Checked against College Board, October 2026
AP Calculus AB Exam Overview
What the AP Calculus AB exam actually asks of you, part by part — including the one thing students get caught out by, which is that the calculator rule changes four times across the exam.
- 3h 10m
- Total testing time
- 42
- Multiple-choice questions
- 6
- Free-response (9 pts each)
- 4
- Separately timed parts
Exam timeline
3h 20m from the first question to the last. With check-in and instructions, budget close to four hours at school, and arrive at least 20 minutes early.
The main exam date is Monday, May 10, 2027, 204 days from today. Start times vary by school, and there are alternate dates during the late-testing window.
Section I Part A — Multiple Choice
1h 2m · 35% of your score29 questions · no calculator
Done entirely by hand. Expect limits, derivative rules and the theorems you are asked to name conditions for, with analytical, graphical, tabular and verbal representations throughout. Nothing is deducted for a wrong answer, so never leave one blank.
Section I Part B — Multiple Choice
38 min · 15% of your score13 questions · graphing calculator required
The calculator comes out for the last stretch of Section I. These are the questions that expect a numerical answer you would not get by hand, so round only at the end and keep three decimal places unless told otherwise.
Break
about 10 minutesSupervised, between the two sections. With your proctor's permission you can leave the room for water or a snack, but you cannot leave the building, use a phone, or look at notes.
Section II Part A — Free Response
30 min · 16.7% of your score2 questions · graphing calculator required
The two calculator questions, and usually the ones carrying a real-world context. You still have to write the setup: an answer with no supporting work generally earns nothing, even when it is right.
Section II Part B — Free Response
1h · 33.3% of your score4 questions · no calculator
Back to no calculator for the last four questions, which is the longest single block of the exam. Notation and communication are scored here and nowhere else, so write what you are doing, not just the result.
Confirm your individual test date, location and start time with your AP coordinator.
Question styles
Both sections mix algebraic, exponential, logarithmic and trigonometric functions, and present them analytically, graphically, in tables and in words. Section II is scored against four mathematical practices; Section I assesses only the first three.
- Implementing Mathematical Processes
- Determine expressions and values using mathematical procedures and rules.
- Connecting Representations
- Translate mathematical information from a single representation or across multiple representations.
- Justification
- Justify reasoning and solutions.
- Communication and Notation
- Use correct notation, language, and mathematical conventions to communicate results or solutions.
Communication and Notation is assessed in the free-response section only, which is why notation costs you marks there and nowhere else. College Board's own weightings put Implementing Mathematical Processes at 50-70% of Section I and 35-60% of Section II.
What is allowed on the exam
A graphing calculator. Scientific and four-function calculators are not accepted. There is no single rule for the whole exam: a graphing calculator is required for Section I Part B and Section II Part A, and not permitted for Section I Part A and Section II Part B. Bluebook provides a built-in Desmos graphing calculator, and you may bring up to two approved handheld calculators of your own.
Models with the built-in capabilities expected for AP Calculus are marked with an asterisk. You do not need to clear your calculator's memory before or after the exam. The approved list changes, so check it before exam day — it is linked in the sources at the bottom of this page.
What each unit is worth
There are eight units in AP Calculus AB. Units 5 and 6 are the most heavily weighted at 15-20% each; Units 3 and 7 are the lightest at 5-10%. Units 9 and 10 belong to Calculus BC and are not on this exam.
| Unit | Topics | Weighting | Section I questionsQuestions |
|---|---|---|---|
| Unit 1 Limits and Continuity | 16 | 10-15% | 4-6 of 42 |
| Unit 2 Differentiation: Definition and Fundamental Properties | 10 | 10-15% | 4-6 of 42 |
| Unit 3 Differentiation: Composite, Implicit, and Inverse Functions | 6 | 5-10% | 2-4 of 42 |
| Unit 4 Contextual Applications of Differentiation | 7 | 10-15% | 4-6 of 42 |
| Unit 5 Analytical Applications of Differentiation | 12 | 15-20% | 6-8 of 42 |
| Unit 6 Integration and Accumulation of Change | 11 | 15-20% | 6-8 of 42 |
| Unit 7 Differential Equations | 7 | 5-10% | 2-4 of 42 |
| Unit 8 Applications of Integration | 12 | 10-15% | 4-6 of 42 |
Question counts are each unit's published weighting applied to the 42 multiple-choice questions, rounded. They are ranges because College Board publishes the weightings as ranges, and the exact split moves year to year.
2025 AP score distribution
College Board's own figures for the May 2025, worldwide administration. A 4 is the most common result, and 64.2% of students scored 3 or higher.
1
37,277
2
65,405
3
42,896
4
82,970
5
58,174
This plot is not broken, and the figures are not mistyped: more students earn a 2 (22.8%) than a 3 (15%). AP Calculus AB really does dip in the middle rather than peaking there, which is unusual among AP exams and is why the bars do not form a single hump. The numbers are transcribed exactly from College Board's published distribution, linked in the sources below.
Each section is scaled to 50 points and added for a composite out of 100, which maps onto the 1 to 5 scale. The score calculator can help you understand what each score means, and work backwards to set a target for each section based on the score you are aiming for.
Before exam day
Your school is the authority on how your own exam runs, and they will tell you exactly what to bring. This is College Board's general list, and their prohibited list is worth reading properly, because a couple of the entries surprise people.
Bring
- Up to two approved graphing calculators — a scientific or four-function calculator will not do
- A fully charged testing device with Bluebook installed, plus its charging cable, unless your school provides one
- Sharpened No. 2 pencils with erasers, and a pen with black or dark blue ink
- A watch, as long as it is not a smartwatch
- A photo ID, if you are testing somewhere other than your own school
Not allowed in the room
- Calculators with a QWERTY keypad, stylus input, or any wireless or Bluetooth capability
- Mechanical pencils — ordinary No. 2 pencils only
- Smartwatches, fitness trackers and any other wearable
- Your own books, notes and scratch paper
Bring a snack and a bottle of water for the break. They cannot come into the exam room, but you will want them at the halfway point, and there is nowhere to buy anything once the administration has started.
The night before. Charge your device and have everything you need laid out. Sleep matters more than one last review pass at this point: the exam runs 3h 10m, and you want to be well-rested and feeling your best for it. Eat a healthy breakfast the morning of, wear comfortable clothing, and leave yourself plenty of time to get there.
Where to start
The table above is the fastest way to see where the 42 multiple-choice questions actually fall, so you can weight your revision by what the exam weights. Studyfor5's AP Calculus AB course is still being written, and the course outline shows which topics are live so far. The score calculator is live now and works out what each section has to be for the score you are after, and early access is open if you want the lessons as they land.
Common questions
What calculator do I need?
A graphing calculator, and only a graphing calculator — scientific and four-function models are not accepted. It is required for Section I Part B and Section II Part A, and not permitted for Section I Part A and Section II Part B — so you sit roughly two-thirds of the exam without it. Bluebook also provides a built-in Desmos graphing calculator. You may bring up to two approved handhelds, and you do not need to clear their memory.
Is there a penalty for guessing?
No. Nothing is deducted for a wrong answer and a blank scores exactly the same as a wrong one, so there is never a reason to leave a multiple-choice question unanswered. If you are running out of time, put something down for every remaining question.
Do I lose marks for not showing my work?
On the free-response section, yes, and this is where most avoidable points go. College Board's scoring guidelines state that answers without supporting work usually receive no credit, and decimal answers are expected to three places unless a question says otherwise. Writing the setup is worth marks even when the arithmetic goes wrong.
How is the exam scored?
Both sections count for exactly half. Each is scaled to 50 points and the two are added for a composite out of 100, which maps onto the 1 to 5 scale. The six free-response questions are 9 points each. Because the sections have different raw totals, one multiple-choice question moves your composite further than one free-response point does. Work out your own score.
How long is the exam, start to finish?
3h 10m of actual testing across four separately timed parts, plus a break of about 10 minutes between the two sections. Check-in and instructions happen before any of that starts, so block out most of a half day.
What is a good AP Calculus AB score?
A 3 is conventionally called qualified, and 64.2% of students scored 3 or higher in May 2025. But College Board does not award your credit — each college sets its own policy and plenty want a 4 or a 5, and for calculus in particular a 4 is often the line for placing out of a first course. Check the schools you are actually applying to.
Which units matter most?
Units 5 and 6 are the biggest at 15-20% of the multiple-choice section each, so between them they are worth roughly a third of it. Units 3 and 7 are the lightest at 5-10%. The table above converts every weighting into question counts out of 42.
Sources
- AP Calculus AB and BC Course and Exam Description — section structure, timing, weighting, and per-unit multiple-choice weightings; committed at data/calculus-ab/cedReference/
- AP Calculus AB and BC Course and Exam Description Clarifications and Corrections — the Fall 2026 multiple-choice count and timing revision, effective with the May 2027 exams
- 2025 AP Calculus AB Scoring Guidelines — 9 points per free-response question; the only source for the per-FRQ point value
- AP Calculus AB Student Score Distributions, May 2025 — score distribution, cohort size, mean, and standard deviation
- AP Calculus AB Exam — assessment overview — corroborates the CED section structure and timing on the student-facing page
- AP Exam calculator policies — per-part calculator requirement, the approved handheld list, and Bluebook built-in Desmos
- AP Calculus AB Exam — AP Central — the 2026-27 update statement and the link to the clarifications document
- 2025 AP Calculus AB Free-Response Questions — the Section II directions: the per-part calculator rule, the materials students work with (a formula sheet is not among them), and the within-part navigation rule; committed at data/calculus-ab/frqReferences/
All College Board figures on this page were read from those documents and checked October 2026. Score percentages are College Board's own and do not total exactly 100, because each is rounded independently.