NBME 10 Score CalculatorStep 2 CK Score Conversion · Week 3–4 Clinical Reasoning Benchmark
200 questions · Week 3–4 of dedicated study. Enter wrong answers to get your predicted 3-digit NBME 10 Step 2 CK score and score conversion instantly. NBME 10 is widely regarded as the fairest and most logically sound Step 2 CK form ever written — a pure clinical reasoning benchmark that mirrors the real exam's question style without obscure trivia or outdated content.
NBME 10 Tends to Underpredict — Your Real Score May Be Higher
Community data (r/step2, SDN, yousmle.com) consistently shows that most students score at or above their NBME 10 predicted score on the real Step 2 CK exam. No established average underprediction magnitude exists for NBME 10 specifically — treat the underprediction as directional, not quantified. The current Step 2 CK passing threshold is 218 (effective July 1, 2025). Do not use NBME 10 as a scheduling signal — use NBME 13 or UWSA 2 for that decision. No peer-reviewed predictive accuracy study exists for any Step 2 CK practice assessment (unlike Step 1's Seal et al. 2020, Cureus, PMC7198101).
Why NBME 10 Is the Step 2 CK Clinical Reasoning Standard
NBME 10 is consistently described by the medical student community as the fairest and most logically sound Step 2 CK form ever written. Unlike NBME 9 — which contains outdated diagnostic trivia and vague question stems that do not reflect the modern exam — NBME 10 is built almost entirely around clinical reasoning: Next Best Step in Management, Most Likely Diagnosis, and patient safety scenarios that closely mirror the logic of UWorld and the real exam. Every question has a clear, defensible correct answer. Students who struggle on NBME 10 are identifying genuine gaps in clinical reasoning, not encountering artifacts of outdated content.
This content clarity makes NBME 10 the ideal Week 3–4 benchmark. At this stage, your core question bank work is underway but not complete, and you still have time to address the gaps NBME 10 identifies. Unlike NBME 9 — whose scores are suppressed by archaic content and are best treated as a raw gap-identification tool rather than a score predictor — NBME 10 gives you a meaningful number. Students commonly score 15–20 points higher on NBME 10 than on NBME 9 taken one to two weeks earlier, primarily because NBME 10's content reflects the modern exam and NBME 9's does not.
Clinical reasoning characterization and community reputation reflect scoreData project notes and consensus from yousmle.com, thematchguy.com, and medboardtutors.com. Underprediction tendency reflects general NBME community data (77% score ≥ predicted); no NBME 10–specific underprediction study has been published.
NBME 10 Score Benchmarks — Step 2 CK
| Wrong Answers | Predicted Score | Signal |
|---|---|---|
| 15 | ~284 | Exceptional — competitive specialty territory |
| 25 | ~273 | Strong — well above competitive cutoff |
| 35 | ~262 | Good — above 240 competitive threshold |
| 50 | ~245 | Solid — within competitive specialty range |
| 60 | ~234 | Above safe zone (230+) — ready for most specialties |
| 70 | ~223 | Near safe zone — borderline for competitive programs |
| 74 | ~219 | Above passing threshold — borderline |
| 75 | ~218 | At passing threshold — borderline |
| 76+ | <218 | Below passing — do not schedule |
Formula: 300.18 − 1.10 × wrong answers. Passing threshold: 218 (USMLE.org, effective July 1, 2025).
240+ competitive threshold corresponds to 54 or fewer wrong answers (wrong=54 → 240.78 → ~241; wrong=55 → 239.68 → ~240, borderline). Specialty thresholds (230+/240+) reflect community consensus — not official NRMP data. NBME 10 tends to underpredict — actual score may exceed predicted.
NBME 10 vs Adjacent Forms — Step 2 CK Early-to-Mid Dedicated Progression
| NBME 9 | NBME 10 | NBME 11 | NBME 12 | |
|---|---|---|---|---|
| Slope (pts/wrong) | 1.09 | 1.10 | 1.08 | 1.09 |
| Intercept | 298.45 | 300.18 | 299.50 | 300.18 |
| Questions | 200 | 200 | 200 | 200 |
| Difficulty | Hard | Moderate | Moderate | Moderate |
| Recommended timing | Week 1–2 | Week 3–4 | Week 4–5 | Week 5–6 |
| Prediction bias | Underpredicts significantly | Leans to underpredict | ~3–5 pts over (limited) | Direction unclear |
| Content style | Outdated trivia | Clinical reasoning | Clinical + first QI | Clinical reasoning |
| Primary use | Baseline diagnostic | Week 3–4 benchmark | Mid-dedicated + QI | Late mid benchmark |
| Data source | Community | Community | Community (limited) | Community (limited) |
Community consensus data. NBME 9 contains outdated diagnostic content — treat its predicted score as a rough baseline only, not a predictive signal.
At 60 wrong answers: NBME 9 → ~233, NBME 10 → ~234, NBME 11 → ~235, NBME 12 → ~235. (NBME 9: 298.45−1.09×60=233.05→~233; NBME 10: 300.18−1.10×60=234.18→~234)
NBME 10 Score Conversion Table — Step 2 CK
| Wrong | Correct | % Correct | Predicted Score | Pass Prob |
|---|---|---|---|---|
| 0 | 200 | 100% | 300 | 99.9% |
| 5 | 195 | 97.5% | 295 | 99.9% |
| 10 | 190 | 95% | 289 | 99.9% |
| 15 | 185 | 92.5% | 284 | 99.9% |
| 20 | 180 | 90% | 278 | 99.9% |
| 25 | 175 | 87.5% | 273 | 99.9% |
| 30 | 170 | 85% | 267 | 99.9% |
| 35 | 165 | 82.5% | 262 | 99.9% |
| 40 | 160 | 80% | 256 | 99.9% |
| 45 | 155 | 77.5% | 251 | 99.7% |
| 50 | 150 | 75% | 245 | 99.2% |
| 55 | 145 | 72.5% | 240 | 98.1% |
| 60 | 140 | 70% | 234 | 94.7% |
| 65 | 135 | 67.5% | 229 | 87.9% |
| 70 | 130 | 65% | 223 | 71.1% |
| 75 | 125 | 62.5% | 218 | 50% |
| 80 | 120 | 60% | 212 | 25.4% |
| 85 | 115 | 57.5% | 207 | 12.1% |
| 90 | 110 | 55% | 201 | 4.5% |
| 95 | 105 | 52.5% | 196 | 1.9% |
| 100 | 100 | 50% | 190 | 0.6% |
| 105 | 95 | 47.5% | 185 | 0.3% |
| 110 | 90 | 45% | 179 | 0.1% |
| 115 | 85 | 42.5% | 174 | 0.1% |
| 120 | 80 | 40% | 168 | 0.1% |
| 125 | 75 | 37.5% | 163 | 0.1% |
| 130 | 70 | 35% | 157 | 0.1% |
| 135 | 65 | 32.5% | 152 | 0.1% |
| 140 | 60 | 30% | 146 | 0.1% |
| 145 | 55 | 27.5% | 141 | 0.1% |
| 150 | 50 | 25% | 140 | 0.1% |
| 155 | 45 | 22.5% | 140 | 0.1% |
| 160 | 40 | 20% | 140 | 0.1% |
| 165 | 35 | 17.5% | 140 | 0.1% |
| 170 | 30 | 15% | 140 | 0.1% |
| 175 | 25 | 12.5% | 140 | 0.1% |
| 180 | 20 | 10% | 140 | 0.1% |
| 185 | 15 | 7.5% | 140 | 0.1% |
| 190 | 10 | 5% | 140 | 0.1% |
| 195 | 5 | 2.5% | 140 | 0.1% |
| 200 | 0 | 0% | 140 | 0.1% |
About NBME 10
One of the most logically sound Step 2 CK forms.
Considered the fairest Step 2 CK form ever written. Great for assessing clinical reasoning.
Other Step 2 CK Practice Exams
NBME 10 Step 2 CK Calculator — FAQ
This tool is for educational purposes only. Not affiliated with NBME® or USMLE®. Predictions carry an estimated error of ±5–10 points. NBME 10 tends to underpredict — treat the predicted score as a floor, not a ceiling. Specialty score thresholds (230+/240+) reflect community consensus, not official NRMP data. Passing threshold (218) per USMLE.org, effective July 1, 2025.