What Calculator Is Needed for Precalculus? | Class & AP Exam Guide

Picking the wrong calculator for precalculus can mean scrambling before an exam. The answer depends on whether you’re in a regular high school or college precalculus class or taking the AP version, which has specific requirements. Here’s what you actually need to know for each scenario, so you can buy the right tool the first time.

What a Precalculus Calculator Must Be Able To Do

Whether you choose a scientific or graphing model, your calculator needs to handle the core functions of the course. At minimum, it must perform exponents, roots, trigonometric values, and logarithms. For graphing models, the required skills go further: graphing functions and analyzing graphs, generating a table of values, finding real zeros and intersection points, and computing regressions for linear, quadratic, exponential, and sinusoidal models. College Board’s AP Precalculus calculator requirements list these functions explicitly.

Standard Precalculus vs. AP Precalculus: The Difference

If your course is a standard high school or college precalculus class, a scientific calculator with trig, logs, exponents, roots, and parentheses may be sufficient — but a graphing calculator is the more universally useful choice. Some schools or individual teachers require a graphing model, so check the syllabus first. For AP Precalculus, the situation is different: College Board’s policy requires a graphing calculator on Part B of Section I (Multiple Choice) and Part A of Section II (Free Response). On those sections, you may use either an approved handheld graphing calculator or the built-in Desmos calculator that comes with the Bluebook testing application. Only the Bluebook version of Desmos is allowed — the web-based or app-based Desmos calculators are not permitted during the AP exam.

For readers ready to buy right now, our tested roundup of the best calculators for precalculus covers the top models for each class type and budget.

Approved Graphing Calculators for AP Precalculus

For AP Precalculus, College Board maintains a specific list of approved calculator families and series. The major approved families include:

• Texas Instruments: TI-83, TI-83 Plus, TI-84 Plus, TI-84 Plus CE, TI-Nspire CX II, and TI-Nspire CX II CAS series, among many others.
• Casio: FX-9750 series, FX-9860 series, FX-CG-50, and FX-CG-500.
• HP: HP Prime.
• Sharp: EL-9900 series, Graph35 series, and Graph95 series.
• NumWorks: Software Version 19.3 and higher.

The full list includes many specific model numbers and version constraints, so check the official policy before relying on a given calculator. Note that the FX-CG-500 has a stylus, and using a stylus is not permitted during the AP exam.

How Much You’ll Pay

Prices vary widely. A basic scientific calculator that covers trig and logs costs about $9 to $20, and a graphing calculator like the TI-84 Plus runs approximately $115. If you only need a scientific model for a regular class and the syllabus allows it, you can save a lot — but if there’s any chance of AP Precalculus, a graphing calculator is the smarter long-term investment.

Common Calculator Mistakes in Precalculus

The most frequent error is buying a non-approved calculator for AP Precalculus and discovering it can’t be used on exam day. Another common trap is using the web-based Desmos calculator instead of the Bluebook-built-in version during the AP exam — only the Bluebook version is permitted. Finally, don’t assume a Computer Algebra System (CAS) calculator is automatically better; AP approval depends on the specific model series, not just the presence of CAS.