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 guides

Scores by specialtyPercentilesChance of passingHow accurate is it?

Study stats

UWorld averageCMS formsDedicated study time

Test conversions

NBME 9NBME 10NBME 11NBME 12NBME 13NBME 14NBME 15NBME 16UWSA 1UWSA 2UWSA 3AMBOSS SAFree 120Old Free 120

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.