NBME 26 Score CalculatorThe Clinical Reasoning Step 1 Checkpoint — Immunology, Renal & Reproductive Diagnostic
200 questions · Week 3–4 mid-dedicated checkpoint. Enter wrong answers or percent correct to get your predicted 3-digit score instantly. NBME 26 is widely regarded as the most clinically integrated active Step 1 form — wrong answers here point to reasoning gaps, not memorization misses.
NBME 26 Slightly Overpredicts — Use a 2–4 Point Buffer for Scheduling
Community data suggests NBME 26 slightly overpredicts actual Step 1, though the exact magnitude is not quantified in any peer-reviewed study. As a conservative rule, subtract 2–4 pts before scheduling decisions. The Step 1 passing threshold is 196. Unlike NBME 28's well-documented +3–5 pt overprediction, NBME 26 bias data is community-consensus only.
Why NBME 26 Rewards Clinical Reasoning Over Rote Recall
NBME 26 questions predominantly use two-step clinical reasoning: vignette → identify pathophysiology → select mechanism or next step. Unlike NBME 25 (heavy on obscure biochemistry recall) or NBME 27 (Microbiology and Pharmacology rote memory), NBME 26 wrong answers almost always trace back to a clinical reasoning or pathophysiology integration gap — not a simple memorization miss. This makes it one of the most diagnostically honest forms in the dedicated sequence.
NBME 26 is the ideal form to take after completing your first UWorld pass — it measures exactly what UWorld trains. If your clinical reasoning is solid, NBME 26 will confirm it. If integration gaps remain, NBME 26 surfaces them directly before you move into the harder forms of the final stretch.
Your NBME 26 score − 2 to 4 pts = conservative scheduling estimate
Each wrong answer costs 1.152 pts on NBME 26 — slightly steeper than NBME 27 (1.11 pts/wrong) and marginally steeper than NBME 30 (1.15 pts/wrong), giving NBME 26 the highest scoring penalty of any active Step 1 form. The practical gap vs. NBME 30 is less than 0.003 pts/wrong (under 0.1 pt over 40 wrong answers).
What NBME 26 Tests More — and Less — Than Other Forms
Understanding NBME 26's content profile helps you prepare the right material before sitting the form and interpret your score correctly afterward.
Immunology, Renal Physiology & Reproductive Pathology
Immune deficiency mechanism identification, complement pathways, transplant rejection, hypersensitivity reactions. Nephrotic vs. nephritic syndromes, renal hemodynamics (afferent/efferent arteriole effects on GFR/RPF), acid-base. Ovarian/testicular masses, menstrual cycle hormone regulation, pregnancy physiology.
Rote Microbiology & Pharmacology recall
Organism ID, gram stain patterns, and antimicrobial pharmacology carry less weight than in NBME 27. Ambiguous long-stem vignettes with deliberate distractor noise — characteristic of NBME 28 and NBME 30 — are largely absent. Wrong answers here point to reasoning gaps, not memorization misses.
Content distribution reflects community observations, not official NBME documentation. Individual question sets vary.
NBME 26 Score Benchmarks — What Your Wrong-Answer Count Means
Subtract 2–4 pts from the predicted score for a conservative scheduling estimate.
| Wrong Answers | Predicted Score | Readiness Signal |
|---|---|---|
| 20 | ~259 | Exceptional — schedule with confidence |
| 30 | ~247 | Strong |
| 40 | ~235 | Above average |
| 50 | ~224 | Solid — verify with NBME 27 |
| 60 | ~212 | Near passing — targeted clinical reasoning review |
| 74 | ~196 | Right at passing threshold |
| 75+ | <196 | Below passing — do not schedule |
NBME 26 score formula: 281.56 − 1.152 × wrong answers. Passing threshold: 196.
NBME 25 / 26 / 27 / 28 — Difficulty & Timing Comparison
| NBME 25 | NBME 26 | NBME 27 | NBME 28 | |
|---|---|---|---|---|
| Slope (pts/wrong) | 1.113 | 1.152 | 1.11 | 1.048 |
| Difficulty | Easy | Moderate | Moderate | Easy |
| Recommended timing | Week 1–2 | Week 3–4 | Week 4–5 | Week 5–6 |
| Score bias | Underpredicts ~5–10 | Slight overpredict | Slight overpredict +2–4 | Overpredicts +3–5 |
| Primary use | Basic science baseline | Clinical reasoning check | Bugs & Drugs diagnostic | Confidence builder |
Community consensus data. Slope values from regression formulas calibrated against reported score pairs on r/step1 and SDN.
NBME 26 Score Conversion Table — Step 1
| Wrong | Correct | % Correct | Predicted Score | Pass Prob |
|---|---|---|---|---|
| 0 | 200 | 100% | 282 | 99.9% |
| 5 | 195 | 97.5% | 276 | 99.9% |
| 10 | 190 | 95% | 270 | 99.9% |
| 15 | 185 | 92.5% | 264 | 99.9% |
| 20 | 180 | 90% | 259 | 99.9% |
| 25 | 175 | 87.5% | 253 | 99.9% |
| 30 | 170 | 85% | 247 | 99.9% |
| 35 | 165 | 82.5% | 241 | 99.9% |
| 40 | 160 | 80% | 235 | 99.9% |
| 45 | 155 | 77.5% | 230 | 99.8% |
| 50 | 150 | 75% | 224 | 99.4% |
| 55 | 145 | 72.5% | 218 | 98.1% |
| 60 | 140 | 70% | 212 | 94.7% |
| 65 | 135 | 67.5% | 207 | 87.9% |
| 70 | 130 | 65% | 201 | 71.1% |
| 75 | 125 | 62.5% | 195 | 45.5% |
| 80 | 120 | 60% | 189 | 22.1% |
| 85 | 115 | 57.5% | 184 | 10.3% |
| 90 | 110 | 55% | 178 | 3.8% |
| 95 | 105 | 52.5% | 172 | 1.3% |
| 100 | 100 | 50% | 166 | 0.4% |
| 105 | 95 | 47.5% | 161 | 0.2% |
| 110 | 90 | 45% | 155 | 0.1% |
| 115 | 85 | 42.5% | 149 | 0.1% |
| 120 | 80 | 40% | 143 | 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 26
Accurate mid-dedicated period checkpoint.
Comparable difficulty to NBME 27. Emphasizes physiology and pharmacology.
Other Step 1 Practice Exams
NBME 26 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 form-specific bias or R² data for NBME 26; all accuracy figures and content emphasis observations reflect community consensus from r/step1 and SDN forums.