Is the TI-Nspire CX CAS Allowed on the ACT?

iThe plain answer

Answer.

Banned

No. The Texas Instruments TI-Nspire CX CAS is banned for ACT Math because it is the CAS variant, and the cited policy quote prohibits or excludes CAS calculator functionality. Use a non-CAS physical model instead.

iiThe reasoning

Why this verdict.

TI-Nspire CX CAS includes CAS functionality, which the ACT calculator policy explicitly prohibits.

Based on the cited policy quote, this verdict treats the Texas Instruments TI-Nspire CX CAS as banned for ACT Math because the controlling feature is CAS, not the Texas Instruments brand name or the general graphing form factor. The calculator data in this guide identifies this model as a CAS graphing calculator with symbolic algebra capability. That makes it materially different from a non-CAS TI-Nspire model, even though the product names can look similar in a store listing or classroom conversation. The conclusion is intentionally narrow: it does not say every graphing calculator is banned, and it does not rely on a guess about how a setting might be disabled. It follows the quoted policy language and the model feature data already stored for this calculator.

iiiPrimary evidence

Official source.

Official source · 01ACT Calculator Policy

Based on the cited policy quote, the relevant evidence is the CAS prohibition or exclusion. The guide data classifies the Texas Instruments TI-Nspire CX CAS as a CAS graphing calculator, so this file applies that quote to the exact model rather than to the broader TI-Nspire family. The note is intentionally conservative and does not infer approval from brand, graphing capability, classroom familiarity, or possible mode changes.

“Calculators with built-in or downloaded computer algebra system (CAS) functionality are prohibited.”

ACT Inc.Accessed 2026·05·15

ivWhat to watch

Caveats.

Do not bring the Texas Instruments TI-Nspire CX CAS as a fallback device for ACT Math; this verdict is based on the CAS feature identified in the stored calculator data.

Check the printed model name, startup screen, and retail listing carefully, because non-CAS TI-Nspire models are separate products with different verdict files.

Do not rely on disabling menus, clearing memory, changing modes, or covering labels; the conservative reading treats the model capability as the problem.

If you need graphing support, choose an alternative whose own verdict is approved for the same exam and recheck the official policy near test day.

For planning, write down the exact model, color, serial-style label, borrowed owner, backup choice, charger, batteries, cover, and accessories before exam morning so no last-minute substitution changes the device being evaluated.

If you buy secondhand, avoid vague listings, regional editions, school bundles, modified firmware, missing labels, cracked screens, unreadable keys, or seller claims that cannot be matched to the authority's written policy.

vEquivalent models

Alternatives.

Texas Instruments

TI-Nspire CX II

Non-CAS color graphing calculator; distinguished from the CAS variant (TI-Nspire CX CAS) by the absence of symbolic algebra.

GraphingOpen file

Texas Instruments

TI-84 Plus CE

Rechargeable color graphing calculator widely used in US high school math courses.

GraphingOpen file

Casio

fx-CG50

Color graphing calculator with programming features but no CAS capability.

GraphingOpen file

Reader questions

FAQ.

Q.01What exact issue makes the TI-Nspire CX CAS unacceptable?

The issue is CAS functionality. Based on the cited policy quote and the calculator data already stored for this model, the Texas Instruments TI-Nspire CX CAS is the CAS version with symbolic algebra capability. This verdict does not rest on the calculator being expensive, rechargeable, color-screen, programmable, or graphing. It rests on the specific prohibited feature identified in the source quote.

Q.02Does this ban cover every TI-Nspire calculator?

No. This file is for the Texas Instruments TI-Nspire CX CAS. A non-CAS TI-Nspire model has to be checked under its own verdict file, because a similar product name can hide a different feature set. When comparing boxes or used calculators, look for the CAS marking on the case, startup screen, documentation, and listing title rather than relying on a short classroom nickname.

Q.03Can I make the calculator acceptable by disabling CAS?

Do not plan around disabling features. The conservative reading used here is model-based: if the calculator includes CAS capability and the cited quote prohibits or excludes CAS, this guide treats the device as banned. A proctor should not have to audit modes, memory, menus, documents, or settings to turn a prohibited model into an approved one.

Q.04What should I use instead if I need similar workflow?

Choose a non-CAS alternative that has its own approved verdict for ACT Math. Before buying or borrowing, compare the exact model name, not just the brand family, and open the official policy page again near test day. If a testing authority or test-center instruction conflicts with this summary, follow the authority's current written rule.

Cross-exam matrix