NBME 29 Score CalculatorThe Most Balanced Step 1 Form — Your True Readiness Check
200 questions · The fairest active Step 1 score calculator available. Enter your wrong answers to convert them to a predicted 3-digit score with the NBME 29 formula, and understand what your result reveals about real exam readiness.
NBME 29 Slightly Underpredicts — Your Real Score Is Likely 1–3 Points Higher
NBME 29 is the most neutral predictor among active forms. Community data consistently shows it underpredicts actual Step 1 by ~1–3 points — far less distortion than NBME 28 (overpredicts +3–5 pts) or UWSA forms (+7–15 pts). If you score 220 on NBME 29 two weeks before your exam, expect your real Step 1 in the 220–225 range.
NBME 29's Hidden Score Lever: Biostatistics & Ethics
NBME 29 carries a notably higher proportion of Biostatistics/Epidemiology and Ethics/Communication questions than other active Step 1 forms. Students who haven't specifically reviewed these areas often drop 5–6 points they didn't need to lose — points recoverable in under an hour of targeted prep.
Questions focus on numerical calculations — sensitivity, specificity, PPV, NNT — not conceptual definitions.
Review: Randy Neil biostats videos (15–20 min). Expected return: 3–4 extra points.
Questions test frameworks — patient autonomy, informed consent, breaking bad news — not memorized facts.
Review: Dirty Medicine ethics (30 min). Expected return: 2–3 extra points.
Spending 45–60 minutes on these two areas before sitting NBME 29 typically yields more points per hour than any equivalent content review.
NBME 29 Score Benchmarks — What Your Wrong-Answer Count Means
| Wrong Answers | Predicted Score | Readiness Signal |
|---|---|---|
| 25 | ~245 | Exceptional — schedule with confidence |
| 33 | ~236 | Strong — on track |
| 40 | ~229 | Above average — solid position |
| 50 | ~218 | Passing comfortably |
| 60 | ~207 | Thin pass — targeted review needed |
| 70 | ~196 | Right at passing threshold |
| 75+ | ~190 | Below passing — consider extending dedicated period |
NBME 29 score formula: 272.18 − 1.09 × wrong answers. Passing threshold: 196. A score below 210 at 2 weeks out is an actionable warning with time to close gaps.
NBME 28 / 29 / 30 / 31 — Difficulty & Timing Comparison
| NBME 28 | NBME 29 | NBME 30 | NBME 31 | |
|---|---|---|---|---|
| Slope (pts/wrong) | 1.048 | 1.09 | 1.15 | 1.08 |
| Difficulty | Easy | Moderate | Hardest | Hard |
| Recommended timing | Week 5–6 | Week 6–7 | Final 1–2 wks | Final 1–2 wks |
| Score bias | Overpredicts +3 | Underpredicts ~2 | Underpredicts ~4 | Minimal |
| Primary use | Confidence | Readiness check | Final checkpoint | Content check |
Community consensus data. Slope values from regression formulas calibrated against reported score pairs on r/step1 and SDN.
NBME 29 Score Conversion Table — Step 1
| Wrong | Correct | % Correct | Predicted Score | Pass Prob |
|---|---|---|---|---|
| 0 | 200 | 100% | 272 | 99.9% |
| 5 | 195 | 97.5% | 267 | 99.9% |
| 10 | 190 | 95% | 261 | 99.9% |
| 15 | 185 | 92.5% | 256 | 99.9% |
| 20 | 180 | 90% | 250 | 99.9% |
| 25 | 175 | 87.5% | 245 | 99.9% |
| 30 | 170 | 85% | 239 | 99.9% |
| 35 | 165 | 82.5% | 234 | 99.9% |
| 40 | 160 | 80% | 229 | 99.7% |
| 45 | 155 | 77.5% | 223 | 99.2% |
| 50 | 150 | 75% | 218 | 98.1% |
| 55 | 145 | 72.5% | 212 | 94.7% |
| 60 | 140 | 70% | 207 | 87.9% |
| 65 | 135 | 67.5% | 201 | 71.1% |
| 70 | 130 | 65% | 196 | 50% |
| 75 | 125 | 62.5% | 190 | 25.4% |
| 80 | 120 | 60% | 185 | 12.1% |
| 85 | 115 | 57.5% | 180 | 5.3% |
| 90 | 110 | 55% | 174 | 1.9% |
| 95 | 105 | 52.5% | 169 | 0.8% |
| 100 | 100 | 50% | 163 | 0.3% |
| 105 | 95 | 47.5% | 158 | 0.1% |
| 110 | 90 | 45% | 152 | 0.1% |
| 115 | 85 | 42.5% | 147 | 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 29
Reliable late-stage readiness assessment.
Moderate difficulty. Historical data shows NBME 29 may underestimate actual score by ~5–8 pts.
Other Step 1 Practice Exams
NBME 29 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 29; accuracy figures reflect community consensus from r/step1 and SDN forums.