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Step 2 CK self-assessment estimator

Free 120 Step 2 Score Calculator for the Official Sample

About 67 percent correct lands on 218. This Free 120 Step 2 score calculator takes a percentage, a wrong count, or a score you already hold.

120 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 • 102 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 Free 120 is the official free Step 2 CK sample: 120 released sample test questions, and no three-digit score is ever reported for them. The Free 120 Step 2 score calculator runs one straight line, 1.7 points per percentage point plus 104, so 67 percent reads 218 and a flawless sitting tops out at 274.

Free 120 score reference

Estimated three-digit score and pass probability at each wrong-answer count for Free 120 (Step 2 CK).

Free 120 wrong answers to estimated score reference
WrongCorrect %Est. scorePass prob.
0100.0%27497%
595.8%26797%
1091.7%26097%
1587.5%25394%
2083.3%24690%
2579.2%23984%
3075.0%23275%
3570.8%22462%
4066.7%21748%
4562.5%21035%
5058.3%20323%
5554.2%19615%
6050.0%1899%
6545.8%1825%
7041.7%1753%
7537.5%1683%
8033.3%1613%
8529.2%1543%
9025.0%1473%
9520.8%1393%
10016.7%1323%
10512.5%1253%
1108.3%1183%
1154.2%1113%
1200.0%1043%

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

How the Free 120 Step 2 score calculator converts percent correct

Enter your percent correct. The Free 120 Step 2 score calculator multiplies it by 1.7 and adds 104.

Kept a wrong count instead? The Free 120 Step 2 score calculator derives the percentage from 120 questions.

Hold a three-digit number? Typed in, the Free 120 Step 2 score calculator reverses the line back to a percentage.

No score report exists to upload. The sample returns a percentage, and the Free 120 Step 2 score calculator needs nothing else.

One item is 0.83 percentage points, so every question moves the Free 120 Step 2 score calculator about 1.4 points.

That is the coarsest step here, and the Free 120 Step 2 score calculator cannot resolve finer.

Thirty-nine wrong reads 219, forty reads 217, and the Free 120 Step 2 score calculator has nothing in between.

Free 120 Step 2 conversion chart: percent correct to a three-digit score

Anchors: 0 wrong reads 274, 12 reads 257, 24 reads 240, 39 reads 219, 60 reads 189. The Free 120 Step 2 score calculator fills the rest in.

The ceiling is 274, not 300, so a flawless sample is not a flawless exam on the Free 120 Step 2 score calculator.

Spacing is even the whole way down: the Free 120 Step 2 score calculator has no forgiving stretch and no cliff.

Pass probability moves far slower than the score: the Free 120 Step 2 score calculator reads 85 percent at 240 and 52 at 219.

That curve is the flattest here, and the Free 120 Step 2 score calculator never leaves the 3 to 97 percent band.

Eighty percent correct is 24 wrong and reads 240 on the Free 120 Step 2 score calculator.

Fifty percent is 60 wrong and reads 189, where the Free 120 Step 2 score calculator stops being a close call.

Set it against the assessment form from the same fortnight, which samples more of the blueprint than 120 items can.

What a good result looks like against 218

About 67 percent correct converts to 218, the passing standard every Free 120 Step 2 score calculator band is drawn from.

Sixty percent reads 206, and 28 percent likely to pass on the Free 120 Step 2 score calculator.

Eighty percent reads 240 at 85 percent likely, so the Free 120 Step 2 score calculator puts real distance between them.

Step 2 CK is scored, not pass-fail, so good on the Free 120 Step 2 score calculator is a distance above 218.

A low-220s reading leaves almost no cushion on the Free 120 Step 2 score calculator, and test-day variation is wider.

Mid-preparation, a Free 120 Step 2 score calculator result in the 240s does what a checkpoint should.

Read the gap to 218 as margin you can afford to lose, not as a promise from the Free 120 Step 2 score calculator.

How accurate the Free 120 Step 2 score calculator is, and which set you sat

The USMLE program reports percent correct on its free sample test questions and publishes no conversion the Free 120 Step 2 score calculator could use.

No official percent-to-three-digit table exists, so every Free 120 Step 2 score calculator on the web is a fitted model.

When two disagree, neither is authoritative, and the gap measures the slack in every Free 120 Step 2 score calculator.

Some pages say the exam runs above the sample, others that released items make it easier. This Free 120 Step 2 score calculator applies neither.

How these models are built sets out the assumptions behind the Free 120 Step 2 score calculator.

The sample is refreshed from time to time, and Free 120 Step 2 score calculator tables fitted to an older release keep circulating.

One line covers whichever 120 questions you sat, so the Free 120 Step 2 score calculator never asks which download you hold.

Sit it timed and in one block, or the Free 120 Step 2 score calculator measures your review habits.

The Step 1 Free 120 plays this role a year earlier, and the Free 120 Step 2 score calculator reads best when you put it beside your NBME forms.

Not affiliated with, endorsed by, or sponsored by the NBME or the USMLE program. Every Free 120 Step 2 score calculator figure is an estimate.

Frequently asked questions

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

What percent correct passes on the Free 120 Step 2 score calculator?

About 67 percent. Thirty-nine wrong reads 219 and forty reads 217, so 218 sits between them.

Below two-thirds the Free 120 Step 2 score calculator falls away fast: 60 percent reads 206.

Is there an official NBME formula behind the Free 120 score conversion?

No. The sample reports percent correct only, and no official conversion exists for it.

The line in the Free 120 Step 2 score calculator is a fitted model, with its coefficients stated openly.

Does the Free 120 underestimate or overestimate Step 2 CK?

Both claims circulate without verifiable evidence, so the Free 120 Step 2 score calculator applies no correction.

Released items and 120 questions make a strong percentage weaker evidence.

How many points is one question worth on the Free 120 Step 2 score calculator?

Roughly 1.4. Each item is 0.83 percentage points, and the Free 120 Step 2 score calculator turns every percentage point into 1.7.

New Free 120 or old — which set does this conversion cover?

Both. One line is applied to whichever 120 questions you sat, so the Free 120 Step 2 score calculator never asks which release you downloaded.

Is a good Free 120 percentage enough to schedule my Step 2 CK exam?

Supporting evidence, not the deciding vote. Pair the Free 120 Step 2 score calculator with a full-length form and read both.

Can the Free 120 Step 2 score calculator work from a wrong count alone?

Yes. Enter the number missed and it derives the percentage, so an offline conversion from a paper tally returns the same estimate.

When should the Free 120 be taken during Step 2 CK prep?

Most people use it twice, once early for a baseline and once near the end.

Sit it timed either way, or the Free 120 Step 2 score calculator reports your habits.

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.

Thirty-nine wrong of 120 reads 219, and the Free 120 Step 2 score calculator is free to run again.

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