Skip to main content
Step 2 CK self-assessment estimator

NBME 10 Step 2 CK Score Calculator for CCSSA Form 10

Give the NBME 10 Step 2 CK score calculator a miss count, a percent correct, or a score you already hold. Form 10 starts higher than every form except 15 and takes more off per miss than most, so its top end is the part worth understanding.

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

The NBME 10 Step 2 CK score calculator runs 300.18 minus 1.10 points per miss across 200 questions. That intercept is beaten only by Form 15, and the slope is the joint-steepest in the pool, so the curve is generous at the top and unforgiving in the middle. Interval plus or minus six; realistic exam range five to twelve points above the estimate.

NBME 10 score reference

Estimated three-digit score and pass probability at each wrong-answer count for NBME 10 (CCSSA Form 10).

NBME 10 wrong answers to estimated score reference
WrongCorrect %Est. scorePass prob.
0100.0%30099%
597.5%29599%
1095.0%28999%
1592.5%28499%
2090.0%27899%
2587.5%27399%
3085.0%26799%
3582.5%26299%
4080.0%25699%
4577.5%25199%
5075.0%24599%
5572.5%24099%
6070.0%23495%
6567.5%22988%
7065.0%22388%
7562.5%21875%
8060.0%21260%
8557.5%20745%
9055.0%20130%
9552.5%19615%
10050.0%19015%
10547.5%18515%
11045.0%17915%
11542.5%17415%
12040.0%16815%
12537.5%16315%
13035.0%15715%
13532.5%15215%
14030.0%14615%
14527.5%14115%
15025.0%13515%
15522.5%13015%
16020.0%12415%
16517.5%11915%
17015.0%11315%
17512.5%10815%
18010.0%10215%
1857.5%9715%
1905.0%9115%
1952.5%8615%
2000.0%8015%

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

How the NBME 10 Step 2 CK score calculator builds a score from misses

Start at 300.18. The NBME 10 Step 2 CK score calculator subtracts 1.10 for every question missed, then rounds.

Percent correct is the same input in other clothes: the NBME 10 Step 2 CK score calculator reads 70% as 60 misses and returns 234.

Feed 75 wrong in and the NBME 10 Step 2 CK score calculator lands on 218 exactly, the passing standard, at 62.5% correct.

One more miss and the NBME 10 Step 2 CK score calculator returns 217. The line is that flat near the boundary.

Hold a three-digit score already? The NBME 10 Step 2 CK score calculator runs backwards to the miss count behind it.

Nothing else counts. The NBME 10 Step 2 CK score calculator never sees which clerkship a miss came from, or how long you took.

NBME 10 conversion chart: wrong answers to a three-digit score

Ten wrong converts to 289 on the NBME 10 Step 2 CK score calculator, 20 wrong to 278, 30 wrong to 267.

At 40 misses the NBME 10 Step 2 CK score calculator returns 256. At 50, it returns 245. At 60, 234.

Seventy wrong is 223 and 75 wrong sits on 218. Beyond that the NBME 10 Step 2 CK score calculator gives 212 at 80, 201 at 90, 190 at 100.

Backwards is the direction that helps during study, and the NBME 10 Step 2 CK score calculator runs it.

A 230 needs 64 or fewer misses on the NBME 10 Step 2 CK score calculator, a 240 needs 55, a 250 needs 46.

Each ten-point target costs nine or ten questions on the NBME 10 Step 2 CK score calculator, roughly one productive week of review.

A slope of 1.10 makes the NBME 10 Step 2 CK score calculator skip about one value in eleven.

Output steps from 217 to 215, so the NBME 10 Step 2 CK score calculator never reports 216, 227 or 238.

How accurate the NBME 10 Step 2 CK score calculator is at the top

Below about 270 the honest answer is the stated band: the NBME 10 Step 2 CK score calculator gives plus or minus six points.

The modelled exam range sits five to twelve points higher. Near the ceiling the NBME 10 Step 2 CK score calculator changes shape.

A perfect paper returns 300 and a five-miss paper returns 295, yet the NBME 10 Step 2 CK score calculator clamps both exam ranges to 300.

Two different performances share one NBME 10 Step 2 CK score calculator reading. That is the scale running out, not the arithmetic failing.

Score reports stop at 300, so the NBME 10 Step 2 CK score calculator stops resolving before the questions do.

If your result sits up there, the NBME 10 Step 2 CK score calculator can no longer tell you anything more precise. Read how the constants were fitted.

A good NBME 10 predicted score starts around 225, where the NBME 10 Step 2 CK score calculator puts the whole band clear of 218.

At a converted 220 the NBME 10 Step 2 CK score calculator reaches down to 214, which is reassuring and unresolved at the same time.

Above passing, this form compresses. The NBME 10 Step 2 CK score calculator puts nine questions between 250 and 260, and nine again between 280 and 290.

Only one of those gaps matters to a residency application, so the NBME 10 Step 2 CK score calculator is the wrong ruler for it.

When to sit NBME 10, and converting it without the tool

The NBME 10 Step 2 CK score calculator works best mid-sequence: late enough that a weak result informs you, early enough to act.

Its six-point band is tighter than Form 9 and wider than the last two forms, so the NBME 10 Step 2 CK score calculator is a checkpoint rather than a verdict.

Is a change between two sittings real? Read the second one against the NBME 10 Step 2 CK score calculator curve you already know.

The form with the same starting point shares this intercept, so a gap against the NBME 10 Step 2 CK score calculator is almost entirely you.

The next Step 2 CK form continues the sequence. Compare the seven curves before you spend one.

No paid score report is needed. Kept a tally of what you missed? The NBME 10 Step 2 CK score calculator takes it from there.

Type the count in and the NBME 10 Step 2 CK score calculator answers the same as the percentage route.

What the NBME 10 Step 2 CK score calculator cannot see is the conditions of the sitting.

Untimed, split across two days, or with reference material open, and the NBME 10 Step 2 CK score calculator is describing a different exam.

Content sampling and ordinary test-day variance are invisible to the NBME 10 Step 2 CK score calculator as well.

The NBME 10 Step 2 CK score calculator is not affiliated with, endorsed by, or sponsored by the NBME or the USMLE program.

Frequently asked questions

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

How many misses still pass on the NBME 10 Step 2 CK score calculator?

Seventy-five wrong out of 200 is where the NBME 10 Step 2 CK score calculator returns 218, the Step 2 CK passing standard, at 62.5% correct.

Seventy-six wrong returns 217. The NBME 10 Step 2 CK score calculator only clears 218 with its whole band from about 225 upward.

Why does the NBME 10 Step 2 CK score calculator cap at 300?

Because the reported scale stops there. The NBME 10 Step 2 CK score calculator starts at 300.18, so a perfect paper rounds to 300.

Anyone missing five or fewer questions gets that same top-end reading from the NBME 10 Step 2 CK score calculator. The scale ran out, not the arithmetic.

What percent correct is a 240 on the NBME 10 Step 2 CK score calculator?

About 72.5%, which is 55 wrong out of 200 on the NBME 10 Step 2 CK score calculator. A 230 needs roughly 68% correct, or 64 misses.

A 250 needs about 77%, or 46 misses. Ten points costs nine or ten questions on the NBME 10 Step 2 CK score calculator.

Can the NBME 10 Step 2 CK score calculator work offline from misses?

Yes. The NBME 10 Step 2 CK score calculator needs the miss count and nothing else, so a tally from your own answer sheet is enough.

Percent correct produces the same estimate through the same line, and entering a three-digit score runs the NBME 10 Step 2 CK score calculator backwards.

Is the NBME 10 Step 2 CK score calculator harder than newer forms?

The NBME 10 Step 2 CK score calculator is stricter in the middle and kinder at the top, but the differences are small.

At 70 misses the NBME 10 Step 2 CK score calculator returns 223 while Forms 11 through 15 return 224. One or two points between forms is not worth interpreting; ten or more is.

When should the NBME 10 Step 2 CK score calculator be used in prep?

Somewhere in the middle of the sequence, with at least a week of study on either side of the NBME 10 Step 2 CK score calculator reading.

The NBME 10 Step 2 CK score calculator is tight enough to inform and early enough to act on. Seven to ten days between forms keeps readings independent.

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

Share this calculator

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

Seventy-five wrong still reads 218 here, and the NBME 10 Step 2 CK score calculator needs no account.

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