NBME Score Conversion and Report Guide
Start with the score scale printed on the report. Current CCSSA, CBSSA, and CCMSA reports are different products, so this page shows what can be entered and what should be read directly.
Converting for Step 2 CK?
Choose Step 2 CK and enter the CCSSA form number shown on your NBME score report. Current supported forms are 9–15.
Checking Step 1 readiness?
Current CBSSA reports use EPC and provide an official pass probability. Read those fields directly; do not enter EPC in the calculator's Step 2 CCSSA field.
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NBME 32 score conversion: what to enter
For a current NBME 32 score conversion, start with the equated percent correct, likely range, and estimated probability of passing printed on the CBSSA report. There is no supported reason to force that EPC onto the Step 2 CCSSA scale.
NBMEcalc therefore does not accept current Form 32 EPC as a direct NBME calculator input. For a test-date decision, use the official report's estimated probability of passing and low-pass range, then compare it qualitatively with other recent evidence.
Find the right NBME form family
NBME form numbers are not interchangeable across Step exams. This hub remains the primary page for the family. Dedicated pages are admitted only when the user task is distinct and the page adds a real preset tool or report workflow.
Step 2 CK CCSSA forms 9-15
Use this family for Step 2 CK score conversion and readiness checks.
- NBME 10 Step 2 score conversion
- NBME 11 score conversion
- NBME 14 score conversion
- NBME 15 Step 2 CK score conversion
Most Form queries remain consolidated here. Form 15 has a dedicated pilot because Search Console and the live SERP both show a distinct calculator-shaped task.
Open Step 2 predictorStep 1 CBSSA forms 26-32
Use this family for Step 1 pass-readiness planning.
- NBME 28 score conversion
- NBME 29 score conversion
- NBME 30 score conversion
- NBME 32 score calculator
Step 1 is pass/fail. The Form 30 pilot reads the official CBSSA ranges instead of fabricating a raw-wrong-answer formula; Form 32 stays consolidated here to protect its existing ranking.
Open Step 1 predictorStep 3 CCMSA forms 5-7
Use this family for Step 3 planning, especially when paired with CCS practice.
- NBME 6 Step 3 score conversion
- NBME 7 Step 3 score conversion
- Step 3 NBME score conversion
- NBME Step 3 score conversion
Step 3 search demand is served on one evidence page. It explains the current 10-800 CCMSA scale and why NBMEcalc does not publish an unsupported Form 6/7 conversion table.
Open Step 3 predictorNBME to Step 2 CK Conversion Chart
The quick answer is that a current CCSSA Total Score already estimates Step 2 CK performance. Enter that 1-300 score unchanged; converting 240 into a different midpoint would double-transform the report's estimate.
If your goal is to test one weak clinical area rather than overall readiness, use the guide to choose a CMS subject form.
Check the current official CCSSA sample report| Official report field | What it means | What NBMEcalc does |
|---|---|---|
| Total CCSSA Score | A 1-300 estimate of Step 2 CK performance under comparable knowledge and testing conditions. | Enter it unchanged. NBMEcalc keeps it as the assessment midpoint. |
| Score range | The report's uncertainty around the Total CCSSA Score. | Read it alongside, not as a replacement for, NBMEcalc's model-generated range. |
| Content-area feedback | Relative strengths and weaknesses within the assessed content. | Use it for study planning; it is not another overall score input. |
Source: current NBME CCSSA sample score report. NBMEcalc's combined multi-source output remains an independent, unvalidated planning estimate and does not replace the official report.
NBME to Step 1 (Pass / Fail) Conversion
Step 1 is pass/fail. The official CBSSA report already contains readiness information, so start with those fields rather than an unofficial numeric conversion chart.
| Official report field | How to use it |
|---|---|
| Equated percent correct | Compare performance across recent CBSSAs using the report's own scale. |
| Estimated probability of passing | Use the probability printed by the official score report as the primary readiness signal. |
| Low-pass range | Treat overlap with this range as uncertainty that deserves another official checkpoint or advisor discussion. |
UWSA, Free 120, and other source adjustments
UWSA inputs receive source-specific model treatment. No fixed subtraction is an official conversion.
Free 120 is a useful late-stage readiness signal. Use it alongside a recent NBME rather than treating any one input as definitive.
Enter the 3-digit estimate shown on the Step 2 Self-Assessment report. The model preserves that value and uses a lower, unvalidated source weight when combining assessments.
Model handling is built into our calculator. Enter the value from the corresponding report scale.
Related conversion calculators
A single NBME is useful, but the forecast improves when recent inputs agree. These related pages cover the other conversion searches that showed up in Search Console.
How the calculator treats supported scores
A current Step 2 CCSSA Total Score is retained as the assessment midpoint. Other supported sources use source-specific mappings and recency weighting. Those additional mappings are independent model assumptions, not official NBME or USMLE conversion rules.
A reproducible outcome dataset and holdout validation report are not currently published. For that reason, we do not claim a verified cohort size, median error, or form-specific accuracy ranking. The public methodology page records the current assumptions and material changes.
What this is not: a guarantee. Test-day performance, content domain shifts, and the NBME's own psychometric adjustments mean any single prediction has natural variance. Treat the displayed range as planning context—not ground truth—and compare it with official guidance.
- Official facts linked to primary sources
- Assessment families kept separate
- Uncertainty shown with every estimate
- Public methodology and change log
Frequently asked questions
How accurate is NBME score conversion?+
NBMEcalc does not currently publish a reproducible holdout cohort or a verified error rate. Treat the conversion as an independent planning heuristic, use the full displayed range, and keep the official NBME score report as the primary readiness source.
Which NBME forms are most predictive of my Step 2 CK score?+
Use a recent Comprehensive Clinical Science Self-Assessment (CCSSA) and read its official score report first. This independent converter is most useful when you combine more than one recent CCSSA result with UWSA or Free 120 rather than relying on a single form.
Is the NBME score the same as a USMLE Step score?+
No. A practice-assessment score and a final USMLE result come from different administrations. This converter applies published internal assumptions; it is not an official one-to-one mapping.
How do I convert UWSA scores to a Step score?+
The calculator treats UWSA 1 and UWSA 2 separately, using current internal adjustments of −5 and −2 before aggregation. These are model assumptions, not official universal offsets.
Does NBME conversion work for the new pass/fail Step 1?+
For Step 1, use the official CBSSA report's estimated probability of passing and low-pass range first. NBMEcalc also shows an experimental model estimate, but it is not a replacement for the official report.
Can I trust online NBME conversion charts?+
Be careful with any chart that does not state its assessment family, date, scale, sample, exclusions, and validation method. NBMEcalc publishes its assumptions and explicitly does not claim a validated cohort yet.