NBME 13 to Step 2 CK conversion

Q: How do I convert my NBME 13 percent correct to a score?

Enter your raw percent correct on NBME 13 above and the tool converts it to the 3-digit NBME 13 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 1,702 real score reports that included an NBME 13 result. The actual Step 2 score was about 11 points higher than the NBME 13 score, on average. Used alone, an NBME 13 score predicts the real result with a typical error of about ±6.1 points. Combining multiple tests usually reduces the error.

Your NBME 13 score→—

Not sure what your 3-digit NBME 13 score is? Convert from % correct →

Each dot is one real report: their NBME 13 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 = 0.69, n = 1,657.

The calculator assumes the test was taken about 14 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 13 underpredict your Step 2 score?

In the collected score reports, NBME 13 underpredicted the actual score by about 11 points on average. The conversion accounts for that average difference.

How accurate is NBME 13 alone at predicting Step 2?

A single NBME 13 score predicts the real result with a typical error of about ±6.1 points. The main predictor combines several tests, which usually reduces the error.

How do I convert my NBME 13 percent correct to a score?

Enter your raw percent correct above. NBME 13 has 200 questions, so each one is worth about half a percent; the converter maps your percent to the 3-digit NBME 13 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 13 % correct to a 3-digit score

Took NBME 13 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 13 % correct→—

Calibrated on real reports that listed both a percent and a 3-digit NBME 13 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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