AP Calculus AB score calculator: how the composite score is worked out from the multiple choice and the free response (the 1.2 weighting, the 108 points), the conversion table from composite to a 1 to 5, what percentage you need for each score, a worked example, the May 2025 score distribution, where the points are lost, and a printable score worksheet (free PDF)

"AP Calculus AB 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 simple and the College Board publishes it; 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 the released curves. This page gives the calculation, the table, a worked example, the official 2025 distribution, and the seven places points are lost, with a printable worksheet.

Download the AP Calculus AB score worksheet and conversion table (PDF) (the four-line worksheet, the section table, the conversion table, the 2025 distribution, the seven ways points are lost and a plan by practice score; two pages, free).

How the exam is scored

No points are taken off for wrong answers, so every multiple-choice question is answered. Each free-response question is scored 0 to 9 by a reader with the College Board's scoring guidelines, typically three parts at 3 points each, and the points are for the set-up, the working and the justification as much as the answer.

The score calculator, in four lines

1. Multiple choice correct (out of 45): ____
2. Line 1 × 1.2 (out of 54): ____
3. Free response: Q1 __ + Q2 __ + Q3 __ + Q4 __ + Q5 __ + Q6 __, each out of 9 (out of 54): ____
4. Composite = line 2 + line 3 (out of 108): ____

Then read the composite against the table below.

Worked example. 32 multiple choice correct gives 38.4. Free response 6 + 5 + 7 + 4 + 6 + 5 = 33. Composite 71.4: a 5 on most years' curves, with little margin. One more point on two of the free-response questions is the safe side of the line, and those points are usually a justification sentence, not more mathematics.

The conversion table

These are estimates from released exams and the published curves of past years; the College Board sets the cut points after each administration to keep the standard constant across years, and they move by a few points. A practice composite within three points of a boundary is on the line. Note what the table says about the standard: a 5 needs about two-thirds of the points, not ninety percent, which is why a student who has the rules automatic and writes the justifications gets there with a few wrong answers to spare.

The May 2025 results

The shape is the thing to notice: the two most common scores are a 4 and a 2, with fewer 3s than either. Students split into those who have the derivative and integral rules automatic and write what the readers want, and those who have a gap in one of the two, and the gap costs points in both sections.

Where the points are lost

1. Part A multiple choice: a rule applied wrongly. The chain rule missed, the product rule reversed, a u-substitution with the dx forgotten. These are the cheapest points on the exam to recover: twenty released multiple-choice questions a week by unit until the rules are automatic.
2. Part B multiple choice: the calculator used for the wrong things. It should do the numerical integral, the root and the value of the derivative at a point; it should not do algebra, and the time it eats when it does is the time Part B runs out of.
3. Free response: the right number with no set-up. The integral, the derivative or the equation has to be written before the answer, or the method points are gone.
4. Free response: the justification missing. "f has a local minimum at x = 2" scores nothing without "because f′ changes from negative to positive at x = 2". The readers give points for the reason, and the reason has a fixed form for each question type, which is learnable.
5. Units and signs in context. A rate in a context question needs its units, and a negative rate needs the sentence that says what is decreasing.
6. Time in Section II, Part A. Two calculator questions in 30 minutes, usually one with a table or a graph; a student who has not practised that type under time loses the second question.
7. Rounding. Three decimal places in the final answer, intermediate values at full precision; rounding a stored value early costs the answer point.

From a practice composite to the exam

The practice exams themselves, and where the free official ones are, are in the AP Calculus AB practice exam post, which has a 20-question printable set in the format.

Where to get help

A 1-on-1 online class for AP Calculus AB with a tutor who holds a master's in mathematics and has taught AB and BC since 2018: every released free-response question marked to the College Board's scoring guidelines, timed practice exams from March with the composite worked out as above, and the unit the class is on a week ahead. Before school (7 am Eastern is 4:30 pm for the tutor), after school or weekends, US time; the recording and notes after every class; US$10 to $13 an hour, billed monthly. The free 30-minute first class is a real lesson on the unit you are on. The AB and BC decision is in AP Calculus AB vs BC, and the course before it in is precalculus harder than calculus.

Download the AP Calculus AB score worksheet and conversion table (PDF)

Questions parents ask

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