What calculator is allowed on the ACT?
The ACT allows any four-function, scientific or graphing calculator on the Math test, unless it has a computer algebra system (CAS). The TI-84 Plus, TI-84 Plus CE and TI-Nspire without CAS are fine. The TI-89, TI-92, TI-Nspire CAS, HP Prime and Casio ClassPad are banned. You bring your own, and the online ACT also has Desmos built into the Math section.
In more detail
Calculators are allowed on the Math test only, and ACT says every problem can be solved without one. Testing staff do not hand out calculators, so bring your own. The line ACT draws is CAS: a calculator that can work with algebra symbolically, such as factoring or solving an equation for an exact answer, is out, whether the CAS is built in or downloaded.
Some calculators are allowed only after you change them. If yours can hold programs or documents, delete every document and any program with CAS functions. Turn off the sound, tear off the paper tape, remove power cords and cover an infrared data port completely with opaque tape. You cannot share a calculator, and breaking the policy gets you dismissed.
On the online ACT, the testing platform has the Desmos graphing calculator built into the Math section. ACT also encourages a calculator you already know, so practice on the one you will use. ACT's own tip is to do simple calculations by hand to save time.
ACT calculator rules at a glance (ACT, Texas Instruments)
| Calculator | Allowed? | Note |
|---|---|---|
| Four-function or scientific | Yes | Texas Instruments lists all its scientific and four-function models as approved |
| TI-84 Plus, TI-84 Plus CE, TI-84 Plus CE Python, TI-84 Evo, TI-83 Plus | Yes | On Texas Instruments' list of approved calculators for the ACT |
| TI-Nspire CX and CX II without CAS | Yes | TI-Nspire without CAS is permitted |
| TI-89, TI-92, TI-Nspire CAS | No | CAS: every model number starting with TI-89 or TI-92 |
| HP Prime, HP 48GII, HP 40G, HP 49G, HP 50G | No | CAS |
| Casio ClassPad 400, ClassPad 300 and m330, Algebra fx 2.0, CFX-9970G | No | CAS |
| Phone, tablet, laptop or PDA | No | Calculators built into phones are not permitted either |
| Keys in a QWERTY letter layout | No | Letter keys in any other layout are fine |
| Electronic writing pad or pen-input device | No | The Sharp EL 9600 is the exception |
| A permitted model with sound, paper tape, an infrared port or a power cord | Yes, after changes | Sound off, tape removed, port covered, cord removed |
Step by step
- 1
Find your calculator's exact model name and look for TI-89, TI-92, CAS, HP Prime or ClassPad. If it matches, pick another one.
- 2
Check ACT's calculator policy page for your brand, or Texas Instruments' ACT list if you own a TI.
- 3
Delete stored documents and any CAS programs, turn off the sound and tape over an infrared port.
- 4
Do timed Math practice with the exact calculator, so the keys feel familiar. If you test online, try Desmos too.
- 5
Pack fresh batteries and a backup calculator, because you cannot borrow one on test day.
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See also
More questions
Can I use a TI-84 on the ACT?
Yes. Texas Instruments lists the TI-84 Plus, TI-84 Plus CE, TI-84 Plus CE Python and TI-84 Evo as approved for the ACT. Delete any CAS programs and stored documents first.
Can I use my phone as a calculator on the ACT?
No. Calculators built into cell phones are not permitted, and neither are tablets or laptops. Bring a separate approved calculator.
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