AP Biology score calculator.

AP Biology exam format

The College Board describes the AP Biology exam as a 60-question multiple-choice section (1 hour 30 minutes, 50% of the exam score) of discrete questions and sets of questions tied to a shared stimulus, typically four or five questions per set, and a free-response section (1 hour 30 minutes, 50%) of six questions.

The free-response section has two long questions worth 9 points each and four short questions worth 4 points each, which makes 34 points. The long questions ask students to interpret and evaluate experimental results, one of them with graphing. The short questions cover scientific investigation, conceptual analysis, analysis of a model or visual representation, and data analysis.

How the composite is worked out

The calculator turns each section into a share of the composite using its published weight: 60 multiple-choice questions (50% of the exam score) and 6 free-response questions (50%). Multiple choice counts 0.8 composite points per correct answer here, and each free-response point is worth about 1.47 composite points. Because the two sections are weighted equally, one free-response point is worth about 1.8 times as much as one multiple-choice question here.

Worked example

With 45 of 60 multiple-choice correct and 20 of 34 free-response points, the multiple-choice section contributes 37.5 composite points and the free-response section 29.4, for a composite of 66.9%. With the starting cut points that is an estimated 4, and about 4 more multiple-choice answers would reach the cut for a 5.

Reality check from the 2026 results

On the 2026 exam, 15% of students earned a 5, 25% a 4, 31% a 3, 21% a 2 and 8% a 1; 71% earned a 3 or higher. By comparison, far more AP Calculus BC students earn a 5, so a composite of the same percent can land differently across subjects.

Cut points: what is and is not known

The College Board says AP cut points are set using research that compares AP students with college students in comparable courses, and it does not publish them. The starting cut points on this page (70%, 55%, 40% and 28% for a 5, 4, 3 and 2) are placeholders. If you know how a recent practice test was curved by your teacher or a published source, enter those numbers instead. Treat a result within a few points of any cut as undecided.

Scoring your free response honestly

Use a released AP Biology free-response question and its scoring guidelines. Each long question is out of 9 and each short question out of 4. Give yourself points only where your written answer matches a point in the guideline, and count the experimental design and data-analysis points separately.

Sources

• AP Biology exam page (College Board) — exam format, section question counts and weights
• 2026 AP Score Distributions (College Board) — share of students earning each score
• About AP Scores (College Board) — how scores are combined and how cut points are set
• AP Score Scale Table (College Board) — what each score recommends

Section counts, weights and 2026 distributions were retrieved November 2026 from the College Board pages listed. The cut points are editable assumptions, not College Board data.

Frequently asked questions

How is the AP Biology exam scored?

The multiple-choice section has 60 questions and counts for 50% of the exam score. The free-response section has six questions, two long worth 9 points and four short worth 4 points, and counts for the other 50%.

How many free-response points are there on AP Biology?

The College Board states long questions are worth 9 points each and short questions 4 points each. With two long and four short questions that is 34 points.

Does this calculator know the AP Biology curve?

No. The College Board does not publish composite cut points. The starting cut points are editable assumptions.

What share of students earn a 5 on AP Biology?

In the 2026 results 15% earned a 5 and 71% earned a 3 or higher.