NBME 15 Score CalculatorThe 2026 Guideline Currency Test — Final Dedicated Checkpoint
200 questions · Final 2–3 weeks of dedicated study. Enter wrong answers to get your predicted 3-digit Step 2 CK score instantly. NBME 15 is the newest Step 2 CK form, featuring 2026 clinical guidelines and recent FDA approvals — the only active form that reflects current clinical reality.
NBME 15 Is Too New for Reliable Bias Data
NBME 15 was released in 2026 and has very limited community reporting. Unlike NBME 13 — where community data suggests ~3 pts overprediction — no reliable bias estimate exists for NBME 15 yet. Do not treat your NBME 15 predicted score as a definitive scheduling signal on its own. Cross-reference with NBME 13 or UWSA 2 before making your scheduling 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 15 Is Essential for 2026 Step 2 CK Candidates
NBME 15 is the only active Step 2 CK form calibrated to 2026 clinical content. It features questions reflecting updated clinical practice guidelines and recent FDA drug approvals — content that will appear on real 2026 Step 2 CK exams but is absent from older forms. If you are testing in 2026, NBME 15 serves a function no other form can: it exposes you to the specific clinical scenarios and management decisions that the current exam tests. NBME 13 and 14 remain more reliable predictors of score accuracy — but NBME 15 is the currency check.
NBME 15 uses the same long HPI-format question stems as NBME 14 and the real Step 2 CK exam: multi-paragraph patient histories requiring you to diagnose, reason through pathophysiology, and select the next best management step. What differs is the clinical content layer — guidelines current through 2026, more recently approved medications, and updated screening recommendations. Students who skip NBME 15 risk encountering unfamiliar content categories on exam day.
Content descriptions reflect project notes and general 2026 guideline update patterns. NBME does not publish form-specific content weightings. Community reports for NBME 15 are very limited at this time.
NBME 15 Score Benchmarks — What Your Score Means for Residency
NBME 15 bias direction is unknown — apply a buffer before comparing to specialty targets. Passing threshold: 218 (USMLE.org, effective July 1, 2025).
| Wrong Answers | Predicted Score | Specialty Signal |
|---|---|---|
| 15 | ~284 | Exceptional — competitive specialty territory |
| 25 | ~273 | Strong — well above competitive cutoff |
| 35 | ~262 | Good — above 240 competitive threshold |
| 50 | ~246 | Solid — within competitive specialty range |
| 60 | ~235 | Above safe zone (230+) — ready for most specialties |
| 70 | ~224 | Near safe zone — borderline for competitive programs |
| 75 | 218 | Exactly at passing threshold — borderline |
| 76+ | <218 | Below passing — do not schedule |
Formula: 300.50 − 1.10 × wrong answers. Specialty thresholds: 230+ safe zone, 240+ competitive (Surgery, Dermatology, Orthopaedics, Neurosurgery) — community consensus, not official NRMP data. 240+ ≈ 54 or fewer wrong answers (wrong=55 → exactly 240.00; wrong=54 → 241.10).
NBME 15 vs NBME 13 / 14 / UWSA 2 — Late Dedicated Comparison
| NBME 13 | NBME 14 | NBME 15 | UWSA 2 | |
|---|---|---|---|---|
| Slope (pts/wrong) | 1.07 | 1.08 | 1.10 ✦ | 1.08 |
| Intercept | 298.80 | 299.20 | 300.50 ✦ | 280.00 |
| Questions | 200 | 200 | 200 | 160 |
| Difficulty | Hard | Hard | Hard | Hardest |
| Recommended timing | Week 6 | Final 2–3 weeks | Final 2–3 weeks | Final 7–10 days |
| Avg. overprediction | ~3 pts | Limited data | Insufficient data | ~5 pts |
| Content vintage | Classic reasoning | 2025 guidelines | 2026 guidelines | UWorld-style |
| Primary use | Scheduling check | Guideline check | 2026 currency check | Final scheduling signal |
| Data source | Community | Community | Community (very limited) | Community |
✦ NBME 15 slope (1.10) is tied with NBME 10 for the highest among active Step 2 CK NBME forms. Its high intercept (300.50) largely offsets the steep slope at typical performance levels. Community consensus data; no peer-reviewed study exists for Step 2 CK practice assessment accuracy.
NBME 15 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% | 290 | 99.9% |
| 15 | 185 | 92.5% | 284 | 99.9% |
| 20 | 180 | 90% | 279 | 99.9% |
| 25 | 175 | 87.5% | 273 | 99.9% |
| 30 | 170 | 85% | 268 | 99.9% |
| 35 | 165 | 82.5% | 262 | 99.9% |
| 40 | 160 | 80% | 257 | 99.9% |
| 45 | 155 | 77.5% | 251 | 99.7% |
| 50 | 150 | 75% | 246 | 99.4% |
| 55 | 145 | 72.5% | 240 | 98.1% |
| 60 | 140 | 70% | 235 | 95.5% |
| 65 | 135 | 67.5% | 229 | 87.9% |
| 70 | 130 | 65% | 224 | 74.6% |
| 75 | 125 | 62.5% | 218 | 50% |
| 80 | 120 | 60% | 213 | 28.9% |
| 85 | 115 | 57.5% | 207 | 12.1% |
| 90 | 110 | 55% | 202 | 5.3% |
| 95 | 105 | 52.5% | 196 | 1.9% |
| 100 | 100 | 50% | 191 | 0.8% |
| 105 | 95 | 47.5% | 185 | 0.3% |
| 110 | 90 | 45% | 180 | 0.1% |
| 115 | 85 | 42.5% | 174 | 0.1% |
| 120 | 80 | 40% | 169 | 0.1% |
| 125 | 75 | 37.5% | 163 | 0.1% |
| 130 | 70 | 35% | 158 | 0.1% |
| 135 | 65 | 32.5% | 152 | 0.1% |
| 140 | 60 | 30% | 147 | 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 15
Newest Step 2 CK form (2026) — most current content.
Highest intercept among active forms. Features latest FDA approvals, 2026 guidelines. Best for students testing in 2026.
Other Step 2 CK Practice Exams
NBME 15 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 15 is a newly released form with very limited community data — no reliable bias or overprediction estimate exists at this time. Specialty score thresholds reflect community consensus from r/step2 and SDN, not official NRMP data. Passing threshold (218) per USMLE.org, effective July 1, 2025.