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Step 2 CK self-assessment estimator

NBME 9 Step 2 CK Score Calculator and CCSSA Form 9 Conversion

Wrong answers, percent correct, or a score you already hold: the NBME 9 Step 2 CK score calculator takes all three. Form 9 is the oldest of the seven CCSSA forms modelled here, and the only one where 75 misses falls below 218.

200 questionsPassing ≈ 218Runs in your browser

Not affiliated with, endorsed by, or sponsored by the NBME® or USMLE®. Educational estimates only.

Enter your result

Any way you have it — wrong answers, percent correct, or a score you were already given.

= 85.0% correct • 170 correct

Enter your result and press Calculate to see your estimated three-digit score, pass probability, and what the result means.

Quick take on this form

Form 9 is a straight line: 298.45 minus 1.09 for each of the 200 questions missed. Its interval is plus or minus nine, against six on Forms 10 to 13 and five on Forms 14 and 15. Its realistic exam range runs entirely upward. Read the NBME 9 Step 2 CK score calculator as a floor with a direction attached.

NBME 9 score reference

Estimated three-digit score and pass probability at each wrong-answer count for NBME 9 (CCSSA Form 9).

NBME 9 wrong answers to estimated score reference
WrongCorrect %Est. scorePass prob.
0100.0%29899%
597.5%29399%
1095.0%28899%
1592.5%28299%
2090.0%27799%
2587.5%27199%
3085.0%26699%
3582.5%26099%
4080.0%25599%
4577.5%24999%
5075.0%24499%
5572.5%23999%
6070.0%23395%
6567.5%22888%
7065.0%22269%
7562.5%21745%
8060.0%21120%
8557.5%2068%
9055.0%2003%
9552.5%1951%
10050.0%1891%
10547.5%1841%
11045.0%1791%
11542.5%1731%
12040.0%1681%
12537.5%1621%
13035.0%1571%
13532.5%1511%
14030.0%1461%
14527.5%1401%
15025.0%1351%
15522.5%1291%
16020.0%1241%
16517.5%1191%
17015.0%1131%
17512.5%1081%
18010.0%1021%
1857.5%971%
1905.0%911%
1952.5%861%
2000.0%801%

Estimates only. Rows step by five wrong answers; your exact result is calculated above.

How the NBME 9 Step 2 CK score calculator converts 200 questions

Arithmetic, not a lookup. The NBME 9 Step 2 CK score calculator takes 298.45 and subtracts 1.09 per miss.

Percent correct enters the same door: the NBME 9 Step 2 CK score calculator reads 65% as 70 misses and returns 222.

Feed 74 wrong in and the NBME 9 Step 2 CK score calculator returns 218 exactly, the passing standard, at 63% correct.

One more miss and the NBME 9 Step 2 CK score calculator drops to 217. No sibling form falls below 218 at 75.

Hold a three-digit score already? The NBME 9 Step 2 CK score calculator runs the line backwards to the misses behind it.

Nothing else feeds the NBME 9 Step 2 CK score calculator: not the clerkship, not your timing, not what you flagged.

NBME 9 conversion chart: wrong answers to a three-digit score

Twenty wrong converts to 277 on the NBME 9 Step 2 CK score calculator, 40 wrong to 255, 50 wrong to 244.

At 60 misses the NBME 9 Step 2 CK score calculator returns 233. At 70, it returns 222. At 80, 211.

Ninety wrong is 200, and at 100, half the paper, the NBME 9 Step 2 CK score calculator reports 189.

Backwards is the useful direction in preparation, and the NBME 9 Step 2 CK score calculator runs it.

A 230 needs 63 or fewer misses on the NBME 9 Step 2 CK score calculator, a 240 needs 54, a 250 needs 44.

Ten points costs nine or ten questions, which turns the NBME 9 Step 2 CK score calculator into a study planner.

A slope of 1.09 makes the NBME 9 Step 2 CK score calculator skip roughly one value in twelve.

Output steps from 215 to 213, so the NBME 9 Step 2 CK score calculator never reports 214, 226 or 238.

How accurate the NBME 9 Step 2 CK score calculator is against 218

A good NBME 9 predicted score is one whose whole band clears the line, and the NBME 9 Step 2 CK score calculator prints that band.

Converted 218 spans 209 to 227 on the NBME 9 Step 2 CK score calculator, which fits a comfortable pass and a fail.

So 218 from the NBME 9 Step 2 CK score calculator is not a passing result. It is an unresolved one.

Converted 230 spans 221 to 239 and resolves. Above the mid-220s the NBME 9 Step 2 CK score calculator starts answering.

The coefficients behind the NBME 9 Step 2 CK score calculator come from publicly circulated data, not from the exam makers.

Widening a band is what you do when you know less, and the NBME 9 Step 2 CK score calculator does. Read the method note.

The NBME 9 Step 2 CK score calculator reports pass probability from a logistic curve, not the step table five siblings use.

So the NBME 9 Step 2 CK score calculator shows about 60% at a converted 220, where Form 12 shows about 88%.

Treat that percentage as a rough band. The NBME 9 Step 2 CK score calculator knows nothing about you personally.

For competitiveness rather than passing, the NBME 9 Step 2 CK score calculator is the wrong instrument: 240 and 250 overlap.

When to take NBME 9, and running the sums by hand

Most people reach the NBME 9 Step 2 CK score calculator early, during clerkships or the first days of dedicated study.

The upward correction fits that: the NBME 9 Step 2 CK score calculator expects real performance at or above the converted number.

By up to twenty points, which makes a weak NBME 9 Step 2 CK score calculator reading a flimsy reason to move an exam date.

What justifies a move is a pattern, not one NBME 9 Step 2 CK score calculator run: two flat forms a week apart, or a gap to 218 too big to close.

Take the second reading on a fresh paper rather than re-running the NBME 9 Step 2 CK score calculator. The next Step 2 CK form is the usual choice.

Or schedule the remaining forms so the NBME 9 Step 2 CK score calculator is not reading two papers from one week.

No paid score report is needed. Kept a tally of what you missed? The NBME 9 Step 2 CK score calculator takes it from there.

Enter that count and the NBME 9 Step 2 CK score calculator returns exactly what the percentage route would have.

What the NBME 9 Step 2 CK score calculator cannot see is how you sat the paper.

Untimed, split across two evenings, or with a lab-values sheet open, and the NBME 9 Step 2 CK score calculator is describing a different exam.

Content sampling, fatigue and single-test variance are invisible to the NBME 9 Step 2 CK score calculator as well.

The NBME 9 Step 2 CK score calculator is not affiliated with, endorsed by, or sponsored by the NBME or the USMLE program. Read all seven Step 2 CK coefficients.

Frequently asked questions

Straight answers about what this estimate can and cannot tell you.

How many wrong answers is a passing score on NBME 9?

Seventy-four wrong out of 200 is where the NBME 9 Step 2 CK score calculator returns 218, the Step 2 CK passing standard, at 63% correct.

Seventy-five wrong drops to 217. Form 9 is the only one of the seven CCSSA forms that the NBME 9 Step 2 CK score calculator puts below the line at 75.

Does the NBME 9 Step 2 CK score calculator underestimate the exam?

The model treats it that way. The NBME 9 Step 2 CK score calculator carries a realistic range from the converted score to twenty points above it.

Forms 10 to 13 use five to twelve. The NBME 9 Step 2 CK score calculator is describing a population of test-takers, not you.

Why is the NBME 9 predicted score range wider than newer forms?

Because the data behind the NBME 9 Step 2 CK score calculator is older and thinner than the data behind Forms 14 and 15.

The NBME 9 Step 2 CK score calculator uses a plus-or-minus nine interval where Forms 10 to 13 use six and Forms 14 and 15 use five.

Can the NBME 9 Step 2 CK score calculator work offline from misses?

Yes. The NBME 9 Step 2 CK score calculator needs nothing but how many of the 200 questions you missed, so your own tally is enough.

Percent correct returns the same estimate, and a three-digit score run through the NBME 9 Step 2 CK score calculator recovers the misses behind it.

When should the NBME 9 Step 2 CK score calculator be used in prep?

Early, as a baseline. The NBME 9 Step 2 CK score calculator is reading a full 200-question paper, so it exposes weak clerkship subjects reliably.

It is a poor final readiness check. The band behind the NBME 9 Step 2 CK score calculator is twice as wide as the band on Forms 14 and 15.

Is a low NBME 9 Step 2 CK score calculator result a reason to delay?

Rarely on its own. One NBME 9 Step 2 CK score calculator reading, with a nine-point interval and a twenty-point upward correction, is not evidence enough.

Sit a second form a week later. A flat trend across the pair, not one NBME 9 Step 2 CK score calculator reading, is the signal worth acting on.

Cross-check this estimate against another form, or read how the models are built.

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Send it to a study partner sitting the same form, or print a copy once you have run your numbers.

Seventy-four wrong is the 218 line on Form 9, and the NBME 9 Step 2 CK score calculator is free.

Not affiliated with, endorsed by, or sponsored by the NBME® or USMLE®. Educational estimates only.