Free forever Calculate score
Updated for the 2026 AP exam

Free AP study guides for every subject.

Unit walkthroughs, cheat sheets, formula sheets, FRQ guides, and a score calculator for all 33 AP exams. Written by Mahmudul Hasan, who sat these exams and remembers which parts actually hurt.

  • You never need an account, and nothing sits behind a paywall.
  • Cut score estimates rebuilt for the 2026 exams.
  • All 33 AP subjects have their own calculator. 20 have unit-by-unit walkthroughs, and 27 have a full FRQ guide.
Every guide and every calculator is free to read, with no sign-up.
AP Score Calculator
Free · No signup · Updated 2026
AP Subject
MCQ — correct answers / 45
45 questions · 1.20× weight per correct
Free-response sections
Curves are reasonable estimates. Your actual score is set by the College Board.
Your predicted score Calc AB
Awaiting your scores.
Enter MCQ and FRQ values on the left, then press Calculate.
What’s on Curve

Every AP subject, every kind of study guide.

Curve started as a score calculator and turned into a library. These are the AP study guides it holds now, grouped by what you actually need them for — whether you’re revising between units, self-studying a subject your school doesn’t offer, or a teacher pointing a class at a walkthrough.

Progress Check walkthroughs

The largest section here — unit-by-unit walkthroughs across 20 subjects, following the College Board’s Course and Exam Description (CED) unit order. Each one explains what a question is testing and the mistake most people make on it.

Score calculators

Enter your multiple-choice count and free-response scores for any of 33 subjects and get a predicted 1–5 with the composite behind it. Cut scores are estimates, published on every subject page.

FRQ and writing guides

Built around the scoring rubric rather than model answers — what earns each point, and what reads well but scores nothing. Plus drafting tools for AP Lang, Seminar and Research.

Concepts and key terms

When you just need one idea explained properly, rather than a whole unit. Each hub opens onto its individual explainers.

Maps and languages

Map reading trips up more students than it should, and the language exams have their own drills.

Choosing courses and exam logistics

Before you sit anything — how hard a course actually is, what it costs to register, and what changed now that most exams are taken on Bluebook.

We help you study — not cheat. Curve publishes walkthroughs and explanations, never raw answer keys. The difference matters, and we’ve written down exactly where the line sits — read our academic integrity stance.
Find your subject

33 subjects. Pick yours.

Each tile opens that subject’s full exam review — format, timing, scoring, and links to every guide we have for it.

AP Biology
AP Chemistry
AP Physics 1
AP Environmental Sci
AP Calculus AB
AP Calculus BC
AP Statistics
AP Precalculus
AP English Language
AP English Literature
AP Psychology
AP Human Geography
AP World History
AP U.S. History
AP European History
AP U.S. Government
AP Macroeconomics
AP Microeconomics
Where most people start

Study guides students actually finish.

Scores
What Your AP Score Actually Means
Score distributions, what a 3 is worth, and how the curve gets set.
Maps hub
Types of Maps in AP Human Geography
A side-by-side guide to projections, choropleths, and isolines.
Logistics
AP Exam Registration & Cost
Deadlines, fees, and what to do if you are self-studying a subject.
Writing tool
AP Style Checker & Word Counter
Stay under the 5,000-word ceiling without trimming the wrong sentence.
How-to
How to Check AP Scores (2026)
Step-by-step, with the dates and what to do if scores are delayed.
AP Classroom
How AP Classroom Actually Works
Assignments, timers, and what your teacher can and cannot see.
How Curve works

Three steps, about ten seconds.

Same flow for every subject. Designed for the phone in your hand the night before an exam.

Try the calculator
01
Pick your subject
All 33 AP subjects. Each has its own scoring curve and FRQ structure baked in.
02
Enter your scores
Your MCQ correct count plus your free-response section scores. You don’t need an account.
03
See your result
Your predicted 1–5, the composite it came from, and the credit most colleges give for it.
Built with care

How these guides get written, and who checks them.

Written from experience
Mahmudul Hasan writes the walkthroughs, then rewrites the parts that keep tripping people up.
Updated yearly
Every July, after the College Board releases scores, he rechecks the curves and updates the unit summaries.
Transparent math
The exact cut-score thresholds we use are documented on every subject calculator page.
Every walkthrough is structured the way I wish someone had explained it to me when I was studying.
Mahmudul Hasan · Founder
282 guides, 33 subjects
Every subject calculator uses that exam’s real MCQ and FRQ structure. The cut scores are estimates, and each one is published on the subject’s own page.
Rechecked every July
Pages open with the AP exam framing, then explain the concept the way a study buddy would — not the way a textbook does.
Questions

AP study guide questions, answered.

Are Curve’s AP study guides really free?

Yes. Every guide, walkthrough and calculator on the site is free to read. There is no account, no trial and no paywall, and nothing is held back for a paid tier.

Which AP subjects do you cover?

The AP score calculator covers all 33 AP subjects. Unit-by-unit Progress Check walkthroughs exist for 20 subjects, and full FRQ guides for 27. Cheat sheets, formula sheets and concept explainers cover the subjects where students ask for them most.

Do you publish AP Classroom answer keys?

No, and we won’t. Curve publishes walkthroughs that explain what a question is testing and where people go wrong, never raw answer keys. Our academic integrity stance sets out exactly where that line sits.

How accurate is the AP score calculator?

It uses each exam’s real MCQ and FRQ structure and weighting, so the composite it shows is accurate. The 1-5 cut scores are estimates based on previously released curves, because the College Board sets the real thresholds after each administration. The exact numbers we use are published on every subject page.

What is the difference between a study guide and a Progress Check walkthrough?

A study guide covers a whole topic or exam – a cheat sheet, a formula sheet, a subject review. A Progress Check walkthrough follows one AP Classroom unit in the College Board’s own order and explains the reasoning behind the question types in it.

Do I need an account to use anything?

No. Nothing on the site asks you to sign in. The calculator runs entirely in your browser, so the scores you type are never sent to or stored on our servers.

Who writes these AP study guides?

Mahmudul Hasan writes and maintains them. Curves and unit summaries are rechecked every July, once the College Board has released that year’s scores.

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