"AP Computer Science Principles Score Calculator" is searched after every practice exam and in the week after the real one, by students who want to turn a raw score into the 1 to 5. The arithmetic is published by the College Board and is on this page with a calculator; the only unknown is where the cut points fall, which the College Board sets after each exam and does not publish, so every calculator, this one included, uses estimates from released curves and says so. This page has the May 2027 format, the calculator, the estimated conversion table with raw-score examples, the May 2025 results, the free-response point values from the scoring guidelines, where the points are lost, and a printable worksheet.
Download the AP Computer Science Principles score worksheet and conversion table (PDF) (the May 2027 format, the worksheet, the estimated conversion table with raw-score examples, the 2025 distribution, where the points are lost and a plan by practice score; two pages, free).
How the exam is scored
| Section | Questions | Time | Share of the score | Points |
|---|---|---|---|---|
| I: multiple choice | 70 | 2 hours | 70% | 70, one each; no penalty for wrong answers |
| II: free response | 6 | the task is done in at least 9 hours of class time; the written responses take 60 minutes on exam day | 30% | 6: create task: video 1; create task: program requirements 1; written response 1 1; written response 2(a) 1; written response 2(b) 1; written response 2(c) 1 |
| Total | 2 hours (the end-of-course exam) | 100% | composite as a percentage |
Section I. 57 single-select questions, 5 single-select questions on a reading passage about a computing innovation, and 8 multiple-select questions with two correct answers; four answer options each.
Section II. The Create performance task is scored on six 1-point rows by AP readers: the video and the program requirements from the submitted task, and four written-response prompts answered on exam day with the Personalized Project Reference to hand (Written Response 1 and 2(a), 2(b), 2(c)); the values are the College Board's 2025 scoring statistics. The task is 30 percent of the score.
The composite. The College Board converts each section to its share of the score (70 percent for the multiple choice, 30 for the free response) and adds them; the composite is then converted to a 1 to 5 with cut points set after the exam so that the standard stays constant from year to year. The exam is fully digital in the Bluebook app; the performance task is submitted through the AP Digital Portfolio, 2 hours (the end-of-course exam) in total, on Friday 14 May 2027 (the Create performance task is due 30 April 2027).
The calculator
Enter the multiple choice correct and the points on each free-response question from a practice paper marked to the scoring guidelines (be strict: a reader is).
AP Computer Science Principles score calculator (May 2027 format; estimated cut points)
Composite = 70% x (multiple choice correct / 70) + 30% x (free-response points / 6). The 1 to 5 is read from estimated cut points (73%, 62%, 50% and 38% of the composite for a 5, 4, 3 and 2), which are estimates from released curves; the College Board sets the real cut points after each exam and does not publish them. A composite within three points of a cut is on the line. No penalty for wrong multiple-choice answers.
The conversion table (estimates)
| AP score | Composite (estimate) | For example | What it means |
|---|---|---|---|
| 5 | 73% and up | 51 of 70 multiple choice and 4 of 6 free response | Extremely well qualified |
| 4 | 62% to 72% | 43 of 70 multiple choice and 4 of 6 free response | Well qualified |
| 3 | 50% to 61% | 35 of 70 multiple choice and 3 of 6 free response | Qualified |
| 2 | 38% to 49% | 27 of 70 multiple choice and 2 of 6 free response | Possibly qualified |
| 1 | under 38% | No recommendation |
The raw-score examples assume the same percentage in both sections; any mix that gives the composite works. These cut points are estimates from the released curves of past years. The College Board sets them after each administration and they move by a few points; a practice composite within three points of a boundary is on it, not over it.
A worked example. 52 of 70 multiple choice right and free-response scores of 1, 1, 1, 1, 1, 1 (6 of 6): composite 82.0 percent, which is a 5 on the table, with room to spare.
The May 2025 results
| Score | 5 | 4 | 3 | 2 | 1 | 3 or higher | Mean |
|---|---|---|---|---|---|---|---|
| Share of 175,174 students | 10.7% | 19.9% | 31.2% | 21.4% | 16.8% | 61.9% | 2.87 |
From the College Board's student score distributions for the May 2025 exams. The share at each score is the real guide to the cut points: a 5 in Computer Science Principles is the top 10.7 percent of the students who sat it, whatever the raw score that took.
What the free-response questions ask
- Video and program requirements (2 points): the video shows the program running with input, functionality and output, and the code contains a list, a procedure with a parameter, a call to it, selection and iteration
- Written Response 1 (1 point): describe the purpose of the program and how the input, the list and the procedure work together
- Written Response 2(a), 2(b), 2(c) (3 points): explain the algorithm in the procedure, the selection and iteration in it, and how the list manages complexity, each referring to the code in the Personalized Project Reference
Where the points are lost
- The program requirements row: no procedure with a parameter that actually affects the behaviour, or a list that is only created and never used
- The video shows the program but not an input being given and the output changing because of it
- Written responses that describe the program in general instead of the specific lines in the project reference
- 'How the list manages complexity' answered with 'it stores data' rather than how the program would be written without it
- Multiple-select questions on the exam answered with one choice (both must be right for the point)
From a practice composite to the exam
| Practice composite | Likely score now | What moves it most |
|---|---|---|
| under 50% | 1 or 2 | content first: the units with the most multiple-choice misses, then one free-response question a week marked to the scoring guidelines |
| 50% to 61% | 3 | the free response: every lost point is a specific missing thing on the rubric; fix the pattern, not the question |
| 62% to 72% | 4 | timing and the hardest question type; a full timed paper every two weeks |
| 73% and up | 5 | keep it: a timed paper every two weeks and the free-response questions that score under 70 percent |
Where to get help
A 1-on-1 online class for AP Computer Science Principles with every released free-response question marked to the College Board's scoring guidelines, the way a reader marks it, so the student learns which words earn the points; a timed full paper every two weeks from March; and the calculator above used after each one. The first 30-minute class is free: send the last practice score on WhatsApp or the contact page. The other exams are on the AP score calculator hub.
Download the AP Computer Science Principles score worksheet and conversion table (PDF)
Sources: the College Board's AP Computer Science Principles exam page (apstudents.collegeboard.org and apcentral.collegeboard.org, the May 2027 format), the 2025 and 2026 scoring guidelines and scoring statistics (the free-response point values), and Student Score Distributions, AP Exams May 2025; read on 27 October 2026. The cut points are estimates, not College Board figures.
Questions parents ask
1How is the AP Computer Science Principles score calculated?
2What score do you need for a 5 on AP CSP?
3How is the Create performance task scored?
4What was the average AP CSP score in 2025?
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