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NBME Score Conversion: CBSSA to Step 1 Converter

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by Alec Palmerton, MD in Step 1 Pass-Fail
NBME Score Conversion Tool

Looking for a Step 1 NBME score converter? Do you want to know what you would have scored on Step 1 before it went pass-fail? Are you confused about what to make of the new pass-fail Step 1 and NBME score reports?

If so, you’ve come to the right place. Here, we have created a CBSSA to predicted Step 1 score converter. HINT: bookmark this page if you plan on taking any Step 1 NBMEs (PC: “Ctrl + D,” Mac: “Command + D”).

Why is it useful to know what you would have scored on Step 1, even if it’s pass-fail now? Because as we’ve discussed before, Step 1 was the single-best predictor of Step 2 CK scores. And given how important Step 2 CK is becoming in residency applications, it’s useful to know your trajectory so you can course-correct.

Table of Contents

How to Use the NBME Step 1 Score Converter

To use our NBME score conversion tool, all you have to do is count the number of questions you missed. To do so, first click “View Your Results Interactively.”

View Your Results Interactively

View Your Results Interactively

Review Incorrect

Click “Review Incorrect,” then count the number of questions you missed

Finally, enter the number of questions you got incorrect into the NBME Score Converter. The score conversion tool will convert it to your predicted Step 1 score.

NBME Score Conversion Tool

Enter the number of incorrects into the NBME Score Converter to get your predicted Step 1 score

 

NBME (CBSSA) 25 to Step 1 Score Converter

Each question on Step 1 CBSSA 25 is worth 1.05 points.

To get a 250 on CBSSA 25, you could only miss 21 questions.

NBME (CBSSA) 26 to Step 1 Score Converter

Each question on Step 1 CBSSA 26 is worth 1.11 points.

To get a 250 on CBSSA 26, you could only miss 23 questions.

NBME (CBSSA) 27 to Step 1 Score Converter

Like CBSSA 26, each question on Step 1 CBSSA 27 is worth 1.11 points.

To get a 250 on CBSSA 27, you could only miss 23 questions.

NBME (CBSSA) 28 to Step 1 Score Converter

Each question on Step 1 CBSSA 28 is worth 1.05 points.

To get a 250 on CBSSA 28, you could only miss 23 questions.

NBME (CBSSA) 29 to Step 1 Score Converter

Each question on Step 1 CBSSA 29 is worth 1.09 points.

To get a 250 on CBSSA 29, you could only miss 23 questions.

NBME (CBSSA) 30 to Step 1 Score Converter

Each question on Step 1 CBSSA 30 is worth 1.15 points. It is widely considered to be the most challenging NBME, and the best-fit line backs that up.

To get a 250 on CBSSA 30, you could only miss 24 questions.

Step 1 Passing Score Percentage

What is the Step 1 passing score percentage? We won’t know with certainty. However, we can determine what percentage you would need on each CBSSA (NBME) to pass Step 1.

The passing score percentage for each of the Step 1 NBMEs is:

  • CBSSA 25 – 64% correct (73 incorrect)
  • CBSSA 26 – 64% correct (72 incorrect)
  • CBSSA 27 – 65% correct (71 incorrect)
  • CBSSA 28 – 63% correct (75 incorrect)
  • CBSSA 29 – 64% correct (72 incorrect)
  • CBSSA 30 – 65% correct (71 incorrect)

Assuming Step 1 is scored similarly to CBSSA 25-30, you would need somewhere between 63 to 65% correct to attain the passing score of 196.

Want FREE Cardiology Flashcards?

Cardiology is key for impressive USMLE scores. Master cardiology from a Harvard-trained anesthesiologist who scored USMLE 270 with these 130+ high-yield flash cards. You’ll be begging for cardio questions - even if vitals make you queasy.

Subscribe