NBME 9 to Step 2 CK conversion

Q: How do I convert my NBME 9 percent correct to a score?

Enter your raw percent correct on NBME 9 above and the tool converts it to the 3-digit NBME 9 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 1,219 real score reports that included an NBME 9 result. The actual Step 2 score was about 21 points higher than the NBME 9 score, on average. Used alone, an NBME 9 score predicts the real result with a typical error of about ±6.9 points. Combining multiple tests usually reduces the error.

Your NBME 9 score→—

Not sure what your 3-digit NBME 9 score is? Convert from % correct →

Each dot is one real report: their NBME 9 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 = 0.66, n = 1,184.

The calculator assumes the test was taken about 42 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 9 underpredict your Step 2 score?

In the collected score reports, NBME 9 underpredicted the actual score by about 21 points on average. The conversion accounts for that average difference.

How accurate is NBME 9 alone at predicting Step 2?

A single NBME 9 score predicts the real result with a typical error of about ±6.9 points. The main predictor combines several tests, which usually reduces the error.

How do I convert my NBME 9 percent correct to a score?

Enter your raw percent correct above. NBME 9 has 200 questions, so each one is worth about half a percent; the converter maps your percent to the 3-digit NBME 9 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 9 % correct to a 3-digit score

Took NBME 9 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 9 % correct→—

Calibrated on real reports that listed both a percent and a 3-digit NBME 9 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 →