predictive power in our data: only a loose link to the real score. But no practice test is "accurate" on its own — most are taken while you are still improving, so the number you see is rarely the number you get. Combining your scores, weighted by each exam's track record and timing, gives a sharper answer than any single test. Predict your Step 2 CK score →

Does UWorld QBank overpredict or underpredict Step 2 CK?

UWorld QBank is reported as a percentage rather than a 3-digit score, so there is no direct over/under-prediction figure. Its overall predictive power in our data is low.

Is UWorld QBank or NBME 16 more predictive?

NBME 16 is more predictive in our data. The exact gap is part of the full ranking, which is available to premium users.

Where does this data come from?

71,469 UWorld QBank scores have been submitted to Predict My Step Score so far. Whenever a student also reports their actual Step 2 CK result, the pair goes into the model behind this page; it was last refit on 2026-05-14.

Can't I just ask ChatGPT how predictive UWorld QBank is?

Not reliably. A prediction is only as good as the paired data behind it: real UWorld QBank scores matched to the real Step 2 CK result those same students went on to get. General-purpose AI models are trained on forum posts and articles, not on verified outcomes, so what you get back is a summary of anecdotes rather than a calibrated estimate. The numbers on this page come from students who reported both. Read more →

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Data refreshed 2026-05-14.

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