NBME 12 to Step 2 CK conversion

Q: How do I convert my NBME 12 percent correct to a score?

Enter your raw percent correct on NBME 12 above and the tool converts it to the 3-digit NBME 12 score, then to a predicted Step 2 CK score. It is calibrated on real reports that listed both a percent and a score, and cross-checked against published conversions.

Based on 1,781 real score reports that included an NBME 12 result. The actual Step 2 score was about 14 points higher than the NBME 12 score, on average. Used alone, an NBME 12 score predicts the real result with a typical error of about ±6.4 points. Combining multiple tests usually reduces the error.

Your NBME 12 score→—

Not sure what your 3-digit NBME 12 score is? Convert from % correct →

Each dot is one real report: their NBME 12 result against the Step 2 CK score they went on to get. Hover or tap a dot to see that person's full test list. r = 0.67, n = 1,734.

The calculator assumes the test was taken about 21 days before the exam, the typical timing in the underlying reports. Taking it closer to test day shifts the prediction; the main predictor uses your exact timing and every other test you have taken.

Common questions

Does NBME 12 underpredict your Step 2 score?

In the collected score reports, NBME 12 underpredicted the actual score by about 14 points on average. The conversion accounts for that average difference.

How accurate is NBME 12 alone at predicting Step 2?

A single NBME 12 score predicts the real result with a typical error of about ±6.4 points. The main predictor combines several tests, which usually reduces the error.

How do I convert my NBME 12 percent correct to a score?

Enter your raw percent correct above. NBME 12 has 200 questions, so each one is worth about half a percent; the converter maps your percent to the 3-digit NBME 12 score (about 2.2 points per percent, calibrated on real reports and cross-checked against published conversions) and then to a predicted Step 2 CK score.

Convert NBME 12 % correct to a 3-digit score

Took NBME 12 offline and only have a raw percent correct? Estimate your 3-digit form score below — it also fills into the calculator at the top of the page, so you still get a Step 2 prediction.

Your NBME 12 % correct→—

Calibrated on real reports that listed both a percent and a 3-digit NBME 12 score, blended with published conversions (typically within about ±3 points). Convert a different form →

Combine your scores

Combine your practice scores and test dates in the full predictor. Open the predictor →

Charts & guides

Browse the score analyses, study-data pages, and assessment converters.

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