The Calculus BC exam on the May 2027 format
Calculus BC uses the same structure as AB. Multiple choice is 42 questions in 1 hour 40 minutes: Part A, 29 questions without a calculator (35% of the score), and Part B, 13 questions with a graphing calculator (15%). Free response is six questions scored 0 to 9, two with a calculator and four without, for the other 50%. The question count falls from 45 to 42 for May 2027; the free-response section stays as it was.
What differs is the content. BC adds Unit 9, parametric equations, polar coordinates and vector-valued functions, and Unit 10, infinite sequences and series, which the course description marks as BC only. Use a BC practice exam, enter Part A and Part B separately, and score the free-response answers with the BC scoring guidelines.
A crowded top band
Because BC’s 2012 practice exam had today’s free-response section and the same half-and-half weighting, its chart is one of the closer fits here; only its 45-question multiple-choice section differs. The bigger uncertainty on BC is where you sit, not the chart: with nearly half of test takers on a 5, many practice results land just either side of the 4/5 line.
Watch the cushion line under the score. If one lost free-response point would drop you to a 4, or the result says “close to a 5”, the estimate is too near the line to rely on, and a few more practice series questions are the cheapest insurance. The Calculus AB calculator uses AB’s own 2012 chart.
AP Calculus BC exam format, May 2027
| Part | Scored out of | Share of score |
|---|---|---|
| Section I: Multiple choice · 1 h 40 min · 50% | ||
| Part A correct · No calculator, 62 minutes | 29 | 35% |
| Part B correct · Graphing calculator, 38 minutes | 13 | 15% |
| Section II: Free response · 1 h 30 min · 50% | ||
| Question 1 · Part A, calculator | 9 | 8.3% |
| Question 2 · Part A, calculator | 9 | 8.3% |
| Question 3 · Part B, no calculator | 9 | 8.3% |
| Question 4 · Part B, no calculator | 9 | 8.3% |
| Question 5 · Part B, no calculator | 9 | 8.3% |
| Question 6 · Part B, no calculator | 9 | 8.3% |
Estimated cutoffs
From the 2012 AP Calculus BC Practice Exam, scoring worksheet, College Board's newest published conversion chart for this subject (2012 exam: 45 multiple-choice questions (50%) and 6 free-response questions of 9 points (50%)). The calculator puts your weighted score on that chart's 0–108 scale.
| AP score | 2012 composite | Weighted score from |
|---|---|---|
| 5 | 68–108 | 62.5% |
| 4 | 56–67 | 51.4% |
| 3 | 42–55 | 38.4% |
| 2 | 35–41 | 31.9% |
| 1 | 0–34 | 0% |
AP Calculus BC score distributions
| Year | 5 | 4 | 3 | 2 | 1 |
|---|---|---|---|---|---|
| May 2026 | 46% | 22% | 14% | 14% | 4% |
| May 2025 | 44.0% | 21.9% | 12.8% | 15.2% | 6.2% |
Share of students earning each score, from College Board's AP Calculus BC score distributions. 160,436 students took the exam in May 2025. The May 2026 figures are College Board's rounded whole percentages.