Is Your Calculator Allowed?
Check all features that apply to your calculator. The tool will instantly tell you if it’s likely permitted or prohibited for the ACT math test.
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Visual permissibility status
What Does “Can You Use a Solar Calculator on the ACT” Mean?
The question “can you use a solar calculator on the ACT” isn’t about the solar power itself, but about whether the specific model of calculator is permitted under the ACT’s official policy. The ACT allows most 4-function, scientific, and graphing calculators, as long as they aren’t on the prohibited list. The power source (be it solar, battery, or both) is not the primary concern. Instead, the ACT focuses on features that could provide an unfair advantage.
This page’s calculator is designed to clarify that. By checking your calculator’s features against the known list of prohibited characteristics, you can determine if your device, whether it’s a solar calculator or not, is compliant. The main takeaway is that a simple solar-powered scientific calculator is almost certainly allowed, while a complex graphing calculator with prohibited features (like a Computer Algebra System) is not, regardless of its power source.
The “Formula” for ACT Calculator Permissibility
There isn’t a mathematical formula, but a logical one. A calculator is deemed PERMITTED only if it meets all the required conditions and has none of the prohibited features. The rule can be expressed as:
Permitted = NOT (Has_CAS OR Has_QWERTY OR Is_A_Smart_Device OR … etc.)
This means if even one of the prohibited features is present and not correctly modified (e.g., removing tape from a printing calculator), the device is banned. The question of whether you can use a solar calculator on the ACT is therefore a question of features, not power.
Variables in the Permissibility Decision
Variable (Feature)
Meaning
Unit (Status)
Typical Range
CAS Functionality
Ability to solve algebra symbolically.
Boolean (Present/Absent)
Prohibited if present.
QWERTY Keyboard
A computer-style keyboard.
Boolean (Present/Absent)
Prohibited if present.
Communication Device
Part of a phone, tablet, etc.
Boolean (Is/Is Not)
Prohibited if it is.
External Power
Requires a power cord.
Boolean (Needs/Does Not Need)
Prohibited if needed.
Solar Power
Runs on solar cells.
Boolean (Is/Is Not)
Generally permitted.
Table 1: Key features determining if a calculator is allowed on the ACT.
Practical Examples
Example 1: Basic Solar Scientific Calculator
A student has a standard TI-30Xa solar-powered scientific calculator. They use the checker:
Inputs: All checkboxes are left unchecked. It has no CAS, no QWERTY keyboard, isn’t a smart device, and runs on solar/battery power.Units: The inputs are boolean (yes/no questions).Results: The calculator shows PERMITTED . The reason is that it has no prohibited features. The solar power aspect is irrelevant to the decision.
Example 2: Advanced Graphing Calculator with QWERTY
A student has an older TI-92 Plus, which has a QWERTY keyboard and a powerful CAS.
Inputs: The student checks “Does it have a Computer Algebra System (CAS)?” and “Does it have a QWERTY-style keyboard?”.Units: Not applicable.Results: The calculator immediately shows PROHIBITED . The explanation lists two violations: the presence of a CAS and a QWERTY keyboard, both of which are explicitly banned by the ACT. This shows why understanding the specific rules is more important than asking if a generic “graphing calculator” is allowed.
How to Use This ACT Permissibility Calculator
Using this tool is a straightforward process to check if you can use your solar calculator (or any other) on the ACT.
Inspect Your Calculator: Look at your physical calculator and identify its features. Does it have letter keys? Does it graph? Can it connect to a computer?Check the Boxes: For each question in the calculator form, check the box if the feature applies to your device. Be honest—the goal is to avoid issues on test day.Review the Result: The tool will instantly update. A green “PERMITTED” means you are likely safe. A red “PROHIBITED” means you need to get a different calculator. The tool will also list the specific reasons for its decision.Interpret the Results: The result is based on the official ACT calculator policy. If it’s prohibited, the explanation will tell you exactly which rule your device violates.
Key Factors That Affect Calculator Permissibility
Computer Algebra System (CAS): This is the most common reason for a graphing calculator to be banned. CAS can solve algebraic equations, which undermines the purpose of many test questions.QWERTY Keyboard: Calculators with keyboards like a computer (in QWERTY layout) are prohibited to prevent storage of text notes.Communication Capabilities: Any device that can communicate wirelessly (Bluetooth, Wi-Fi) or is part of a communication device (phone, smartwatch) is strictly forbidden.Need for an Outlet: Calculators that need to be plugged in are not allowed. They must be battery- or solar-powered.Noise and Printing: Devices that make noise must be muted, and those with paper tape must have the tape roll removed.Official Prohibited List: The ACT publishes a list of specific models that are banned, such as the TI-89 and HP 50G series. Always check this list. The question “can you use a solar calculator on the ACT” is best answered by confirming your model is not on this list and has no prohibited features.
Frequently Asked Questions (FAQ)
1. So, can you use a solar calculator on the ACT?
Yes, as long as the calculator itself is permitted. The fact that it’s solar-powered does not disqualify it. A basic solar four-function or scientific calculator is fine.
2. Is there an official list of approved calculators?
The ACT does not provide a comprehensive “approved” list because so many models are allowed. Instead, they provide a “prohibited” list and general rules to follow.
3. What if my graphing calculator has programs on it?
You must remove them. Test proctors may inspect your calculator, and having programs (especially those with CAS functionality) can lead to dismissal.
4. Can I use the calculator on the ACT Science section?
No, calculators are only permitted for the Mathematics test. They are not allowed on the Reading, English, or Science sections.
5. What’s the difference between a TI-Nspire and a TI-Nspire CAS?
The standard TI-Nspire (non-CAS) is permitted on the ACT. The TI-Nspire CAS is prohibited because it has a Computer Algebra System. This is a critical distinction.
6. What happens if I’m caught with a prohibited calculator?
You may be dismissed from the test, and your scores will be voided. It is your responsibility to bring a compliant device.
7. Can I bring a backup calculator?
Yes, the ACT encourages you to bring a backup calculator with fresh batteries in case your primary one fails. The backup must also be a permitted model.
8. What about the digital ACT?
For the digital version of the test, a graphing calculator (Desmos) is built into the testing platform. You can also bring your own permitted handheld calculator.
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