Best Calculator for the FE Exam

Choosing the right calculator for the Fundamentals of Engineering (FE) exam is critical. The NCEES has a strict policy on approved models, and using a familiar, powerful tool can save you valuable time. This guide and our interactive selector will help you find the best calculator to use for the FE exam based on your needs.

FE Exam Calculator Selector

Feature Breakdown of Top Models

Model	Key Features	Typical Price	Pros	Cons
TI-36X Pro	Multi-view display, MathPrint, Complex numbers, Matrix/Vector operations	$20 – $25	Excellent all-arounder, intuitive interface	Keys can feel slightly less responsive than Casio
Casio FX-115ES Plus	Natural Textbook Display, 417 functions, SOLVE function, Complex numbers	$18 – $25	Very fast, great display, feature-rich	Older model, succeeded by FX-991EX
Casio FX-991EX	High-res display, QR code generator, Spreadsheet mode, 552 functions	$22 – $30	The most feature-packed option, very modern	Some features (like QR) are not usable in the exam
HP 35s	RPN (Reverse Polish Notation) entry, Programmable	$45 – $60	Powerful for RPN users, programmable for speed	Steep learning curve, expensive, not for beginners

A detailed comparison of the most popular calculators allowed in the FE exam.

---

An SEO-Optimized Guide to the FE Exam Calculator

What is the best calculator to use for fe exam?

The “best calculator to use for fe exam” is not a single model, but rather the NCEES-approved calculator that you are most comfortable and efficient with. The National Council of Examiners for Engineering and Surveying (NCEES) maintains a strict calculator policy to ensure fairness and prevent the use of devices with communication or extensive text-storage capabilities. Your choice is limited to specific models from Casio, Texas Instruments, and Hewlett Packard. The most important factor is choosing one of these models early in your studies and using it exclusively. This builds “muscle memory,” allowing you to perform calculations quickly and accurately under pressure. Common misconceptions include thinking that the most expensive calculator is the best, or that you can bring a powerful graphing calculator like a TI-89 (you cannot). The best calculator is a tool that becomes an extension of your problem-solving process, not a hindrance.

FE Exam Calculator Formula and Mathematical Explanation

There isn’t a mathematical formula to find the best calculator. Instead, we use a decision framework. Think of it as a qualitative equation: Best Calculator = f(NCEES Compliance, Feature Set, Usability, Price). Each variable must be carefully weighed to determine the optimal choice for your specific situation. This framework is the core logic behind our selector tool and is a robust way for any candidate to find the best calculator to use for fe exam success.

Variable	Meaning	Unit	Typical Range
NCEES Compliance	Whether the model is on the official approved list.	Binary (Yes/No)	Must be ‘Yes’
Feature Set	Functions available (matrix, vector, complex numbers, solver, etc.).	Qualitative	Basic scientific to advanced (e.g., TI-30X vs. Casio FX-991EX)
Usability	Ease of use, key layout, and display type (e.g., Multi-line vs. Natural Textbook).	Qualitative	Varies by personal preference and prior experience.
Price	The cost of the calculator.	USD ($)	$15 – $60

Decision framework variables for selecting your FE exam calculator.

Practical Examples (Real-World Use Cases)

Example 1: The Budget-Conscious Civil Engineering Student

Maria is a civil engineering student on a tight budget. She needs a reliable, NCEES-approved calculator that can handle matrix operations for structures and statistics for transportation analysis. Using the selector, she enters a budget of $20 and a priority of “Budget-Friendly”. The recommendation is the Casio FX-115ES Plus or TI-36X Pro. Both are excellent, affordable options. She chooses the TI-36X Pro because she used a similar TI model in high school. This is a perfect example of finding the best calculator to use for fe exam without overspending.

Example 2: The Feature-Focused Electrical Engineering Student

John is studying for the Electrical & Computer FE exam. He is not concerned about price and wants the most powerful tool available to handle complex numbers, phasor conversions, and matrix equations efficiently. He sets his priority to “Advanced Features”. The tool recommends the Casio FX-991EX. Its high-resolution display makes complex number results easier to read, and its processing speed gives him confidence. By practicing with this advanced tool, John masters its functions, making him faster on exam day.

How to Use This FE Exam Calculator Selector

Our calculator is designed to simplify your choice. Follow these steps:

1. Select Your Discipline: Choose your engineering branch from the dropdown. This helps weigh features like complex number handling (crucial for Electrical) or advanced statistics.
2. Enter Your Budget: Input your maximum comfortable price. This will filter out models that are too expensive.
3. Set Your Priority: Are you looking for the absolute best performance, the cheapest option, or the one with the most bells and whistles? This helps refine the final recommendation.
4. Review the Results: The tool will instantly provide a primary recommendation and key details. The chart and table below the tool offer further data for comparison. Understanding these results is key to finding the best calculator to use for fe exam day.
5. Practice: Once you’ve purchased your recommended calculator, use it for all your study sessions. Check out our FE exam study guide for more tips.

Key Factors That Affect Your Calculator Choice

• The NCEES Calculator Policy: This is the most critical factor. Your calculator MUST be on the approved list. No exceptions. Checking the official NCEES website is the first and most important step.
• Discipline-Specific Needs: Electrical engineers need excellent complex number functionality. Civil engineers need robust matrix solvers. Mechanical engineers may prioritize equation solvers and unit conversions.
• Display Type: Modern calculators have “Natural Textbook” or “MathPrint” displays that show equations as they appear in a textbook. This drastically reduces input errors compared to older, single-line displays.
• Solver Functionality: Built-in equation solvers (like Newton-Raphson methods) can save an enormous amount of time on certain problems, turning a 5-minute manual calculation into a 30-second input task.
• Ease of Use and Familiarity: The best calculator is one you know inside and out. If you’re already familiar with a certain brand’s layout (e.g., Texas Instruments), sticking with that brand can reduce the learning curve. This is a huge component in what makes the best calculator to use for fe exam.
• Power Source: Most top models are dual-powered (solar with a battery backup). This provides peace of mind that your calculator won’t die mid-exam.

Frequently Asked Questions (FAQ)

1. Can I use my TI-89 or other graphing calculator?

No. Absolutely not. Any calculator with graphing, communication, or extensive text storage capabilities is strictly forbidden. Bringing a non-approved calculator will result in it being confiscated. For more information, read the official NCEES calculator policy.

2. What’s the difference between the TI-36X Pro and the Casio FX-991EX?

Both are top-tier choices. The TI-36X Pro is praised for its intuitive interface and solid build. The Casio FX-991EX is slightly faster and has more functions, including a high-resolution screen and a basic spreadsheet mode. You can’t go wrong with either, so the choice often comes down to personal preference.

3. Should I really buy the calculator months in advance?

Yes. This is a critical piece of advice. You need to be completely fluent with your calculator’s functions—storing variables, solving equations, handling matrices, and converting units. The only way to achieve this fluency is through hundreds of hours of practice during your FE exam prep.

4. Is the HP 35s a good choice?

The HP 35s is a powerful, programmable calculator, but it’s only recommended for engineers who are already proficient with Reverse Polish Notation (RPN). For the vast majority of students, the learning curve is too steep and not worth the effort compared to the more intuitive algebraic-entry models from TI and Casio.

5. What happens if my calculator battery dies during the exam?

This is a nightmare scenario you can avoid. Choose a dual-power (solar and battery) model. Test the battery before your exam. Some candidates even bring a second, identical, NCEES-approved calculator as a backup for peace of mind.

6. How do I know which features are most important?

Look at the NCEES exam specification for your discipline. If you see topics like “Linear Algebra” or “Complex Numbers,” you’ll know that matrix and complex number functions are vital. Our FE exam practice problems will also help you understand which calculations are common.

7. Does having the best calculator to use for fe exam guarantee a pass?

No. A calculator is just a tool. It cannot replace a thorough understanding of engineering fundamentals. However, having the right tool and knowing how to use it efficiently can save you critical time, reduce errors, and increase your confidence, which significantly improves your chances of passing.

8. Where is the best place to buy an FE-approved calculator?

Major online retailers like Amazon, as well as office supply stores like Staples or Office Depot, are reliable sources. University bookstores also typically carry the NCEES-approved models.