The Best Calculator to Use for the FE Exam: An Interactive Guide

Choosing the right NCEES-approved calculator is a critical step in your FE exam preparation. Use our smart selector to find the perfect model for your needs and discipline.

FE Exam Calculator Selector

What is the NCEES Calculator Policy?

The National Council of Examiners for Engineering and Surveying (NCEES) has a very strict policy regarding calculators allowed during the Fundamentals of Engineering (FE) exam. To ensure fairness and prevent any potential for cheating, only specific, non-programmable calculator models are permitted. You cannot bring a graphing calculator, a calculator with a QWERTY keyboard, or any device with wireless communication capabilities. Using a non-approved calculator will result in your exam being invalidated, so it’s critical to purchase and practice with an approved model well before exam day. Finding the best calculator to use for the FE exam means choosing from this pre-approved list.

NCEES Approved Calculator Models

The “formula” for choosing the best calculator to use for the FE exam begins with the official NCEES-approved list. As of the latest update, the only models allowed are from three manufacturers: Texas Instruments, Casio, and Hewlett-Packard.

List of NCEES-approved calculator families for the 2026 exams.

Manufacturer	Approved Model Series	Key Characteristics
Texas Instruments	All TI-30X and TI-36X models	Very common in US schools. The TI-36X Pro is a top contender.
Casio	All fx-115 and fx-991 models	Known for powerful features and a high-resolution display.
Hewlett-Packard	HP 33s and HP 35s models	Less common; may use Reverse Polish Notation (RPN). The HP 35s is often hard to find.

Practical Examples: Choosing a Calculator

Let’s see how different engineers might choose the best calculator to use for the FE exam based on their needs.

Example 1: Sarah, a Civil Engineering Student

• Inputs: Discipline: Civil, Priority: Best Overall
• Result: The selector recommends the Texas Instruments TI-36X Pro.
• Reasoning: For most Civil Engineering tasks like matrix operations for structures, vector math, and general calculations, the TI-36X Pro is more than sufficient. Its user interface is familiar to most US students and it handles all required functions with ease.

Example 2: Michael, an Electrical Engineering Student

• Inputs: Discipline: Electrical, Priority: Most Powerful Features
• Result: The selector recommends the Casio fx-991EX ClassWiz.
• Reasoning: Electrical engineering often involves complex number calculations, base conversions, and matrix equations. The Casio fx-991EX is exceptionally strong in these areas and has a high-resolution display that makes complex expressions easier to read.

How to Use This FE Exam Calculator Selector

Our tool is designed to simplify your decision. Follow these steps to find the best calculator for your situation:

1. Select Your Discipline: Choose your engineering branch from the first dropdown. While all approved calculators can work for any exam, some models have slight advantages for certain fields (e.g., complex number functions for electrical engineers).
2. Choose Your Priority: Are you looking for the most popular, well-rounded model? Or do you need the absolute most powerful solver? Perhaps you’re on a tight budget. This input helps weigh the options.
3. Click “Find My Best Calculator”: The tool will process your inputs and provide a primary recommendation along with a detailed reason for the choice.
4. Review the Results: The output will give you a model name, its key strengths for your scenario, and some potential drawbacks to consider. The best calculator to use for the fe exam is the one you are most comfortable with.

Key Factors That Affect Your Choice

When selecting the best calculator to use for the FE exam, consider these factors:

• Familiarity: If you’ve used TI calculators throughout college, the TI-36X Pro will have a minimal learning curve. Sticking with a familiar layout can save precious seconds during the exam.
• Display Type: Modern calculators like the TI-36X Pro and Casio fx-991EX have “textbook” or “natural” displays, showing fractions and equations as they are written. This is a huge advantage over older models.
• Solver Capabilities: Both the TI-36X Pro and Casio fx-991EX have powerful numerical solvers for systems of equations and polynomials, a crucial feature for many FE exam problems.
• Complex Number Operations: For Electrical and Computer Engineering candidates, a calculator’s ability to handle complex numbers efficiently is a major factor. The Casio models are often praised for this.
• Battery vs. Solar: Most recommended models are dual-powered (solar with a battery backup), so you don’t have to worry about the battery dying mid-exam.
• Price: The top models are generally affordable, typically costing between $20 and $25. The price difference is usually not significant enough to be the primary deciding factor.

Check out a detailed guide on FE Exam NCEES Approved Calculators for more insights.

Frequently Asked Questions (FAQ)

1. Which calculator is the most popular for the FE exam?

The Texas Instruments TI-36X Pro is widely regarded as the most popular and best all-around calculator for the FE exam due to its user-friendly interface and robust features.

2. Can I use a TI-89 or TI-Nspire?

No. Graphing calculators like the TI-89 and TI-Nspire are strictly prohibited by the NCEES calculator policy.

3. What’s the main difference between the TI-36X Pro and the Casio fx-991EX?

The TI-36X Pro is often seen as more intuitive, especially for those used to TI calculators. The Casio fx-991EX is sometimes considered slightly more powerful, with more functions and a higher-resolution screen, but may have a steeper learning curve for some.

4. Can I bring a backup calculator?

You can bring a backup calculator, but it must also be an NCEES-approved model. The proctors will inspect both.

5. Is there a calculator provided on the computer during the exam?

Yes, the NCEES exam interface includes a digital version of the TI-30XS MultiView. However, most candidates strongly prefer using their own physical calculator they have practiced with.

6. Should I buy my calculator long before the exam?

Absolutely. You should purchase your chosen calculator as early as possible and use it for all your practice problems. Familiarity is key to speed and accuracy on exam day.

7. Does the HP 35s have any advantages?

The HP 35s is a powerful calculator, but it’s known for using Reverse Polish Notation (RPN), which is a different way of entering equations. It has a steep learning curve and is not recommended unless you are already an expert with RPN.

8. Where can I find the official NCEES policy?

You should always check the official NCEES website for the most current calculator policy before your exam. See their exam information page for details.