NBME 15 to Step 2 CK conversion

Q: How accurate is NBME 15 alone for Step 2?

Used alone with timing, NBME 15 was about 5.7 points from the reported final score on average. The full predictor combines it with the other scores you enter.

Q: How do I convert my NBME 15 percent correct to a score?

Enter your raw percent correct on NBME 15 above and the tool converts it to the 3-digit NBME 15 score, then to a predicted Step 2 CK score. The conversion is based on real reports that listed both a percent and a score, and was cross-checked against published conversions.

Based on 603 real score reports that included an NBME 15 result. The actual Step 2 score was about 7 points higher than the NBME 15 score, on average. Used alone with timing, this result was about 5.7 points from the reported final score on average. The full predictor combines it with the other scores you enter.

Your NBME 15 score→—

Not sure what your 3-digit NBME 15 score is? Convert from % correct →

Each dot is one real report: their NBME 15 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. Correlation with the final score: r = 0.70 · Reports: 603.

The calculator assumes the test was taken about 8 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 15 underpredict your Step 2 score?

In the collected score reports, NBME 15 underpredicted the actual score by about 7 points on average. The conversion accounts for that average difference.

How accurate is NBME 15 alone for Step 2?

Used alone with timing, NBME 15 was about 5.7 points from the reported final score on average. The full predictor combines it with the other scores you enter.

How do I convert my NBME 15 percent correct to a score?

Enter your raw percent correct above. NBME 15 has 200 questions, so each one is worth about half a percent; the converter maps your percent to the 3-digit NBME 15 score (about 2.2 points per percent, based on real reports and cross-checked against published conversions) and then to a predicted Step 2 CK score.

Convert NBME 15 % correct to a 3-digit score

Took NBME 15 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 15 % correct→—

NBME 15 is newer, so this combines our limited reports with published conversion data — treat it as approximate (about ±5 points). Convert a different form →

Combine your scores

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