What Calculator Is Allowed for ACT? | Approved Models List

The ACT permits only non-CAS four-function, scientific, and graphing calculators on the mathematics test — Texas Instruments, Casio, and HP each have approved models that comply with the policy.

The ACT’s calculator policy allows calculators only on the Mathematics Test, including ACT WorkKeys Applied Math, and prohibits them during English, Reading, and Science sections. These rules apply to both paper and digital formats at all test sites in the US and internationally. Any calculator with Computer Algebra System (CAS) functionality is banned, along with devices like smartphones, tablets, and smartwatches. Knowing which calculator is allowed before test day prevents last-minute stress and disqualification.

Which Calculator Models Does the ACT Allow?

All Texas Instruments scientific and four-function calculators are approved. The specific TI graphing models that meet ACT requirements include the TI-83 Plus, TI-84 Plus, TI-84 Plus CE, TI-84 Plus CE Python, TI-Nspire CX (Non-CAS version only), and TI-Nspire CX II (Non-CAS version only). For Casio, the fx-9750GII and general non-CAS graphing and scientific models are permitted.

If you are in the market for a new model, the best calculator for ACT testing is typically the TI-84 Plus CE or the TI-Nspire CX Non-CAS — both are widely used, reliable, and fully compliant with ACT rules. For the digital ACT, the testing platform includes a built-in graphing calculator, but you may still bring your own approved handheld calculator if you prefer the feel and speed of your own device.

What Calculators Are Prohibited on the ACT?

Any device with CAS functionality is automatically banned. The most common prohibited models students bring include the TI-89, TI-92, TI-Nspire CAS, Casio ClassPad 300 and 400 series, Algebra fx 2.0, CFX-9970G, HP Prime, HP 48GII, HP 40G, HP 49G, and HP 50G.

Avoid the common mistake of assuming your phone calculator will work as a backup. Test proctors are trained to spot and confiscate prohibited devices, which can result in being dismissed from the test center. The ACT’s official calculator policy page provides the complete list of permitted and prohibited models for reference before test day.

What Modifications Do Some Calculators Require?

Before arriving at the test center, check that your calculator meets these preparation requirements. Remove all documents and any programs with CAS functionality — standard non-CAS programs are perfectly fine and do not need to be deleted. Remove paper tape completely from printing calculators. Turn off any sound, beeps, or alarms the calculator may produce. For HP 38G, 39G, and 48G series models, cover the infrared port completely with heavy opaque tape such as duct tape or electrician’s tape so no signal can pass through. All calculators must be battery-powered, so remove any power cords or electrical adapters. These simple prep steps ensure your calculator passes the proctor’s inspection without delays.

FAQs

Can I use a TI-84 Plus on the ACT?

Yes, the TI-84 Plus, TI-84 Plus CE, and TI-84 Plus CE Python are all approved for the ACT mathematics test. These are among the most popular graphing calculators used by test-takers and meet all ACT requirements.

Is the TI-Nspire CX allowed on the ACT?

The TI-Nspire CX Non-CAS version is allowed, but the TI-Nspire CX CAS is prohibited because its CAS functionality violates ACT rules. Check the model name on the calculator casing — if it includes “CAS,” leave it at home.

Can I use my phone as a calculator on the ACT?

No. Calculators built into cell phones, smartphones, or any device with wireless internet, Bluetooth, or cellular connectivity are strictly prohibited on the ACT and cannot be used even if put in airplane mode.