Keep Form 28 selected
This page opens with Step 1, NBME, and Form 28 already selected. Keeping the exact form matters because Step 1 CBSSA curves differ by form.
NBME 28 Step 1 tool
NBME 28 Score Conversion Calculator
Convert NBME 28 wrong answers or percent correct into an estimated Step 1 readiness signal. The calculator is preset to Form 28 and clearly separates community-based historical estimates from your official NBME equated percent correct and passing-probability report.
- NBME 28
- Default form
- 200
- Question count used
- Pass/Fail
- Current Step 1 reporting
NBME 28 calculator
Free NBME 28 Score Converter
Enter your missed-question count or percent correct from NBME 28 to estimate a historical three-digit score, range, and Step 1 readiness zone.
Estimated historical Step 1 score
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Estimated range
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Readiness zone
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Important limitation
NBME 28 Conversion Is an Educational Estimate
USMLE Step 1 is reported as Pass/Fail for exams administered on or after January 26, 2022. This independent NBME 28 score conversion tool is for study planning only and is not affiliated with NBME, USMLE, FSMB, ECFMG, or UWorld.
How to use it
How the NBME 28 Score Conversion Calculator Works
Searchers for NBME 28 score conversion usually want a preset calculator, a transparent example, and a cautious explanation of how the estimate differs from the official NBME score report.
Enter wrong answers or percent correct
Use wrong answers when your review notes show missed items. Use percent mode when your report or spreadsheet only gives a percent correct.
Read readiness, not an official score
Step 1 is Pass/Fail, so the useful output is whether the result is below, near, or above a practical passing-readiness range.
Compare with recent forms
NBME 28 is most useful when you compare it with nearby Step 1 forms such as NBME 29 or NBME 30, Free 120, and recent timed blocks rather than one isolated number.
Turn misses into a plan
After calculating, tag missed questions by system, discipline, timing, and reasoning error so the estimate leads to targeted review.
Use the broad Step 1 page for multi-form trends
If you are comparing NBME 25-31 together, the general Step 1 converter is a better hub. This page is for Form 28-specific searches and examples.
Examples and edge cases
NBME 28 Score Conversion Examples
Use these examples to understand what the input means before making any scheduling decision.
Example: 50 wrong answers
Entering 50 wrong answers on NBME 28 produces a community-based historical estimate near 220. Treat it as a study-planning signal, not an official result.
Example: 75% correct
For NBME 28, 75% correct is treated as about 50 missed questions out of 200 before conversion.
Borderline result
If the estimate sits close to the historical passing area, do not rely on one form. Review weak systems and confirm with another recent NBME or Free 120.
Strong result
A strong NBME 28 is more useful when it was timed, uninterrupted, and taken near your actual exam window. Untimed review can overstate readiness.
Comparison table
NBME 28 Inputs and Related Step 1 Conversions
Use this table to choose the correct input mode and decide when the broader Step 1 page is a better fit.
| Use case | Input | Best next step |
|---|---|---|
| NBME 28 wrong-answer conversion | 0-200 missed questions | Use this page when your review screen shows missed items. |
| NBME 28 percent correct | 0-100 percent correct | Use percent mode when you only know a percentage and want a fast Step 1 estimate. |
| Adjacent Step 1 forms | NBME 29 or NBME 31 | Use adjacent forms to judge whether NBME 28 was consistent or an outlier. |
| Broad Step 1 trend | NBME 25-31 | Use the Step 1 converter when comparing several forms at once. |
Official references
Official Sources for Step 1 and NBME Context
These official pages explain Step 1 reporting and NBME self-assessment context. NBME does not publish the community regression used by this independent calculator.
Related tools
Compare NBME 28 with Related Tools
Use these calculators when you want to compare Form 28 with the broader Step 1 converter, later Step 1 forms, Free 120, or Step 2 CK tools.
NBME 28 FAQ
NBME 28 Score Conversion FAQ
Is this NBME 28 conversion official?
No. It is an independent educational estimate and is not affiliated with NBME or USMLE.
Does Step 1 still report a three-digit score?
No. Step 1 is reported as Pass/Fail for exams administered on or after January 26, 2022, so this page uses historical score language only for readiness context.
Can I enter percent correct for NBME 28?
Yes. Percent mode converts the percentage to an estimated missed-question count out of 200 before calculating.
How many questions does this calculator use for NBME 28?
The calculator treats NBME 28 as a 200-question self-assessment.
Should I trust NBME 28 more than older forms?
NBME 28 can be useful as a mid-to-late Step 1 readiness check, but consistency across multiple recent assessments matters more than one form.
What if my NBME 28 result is borderline?
Review weak areas, avoid deciding from one score, and confirm readiness with another recent NBME, Free 120, or school guidance.
Why is this separate from the Step 1 converter?
The Step 1 converter covers NBME 25-31 broadly. This page keeps Form 28 selected and answers Form 28-specific searches.
Does this replace my official NBME report?
No. Use the official NBME report and your school guidance as the primary sources.