NBME 16 Score Conversion for Step 2 CK
Form 16 is the newest CCSSA form NBME sells for Step 2 CK. Form 16 is preselected below: 75% correct is about 244.
Convert your Form 16 percent correct
Use the equated percent correct from your report, or count your own correct answers out of 200.
Your own percent correct. It can differ slightly from EPC, so the range is wider.
Estimated Step 2 CK score · NBME 16
244
Likely range 228–260
75% correct on NBME 16 estimates about 244 on the Step 2 CK scale.
- Passing standard (218)
- Whole range is above passing
- 2026 national percentile of 244
- 30th percentile
- Input used
- Self-counted percent · 75%
Independent NBMEcalc estimate built from two reference points in NBME's published sample CCSSA report. It is not an official NBME conversion. If your score report already shows a Total CCSSA Score, that number is NBME's own Step 2 CK estimate — use it directly.
Already have your Total CCSSA Score?
The three-digit score on your Form 16 report is NBME's own estimate of your Step 2 CK score. Enter it here to keep it as the midpoint and get a planning range, or add other practice tests for a combined estimate.
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Where Form 16 fits
Form 16 is the highest-numbered and newest form in NBME's current CCSSA set. Like every CCSSA it has 200 questions in four 50-question sections and reports a Total CCSSA Score on the same 1–300 scale as Step 2 CK.
NBME's estimated pass probability is modeled on examinees who tested within a week of Step 2 CK, so many students save their newest unused form for the final week. Form 16 is the usual choice for that slot. This is a planning habit, not an NBME rule.
NBME has been moving its self-assessments to an updated interface built to look more like the USMLE exams, with searchable lab values, a notes feature, and improved highlighting. It announced plans to bring that interface to the comprehensive self-assessments by the end of March 2026.
NBME 16 conversion chart: percent to Step 2 CK
NBME equates every CCSSA form, so the same equated percent maps to the same estimate on Form 16 as on any other form. The likely range adds model uncertainty on top of the ±8-point range NBME prints on its reports, so it is wider than the report's own range.
| Percent correct (EPC) | Estimated Step 2 CK | Likely range | 2026 percentile |
|---|---|---|---|
| 60% | 206 | 194–218 | <1st |
| 64% | 216 | 204–228 | 2nd |
| 68% | 226 | 214–238 | 7th |
| 70% | 231 | 219–243 | 10th |
| 72% | 236 | 224–248 | 17th |
| 74% | 241 | 229–253 | 25th |
| 76% | 246 | 234–258 | 34th |
| 78% | 252 | 239–265 | 50th |
| 80% | 257 | 243–271 | 63rd |
| 84% | 267 | 251–283 | 87th |
Passing is 218 for exams administered on or after July 1, 2025. See the full 50–90% chart and how the curve is built on the NBME score conversion page.
NBME 16 FAQs
Is NBME 16 harder than the other forms?+
It may feel harder, but that does not lower your converted score. NBME equates every CCSSA form, adjusting for small differences in difficulty, so the same equated percent correct leads to the same estimated Step 2 CK score on Form 16 as on Form 13 or 15.
Is NBME 16 predictive of Step 2 CK?+
As much as any CCSSA form. NBME describes the Total CCSSA Score as an estimate of your Step 2 CK score under the same knowledge and conditions, and a 52-study systematic review found CCSSA a good predictor of Step 2 CK. Taking it under real timing and close to test day keeps it most useful.
What percent do I need on NBME 16 to pass Step 2 CK?+
The converter puts the 218 passing score at about 65% equated percent correct. That is an estimate with a wide range; the pass probability printed on your Form 16 report is the better guide, because NBME models it from real Step 2 CK results.
What does 70% or 80% on NBME 16 convert to?+
About 231 for 70% and about 257 for 80% equated percent correct, each with a planning range. Use the converter above for your exact number.
When should I take NBME 16?+
Most students use it as their last comprehensive check in the final week, because it is the newest form and NBME's pass probability assumes testing within a week. If it disagrees sharply with your other recent results, take one more form before changing your test date.
NBME 16 or UWSA 2: which should I trust?+
Trust the NBME result first; it is NBME's own estimate of Step 2 CK. UWSA scores are widely reported to run higher than the real exam, which is why the Step 2 CK predictor subtracts an internal 2-point adjustment from UWSA 2. If both are close after that, your estimate is well supported.