NBME 31 Score CalculatorThe Most Current Step 1 Form — Best for Identifying Real Knowledge Gaps
200 questions · The most current Step 1 score calculator available. Enter your wrong answers to convert them to a predicted 3-digit score with the NBME 31 formula, and understand what your result reveals about your true exam readiness.
NBME 31 Is a Near-Neutral Predictor — No Large Adjustment Needed
Unlike UWSA forms (overpredict by 7–15 pts) and NBME 30 (underpredicts by ~3–5 pts), NBME 31 falls close to neutral with minimal prediction bias (community data: ±5–8 pts error). If you score 220 on NBME 31, your actual Step 1 result is likely to be in the 215–225 range.
Why NBME 31 Reveals Knowledge Gaps Better Than Older Forms
NBME 30 uses deliberate “noise” in vignettes to test psychological endurance — making it harder to distinguish a content gap from test fatigue. NBME 31 uses a cleaner vignette structure focused on applied clinical reasoning. Wrong answers on NBME 31 are more likely to reflect genuine knowledge deficits, not stem-reading difficulty. Categorizing your errors after NBME 31 is therefore more actionable than after any other active form.
You didn't know the underlying concept.
Review in UWorld or First Aid; flag the topic for re-testing before exam day.
You misread or misinterpreted the question stem.
Practice reading the final sentence of the stem first before the full vignette.
You confused two similar entities or conditions.
Build a side-by-side comparison table. Most pairs resolve in 30–60 min of review.
NBME 31 Score Benchmarks — What Your Wrong-Answer Count Means
| Wrong Answers | Predicted Score | Readiness Signal |
|---|---|---|
| 20 | ~249 | Exceptional |
| 30 | ~238 | Strong |
| 40 | ~227 | Above average |
| 50 | ~216 | Passing comfortably |
| 70+ | ~194 | Below threshold |
NBME 31 score formula: 270.48 − 1.08 × wrong answers. Passing threshold: 196.
NBME 29 / 30 / 31 / UWSA 2 — Difficulty & Timing Comparison
| NBME 29 | NBME 30 | NBME 31 | UWSA 2 | |
|---|---|---|---|---|
| Slope (pts/wrong) | 1.09 | 1.15 | 1.08 | 1.10 |
| Difficulty | Moderate | Hardest | Hard | Hard |
| Recommended timing | Week 6–7 | Final 1–2 wks | Final 1–2 wks | Final 5–7 days |
| Score bias | ~Neutral | Underpredicts | Minimal bias | Overpredicts +7 |
| Primary use | Readiness | Final checkpoint | Content check | Scheduling |
Community consensus data. Slope values from regression formulas calibrated against reported score pairs on r/step1 and SDN.
NBME 31 Score Conversion Table — Step 1
| Wrong | Correct | % Correct | Predicted Score | Pass Prob |
|---|---|---|---|---|
| 0 | 200 | 100% | 270 | 99.9% |
| 5 | 195 | 97.5% | 265 | 99.9% |
| 10 | 190 | 95% | 260 | 99.9% |
| 15 | 185 | 92.5% | 254 | 99.9% |
| 20 | 180 | 90% | 249 | 99.9% |
| 25 | 175 | 87.5% | 243 | 99.9% |
| 30 | 170 | 85% | 238 | 99.9% |
| 35 | 165 | 82.5% | 233 | 99.9% |
| 40 | 160 | 80% | 227 | 99.6% |
| 45 | 155 | 77.5% | 222 | 99.1% |
| 50 | 150 | 75% | 216 | 97.3% |
| 55 | 145 | 72.5% | 211 | 93.7% |
| 60 | 140 | 70% | 206 | 85.8% |
| 65 | 135 | 67.5% | 200 | 67.3% |
| 70 | 130 | 65% | 195 | 45.5% |
| 75 | 125 | 62.5% | 189 | 22.1% |
| 80 | 120 | 60% | 184 | 10.3% |
| 85 | 115 | 57.5% | 179 | 4.5% |
| 90 | 110 | 55% | 173 | 1.6% |
| 95 | 105 | 52.5% | 168 | 0.6% |
| 100 | 100 | 50% | 162 | 0.2% |
| 105 | 95 | 47.5% | 157 | 0.1% |
| 110 | 90 | 45% | 152 | 0.1% |
| 115 | 85 | 42.5% | 146 | 0.1% |
| 120 | 80 | 40% | 141 | 0.1% |
| 125 | 75 | 37.5% | 140 | 0.1% |
| 130 | 70 | 35% | 140 | 0.1% |
| 135 | 65 | 32.5% | 140 | 0.1% |
| 140 | 60 | 30% | 140 | 0.1% |
| 145 | 55 | 27.5% | 140 | 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 31
Newest Step 1 form (2025–2026) — reflects current exam style.
Newest available form. Best for simulating real test-day question style.
Other Step 1 Practice Exams
NBME 31 Step 1 Calculator — FAQ
This tool is for educational purposes only. Not affiliated with NBME® or USMLE®. Predictions carry an estimated error of ±5–8 points. No peer-reviewed study has published R² or bias data specific to NBME 31; accuracy figures reflect community consensus from r/step1 and SDN forums.