Step 2 CK score percentile calculator
The latest USMLE Score Interpretation Guidelines, updated April 29, 2026, use first-takers from LCME-accredited medical schools who tested from July 2022 through June 2025 (N=67,934).
Enter a whole-number score from 100 to 300.
Official ranks are published every 5 points. Scores between those anchors are estimated with linear interpolation.
| Score | Percentile |
|---|---|
| 300 | >99th |
| 295 | >99th |
| 290 | >99th |
| 285 | >99th |
| 280 | >99th |
| 275 | 98th |
| 270 | 94th |
| 265 | 85th |
| 260 | 74th |
| 255 | 60th |
| 250 | 47th |
| 245 | 34th |
| 240 | 24th |
| 235 | 16th |
| 230 | 10th |
| 225 | 6th |
| 220 | 4th |
| 215 | 2nd |
| 210 | 1st |
| 205 | 1st |
| 200 | <1st |
| 195 | <1st |
| 190 | <1st |
| 185 | <1st |
| 180 | <1st |
| 175 | <1st |
| 170 | <1st |
| 165 | <1st |
| 160 | <1st |
| 155 and below | <1st |
A percentile is the percentage of this reference group that scored lower. The official extreme values of 0 and 100 are shown here as <1st and >99th. The full predictor shows the corresponding estimate for your predicted score.
Common questions
Is 250 a good Step 2 CK score?
In the latest official USMLE reference group, 250 is the 47th percentile. 260 is the 74th, and 270 is the 94th.
What is the average Step 2 CK score?
The USMLE Score Interpretation Guidelines report a mean of 250 with a standard deviation of 15 for LCME-accredited first-takers in the 2024–2025 academic year.
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