How this calculator works
AP Biology has 60 multiple-choice questions and six free-response questions. The multiple-choice section contributes half of the composite and the free-response section the other half, so each section is first turned into a fraction of its maximum and then multiplied by 50. The free-response maximum is 34 points: two long questions worth 9 each and four short questions worth 4 each. The composite out of 100 is then compared with estimated cut points to predict an AP score. College Board sets the real cut points after each exam through standard setting, and they move from year to year.
Formula
composite = (multiple-choice correct / 60) x 50 + (free-response points / 34) x 50. Estimated AP score uses cut points of 74 for a 5, 60 for a 4, 43 for a 3 and 26 for a 2; below 26 is a 1. These are practice-exam estimates, not official thresholds.
Worked example
A student with 40 of 60 multiple-choice correct and free-response points of 6, 5, 3, 3, 3 and 3 has 23 free-response points out of 34. The composite is (40 / 60) x 50 + (23 / 34) x 50 = 33.33 + 33.82 = 67.16. That falls between 60 and 74, so the estimate is a 4. Raising the multiple-choice score to 50 adds 8.33 composite points and pushes the result to about 75.5, a 5.
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Frequently asked questions
Are these official AP cut scores?
No. College Board does not publish fixed raw-score cut points. It sets the boundaries for each exam year after standard setting, and they can move by a few points. The cut points here are widely used practice-exam estimates and should be read as a range, not a guarantee.
How many free-response points are there?
The current AP Biology exam has 34: two long questions at 9 points each and four short questions at 4 points each. Older versions of the exam used 10-point long questions, which is why some calculators show a total of 36 or 40. This page follows the current College Board format.
Why is each section worth 50 percent?
The College Board weights the two sections equally. That means one multiple-choice question is worth 50 / 60 = 0.833 composite points, while one free-response point is worth 50 / 34 = 1.47 composite points. Free-response points therefore matter more per point, which is useful when deciding where to focus.
What score do I need for a 5?
Under these estimates, a composite of about 74 out of 100 predicts a 5. With 50 multiple-choice correct, you would need about 33 free-response points; with 45 correct, about 22. Because the cut point varies, aim comfortably above the estimate rather than exactly at it.