Practice tests

Enter at least two tests. Tap the clock to add timing, which improves the prediction.

Optional detailsUWorld, AMBOSS, CMS, other predictors & more

Charts & guides

Score TwinsReal people who tested like you, and what they scoredWhat raises your scoreEvery study decision, measured on real exam scoresUWorld vs AMBOSSBoth qbanks against the scores of students who used themPredictor comparisonSix predictors tested head-to-head on the same real examsScore swings & late dropsA 20-point swing is the median, and other calming factsWhen to schedule your examRead your readiness off your latest practice score
Score guides
Study stats
NBME conversions
More conversions

Free USMLE Step 2 CK score predictor. Enter your NBME (forms 9–16), UWSA 1–3, Free 120, or AMBOSS self-assessment results and get a calibrated Step 2 CK prediction with percentiles, pass odds, score trajectory, and specialty comparisons. Built from thousands of real score reports. No signup, no email, and your scores never leave your browser.

Wondering how accurate it is? Read the methods, the blind-test results, and head-to-head comparisons with AMBOSS, PMSS, and other predictors.