Are You Allowed to Use Calculator on ACT?
Determine calculator eligibility and potential score improvement
Formula: Efficiency = (Manual Speed × Proficiency Factor) / Base Time. Eligibility based on ACT’s official prohibited list.
Time Spent per Section (Seconds)
Comparison of average solving time per problem.
| Manufacturer | Model Series | Allowed? | Feature Restriction |
|---|---|---|---|
| Texas Instruments | TI-84 Plus / CE | ✅ Yes | None |
| Texas Instruments | TI-Nspire CAS | ❌ No | CAS functionality prohibited |
| Casio | fx-9750 / fx-9860 | ✅ Yes | None |
| HP | HP Prime | ✅ Yes | Must use Exam Mode |
What is are you allowed to use calculator on act?
One of the most frequent questions students ask during their test preparation is: are you allowed to use calculator on act? The short answer is yes, but with very specific and strict limitations. The ACT Math section is designed so that every question can technically be solved without a calculator, but having the right device is a significant strategic advantage.
The policy exists to ensure equity among test-takers. While the ACT allows most scientific and graphing calculators, it strictly prohibits any device with a Computer Algebra System (CAS). If you are caught using a prohibited device, your scores will be cancelled immediately without a refund. Knowing exactly are you allowed to use calculator on act prevents testing day anxiety and potential disqualification.
Who should use this guide? High school students, tutors, and parents navigating the standardized test requirements should pay close attention to these rules. A common misconception is that “any expensive calculator is better.” In reality, a high-end calculator like the TI-Nspire CAS is actually forbidden, whereas a standard TI-84 is the gold standard.
are you allowed to use calculator on act Formula and Mathematical Explanation
While the ACT doesn’t provide a formula for calculator use, we can quantify the impact of your device on your performance using an Efficiency Index. The core benefit of asking are you allowed to use calculator on act is identifying the time-saving potential.
The formula for Calculator Efficiency (CE) used in our tool is:
CE = (MS × P) / 10
Where:
- MS (Manual Speed): The time in seconds it takes to solve a problem without a tool.
- P (Proficiency): Your familiarity with the calculator functions on a scale of 1-10.
| Variable | Meaning | Unit | Typical Range |
|---|---|---|---|
| MS | Manual Solving Speed | Seconds | 45 – 90 |
| P | Proficiency Score | Scale 1-10 | 5 – 9 |
| CE | Calculator Efficiency | Ratio | 1.0 – 5.0 |
Practical Examples (Real-World Use Cases)
Example 1: The Prepared Student
A student uses a TI-84 for ACT and has spent months practicing. Their manual speed is 60 seconds per question. With a proficiency of 9/10, they reduce their per-question time to 42 seconds. Over 60 questions, they save 1,080 seconds (18 minutes), allowing them to review difficult geometry problems at the end.
Example 2: The Prohibited Device Risk
A student brings a TI-89, unaware of the answer to are you allowed to use calculator on act. Because the TI-89 has CAS capabilities, the proctor flags the device. The student must complete the test without any calculator, increasing their average time per question to 80 seconds. They fail to finish the last 15 questions, resulting in a significant score drop.
How to Use This are you allowed to use calculator on act Calculator
Using our tool is simple and helps you verify your ACT calculator policy compliance:
- Select your model: Use the dropdown to find your specific device. If it says “Prohibited,” you must find a different calculator immediately.
- Enter your speed: Be honest about how long math takes you without help.
- Rate your proficiency: If you only know how to add and subtract, choose a low number. If you know how to graph and use the solver, choose 8 or higher.
- Analyze the results: Look at the “Time Saved” and “Score Lift” to see how much your preparation is paying off.
Key Factors That Affect are you allowed to use calculator on act Results
- CAS Functionality: Devices that can solve algebraic equations symbolically are 100% prohibited. This is the biggest factor in are you allowed to use calculator on act.
- Battery Life: Even if your device is allowed, a dead battery makes it useless. Always bring backups.
- Exam Mode: Some newer calculators like the HP Prime are allowed only if they are locked into a specific “Exam Mode” that disables certain apps.
- Proficiency: A calculator is only as fast as its operator. Knowing ACT math tools shortcuts like “Math -> Frac” saves valuable seconds.
- Noise: Calculators that have paper tapes or make loud clicking noises may be prohibited by individual proctors if they disturb others.
- Power Source: Calculators that require an AC outlet or have communication capabilities (Bluetooth/Wi-Fi) are strictly forbidden.
Frequently Asked Questions (FAQ)
1. Are you allowed to use calculator on act if it has a QWERTY keyboard?
No, calculators with letter keys in a QWERTY format (like some older TI-92 models) are strictly prohibited.
2. Can I bring two calculators to the ACT?
Yes, you are allowed to bring a backup, but only one may be on your desk at a time. The backup must also meet the ACT prohibited calculators criteria.
3. Is the TI-Nspire allowed on the ACT?
The TI-Nspire (Non-CAS) is allowed. However, the TI-Nspire CAS is NOT allowed. Check the faceplate of your device carefully.
4. What happens if my calculator is prohibited?
The proctor will ask you to put it away. If you have already started the math section, your test may be invalidated. Always double-check are you allowed to use calculator on act before arriving.
5. Do I need a graphing calculator for a high score?
While not strictly necessary, a graphing calculator is one of the most effective TI-84 for ACT benefits because it helps visualize complex functions.
6. Can I use my phone’s calculator app?
Absolutely not. No phones, tablets, or wearable technology are permitted in the testing center.
7. Is the Casio fx-115ES Plus allowed?
Yes, this is a popular scientific calculator that is fully permitted on the ACT.
8. How can I improve my timing with the calculator?
Develop an ACT timing strategy that involves using the calculator only for arithmetic and complex graphing, not for simple calculations like 5×7.
Related Tools and Internal Resources
- ACT Calculator Policy Guide – A detailed breakdown of every single model.
- ACT Prohibited Calculators List – Avoid these 15 specific models to stay safe.
- ACT Math Prep Tools – Resources to boost your math score beyond the calculator.
- TI-84 vs TI-Nspire for ACT – Which calculator should you buy for the big day?
- ACT Timing Strategy – Learn how to save 10 minutes on the math section.
- Standardized Test Requirements – Rules for SAT, ACT, and AP exams.