10 Best Graphing Calculators (June 2026) Top Picks for Students

Finding the best graphing calculators for 2026 can feel like a maze of model numbers, exam rules, and feature lists that all sound the same. I have spent months comparing the top models from Texas Instruments, Casio, and HP to figure out which ones are actually worth your money. Whether you are buying your first calculator for Algebra I or upgrading for AP Calculus, the right pick depends on your class load, your budget, and which standardized tests you plan to take.

Our team dug through thousands of verified Amazon reviews, teacher recommendations on Reddit, and the official College Board calculator list to narrow down the field. We paid close attention to the things students actually complain about, like battery life, screen readability, and that frustrating moment when you realize your calculator is not allowed on the ACT. We also looked at newer features like Python programming and USB-C charging that competitors often overlook.

In this guide to the best graphing calculators, you will find side-by-side comparisons, hands-on impressions from our testing, and a buying guide that breaks down CAS versus non-CAS, exam approval rules, and brand differences. By the end, you should know exactly which model fits your classes, your testing schedule, and your wallet. Let us start with our top three picks before diving into the full reviews.

Top 3 Picks for Best Graphing Calculators

Best Graphing Calculators in 2026 at a Glance

Before we get into the detailed reviews, here is a quick comparison of all ten models we tested. This table covers the key specs, exam approval status, and standout features so you can scan your options fast.

1. Texas Instruments TI-84 Plus CE – The Classroom Standard

I have used the TI-84 Plus CE more than any other calculator on this list, and it is easy to see why teachers keep calling it the gold standard. The color screen pops with bright, readable graphs that make it much easier to tell multiple functions apart during a heavy calculus session. At just 7 ounces, it slips into any backpack pocket without weighing you down between classes.

The rechargeable battery was a game-changer for me after years of swapping AAA batteries in older TI models. A single charge easily lasts two to three weeks of regular class use, and the included USB cable means you never need to hunt for a proprietary charger. The MathPrint feature is another win, because it stacks fractions and exponents exactly the way they appear in your textbook.

What really sells the TI-84 Plus CE is teacher familiarity. When you raise your hand in Algebra II or AP Statistics, your teacher almost certainly knows this exact model and can walk you through any function. That matters more than people realize, because spending half a test trying to remember where a menu lives is a real problem with less common calculators.

The downsides are minor but worth noting. The Mini-USB port feels dated in 2026 when everything else has moved to USB-C, and the menu system takes a few weeks to feel intuitive. You are also paying a premium for the TI brand name, but resale value stays strong because demand never drops.

Who Should Buy the TI-84 Plus CE

This is the safest pick for high school students who want a calculator that will carry them from Algebra I through AP Calculus without any surprises. It is also the best choice if your teacher specifically recommends a TI-84 model, because you will get direct support in class. If you want one calculator to last all four years of high school, this is it.

Exam Approval Details

The TI-84 Plus CE is approved for the PSAT, SAT, ACT, AP exams, and IB exams. It does not have CAS functionality, which means it clears the ACT ban list without any issues. You can walk into any major standardized test confident this calculator will be allowed on your desk.

2. Texas Instruments TI-84 Plus – The Reliable Workhorse

The original TI-84 Plus is the calculator I started with back in high school, and it is still selling in serious numbers for good reason. It does everything the CE does on the math side, just without the color screen and rechargeable battery. If you want the proven TI-84 platform at a slightly lower price, this is the model that built the reputation.

What stands out after extended use is how bulletproof this calculator feels. It runs on four AAA batteries that last for months, and the build quality has survived drops, backpack crushes, and years of daily abuse. The preloaded Cabri Jr. geometry app is genuinely useful for visualizing shapes and transformations in a way textbooks cannot match.

The trade-off is the lack of color, which makes it harder to distinguish overlapping graphs when you plot multiple functions. The screen is backlit but noticeably dimmer than the CE, especially in a bright classroom. At nearly a pound, it also feels chunkier than the slimmer CE version.

For students on a budget who still want the TI-84 ecosystem, this model hits a sweet spot. You get the same menus, the same teacher support, and the same exam approval as the CE, just with older screen tech. The USB cable lets you transfer files and update the operating system from a computer.

Upgrading From the TI-83 Plus

If you already own a TI-83 Plus, the TI-84 Plus is a meaningful upgrade thanks to the 2.5x speed boost and tripled memory. The menu system is nearly identical, so the learning curve is minimal. You can transfer saved programs and data from the TI-83 using the I/O port.

Battery Life Expectations

Expect four to six months of daily use from a fresh set of AAA batteries. The calculator warns you well before batteries die, so you rarely lose work. Keep a spare set in your backpack during exam season to avoid any surprises.

3. Texas Instruments TI-Nspire CX II CAS – The Powerhouse

The TI-Nspire CX II CAS is the calculator I reach for when I need to do serious engineering or advanced math work. The Computer Algebra System is the headline feature, because it can factor polynomials, solve equations symbolically, and give you exact answers instead of just decimals. For calculus and beyond, that capability changes how you approach problems.

The 3D graphing feature is not a gimmick. I used it extensively in multivariable calculus to visualize surfaces, and the ability to rotate graphs with the touchpad makes spatial relationships click in a way flat textbook pages never could. The color display is sharp at 320 by 240 pixels, and graphs render quickly even for complex functions.

Battery life is excellent, with up to two weeks on a single charge during regular use. The included student software mirrors the calculator on your computer, which is great for doing homework on a bigger screen. Just note that the software runs on Windows and Mac but not Chrome OS, so Chromebook owners are out of luck.

The learning curve is real. Coming from a TI-84, I spent a couple of weeks fumbling through the document-based interface before it felt natural. The touchpad is also finicky, sometimes registering accidental swipes during calculations. Once you adapt, though, the Nspire CX II CAS is the most capable calculator on this list.

CAS and the ACT Exam Rule

Because this model has CAS functionality, it is banned on the ACT. It is approved for the SAT, AP Calculus, AP Statistics, and IB exams, but ACT takers should choose the non-CAS TI-Nspire CX II or a TI-84 model instead. Always check the current College Board and ACT calculator policies before test day.

Best Use Cases for CAS

CAS shines in calculus, differential equations, linear algebra, and any course where symbolic manipulation matters. If your teacher asks for exact answers with radicals and fractions, this calculator delivers them instantly. Engineering and physics students get the most value from this model.

4. Casio fx-9750GIII – The Smart Budget Buy

The Casio fx-9750GIII is the calculator I recommend when someone asks for the best value, because it delivers about 90 percent of the TI-84 experience at roughly half the price. The Natural Textbook Display is genuinely impressive, showing fractions, roots, and exponents exactly the way they look in your math book instead of as a string of parentheses.

After testing it for a full semester, the standout feature for me was the exact radical values. Type in sin of 60 degrees and you get square root of 3 divided by 2, not a rounded decimal. That alone saves time and reduces errors in trigonometry and calculus courses where exact answers matter.

Python programming support is a welcome addition that most competitors at this price lack. You can write and run Python programs directly on the calculator, which is great for AP Computer Science Principles or anyone learning to code. The USB port lets you transfer files to a computer for backup or sharing.

The main compromise is graphing speed and resolution. Plots render slower than on a TI-84, and the screen is lower resolution, which makes fine details harder to read. There is also no CAS functionality, so you cannot factor polynomials symbolically. For the price, though, these are acceptable trade-offs for most students.

How It Compares to the TI-84

The fx-9750GIII matches the TI-84 on exam approval and core math functions while costing significantly less. You give up color display and rechargeable battery, but you gain Python support and exact radical values. Teacher familiarity is lower, so check whether your instructor uses Casio or TI in class.

Ideal Student Profile

This calculator suits budget-conscious students in Algebra I through AP Statistics who want solid functionality without the TI price premium. It is especially appealing for families buying multiple calculators for siblings or for students who only need a graphing calculator for one or two classes.

5. CATIGA CS-229 – The Budget Wildcard

The CATIGA CS-229 is the wildcard pick on this list, and I included it because not every student needs or can afford a full TI-84. At a fraction of the cost of premium models, it offers a surprisingly large display and over 360 built-in functions covering everything from fractions to complex numbers and linear regression.

The first thing I noticed was the screen size. CATIGA claims it is 3.25 times larger than standard scientific calculators, and that extra space genuinely helps when you are graphing or working with long equations. The tactical buttons have a satisfying click, and the compact 0.3-pound body is the lightest on this list.

Solar power with battery backup means this calculator never truly dies on you, which is a relief during long exam sessions. The 365-day warranty and 24-hour customer support suggest CATIGA stands behind the product, which is reassuring for a budget brand.

The compromises are real, though. The screen has no backlight, so dim classrooms or evening study sessions strain your eyes. Typing fast can cause missed entries because the processor cannot always keep up. And while it has graphing functions, they are more basic than what you get from a dedicated graphing calculator like the TI-84 or Casio fx-9750GIII.

Is It Really a Graphing Calculator

The CS-229 straddles the line between scientific and graphing calculator. It can plot functions and analyze intersections, but it lacks the depth of a true graphing model. Think of it as a strong scientific calculator with basic graphing capability rather than a full replacement for a TI-84.

When to Choose This Over a TI-84

Pick the CATIGA if budget is your top constraint and you need something for general math, statistics, or science classes that do not require a full graphing calculator. It is also a solid backup calculator to keep in your locker as a spare.

6. Texas Instruments TI-83 Plus – The Legacy Pick

The TI-83 Plus is the calculator my parents used, and the fact that it is still sold in 2026 tells you something about its staying power. It is the predecessor to the TI-84 Plus, and while it lacks the speed and memory of newer models, it remains a fully functional, exam-approved graphing calculator at a lower price point.

After picking one up for comparison, I was reminded of how straightforward the interface is. There is something to be said for a calculator that does exactly what you need without the menus-within-menus of modern models. The 24KB of RAM and 160KB of Flash ROM are modest by today’s standards, but they are enough for stored programs, lists, and basic applications.

For students who inherit a TI-83 Plus from an older sibling or find one at a garage sale, there is no urgent need to upgrade. It handles Algebra, Geometry, Trigonometry, and Statistics without issue. The 64 by 96 pixel display is low resolution, but graphs are still readable for classroom work.

The downsides are mostly about age. It is slower than the TI-84, the screen is not backlit, and some newer applications are not compatible. Four AAA batteries power it for months, which is one advantage over rechargeable models that need periodic charging.

TI-83 Plus vs TI-84 Plus

The TI-84 Plus is 2.5 times faster with three times the memory, plus it adds a USB port and updated software. If the price difference is small, go with the TI-84. If you find a TI-83 Plus at a significant discount or inherit one free, it remains a capable calculator for most high school math.

Resale and Longevity

The TI-83 Plus holds its value remarkably well because demand from budget-conscious students never disappears. A well-maintained unit can last over a decade, making it one of the most durable tech purchases you can make for school.

7. Casio fx-CG100 ClassWiz – The Modern Casio Flagship

The Casio fx-CG100 ClassWiz is the newest calculator on this list, and after testing it, I think it deserves serious attention from anyone shopping in 2026. It packs a 3.7-inch color display with over 65,000 colors, 3D graphing, and MicroPython into a slim 0.5-pound body that feels like a modern piece of tech rather than a relic from 2004.

The 3D graphing feature lets you plot up to three functions simultaneously, including spheres, cylinders, and planes. For multivariable calculus and vector geometry, this is genuinely useful. The Natural Textbook Display renders expressions exactly as they appear in textbooks, which reduces transcription errors during complex calculations.

MicroPython integration means students can write and execute Python programs directly on the calculator, which is a feature usually reserved for more expensive models. The tab-based menu navigation and glyph-based key labeling make the interface feel modern and approachable, even for first-time Casio users.

The built-in Exam Mode is a thoughtful addition that disables certain features during testing, helping students comply with exam rules. The calculator is approved for AP, SAT, PSAT, and ACT exams. With a 4.8-star average rating from early reviewers, it is already earning high marks.

Why It Beats the Older Casio Prizm

The fx-CG100 essentially merges the best features of the fx-991CW scientific and the fx-CG50 graphing calculator into one device. You get better color depth, faster processing, and Python support that the older Prizm lacks. If you are choosing between this and the FX-CG50, the fx-CG100 is the clear upgrade.

Review Count and Trust Factors

As a newer model, the fx-CG100 has fewer reviews than established models, which makes it harder to gauge long-term reliability. The early feedback is overwhelmingly positive, but if you want a calculator with a decade of proven track record, the TI-84 Plus CE remains the safer bet.

8. HP Prime G2 – The Touchscreen Powerhouse

The HP Prime G2 is the calculator I recommend to students who want a touchscreen experience similar to a smartphone. The 3.5-inch multi-touch color display supports pinch-to-zoom on graphs, which feels natural if you grew up swiping and tapping screens. It is the most modern interface of any calculator on this list.

The CAS system is robust, handling symbolic algebra, calculus, and equation solving with ease. With 256MB of flash memory, the Prime G2 can store programs, images, and data files that would overwhelm a TI-84. The brushed metal body and slide-on cover feel premium compared to the plastic build of most competitors.

Battery life from the rechargeable lithium-ion cell is solid, easily lasting a week of regular use between charges. The HP Prime Mobile App lets you mirror the calculator on your phone, which is handy for studying on the go. Dynamic geometry, advanced graphing, and spreadsheet applications round out a deep feature set.

The trade-off is the learning curve. If you are coming from a TI calculator, the HP interface will feel unfamiliar for the first few weeks. Some users report button responsiveness issues, and the Micro USB port is dated. At the premium end of the price range, it competes directly with the TI-Nspire CX II CAS.

HP Prime vs TI-Nspire CX II CAS

Both calculators offer CAS and color touchscreens, but the HP Prime wins on interface modernity with true multi-touch pinch-to-zoom. The TI-Nspire offers 3D graphing and deeper teacher support. Choose HP for the touchscreen experience, or TI if your school standardizes on the Nspire platform.

Who Benefits Most From the Prime

Engineering students, computer science majors, and anyone who values a smartphone-like interface will love the HP Prime. It is less ideal for students whose teachers only know TI calculators, because you will not get in-class help with the interface.

9. Texas Instruments TI-84 Evo – The Modern Refresh

The TI-84 Evo is Texas Instruments’ newest entry in the legendary TI-84 family, and I was excited to test whether it finally addresses the complaints users have had for years. The headline upgrades are USB-C charging, a processor three times faster than the CE, and a graphing display area 50 percent larger. Python programming support is also built in.

The icon-based home screen is a welcome change from the text menus of older TI-84 models. Navigation feels faster and more intuitive, especially for students new to graphing calculators. The modern button design has a crisp, satisfying press that improves the overall typing experience.

USB-C charging is the feature I have been waiting for. No more digging for a Mini-USB cable when every other device in your bag uses USB-C. The rechargeable battery holds a charge well, and the faster processor makes calculations and graphing noticeably snappier than the CE.

The compromises are frustrating for a premium-priced calculator. TI Connect CE software is not yet compatible, which limits computer connectivity at launch. There is an artificial speed limit on certain graphing commands that prevents the faster processor from reaching its full potential. The APPS button has also been removed, which may annoy long-time TI-84 users.

Is It Worth Upgrading From the CE

If you already own a TI-84 Plus CE, the Evo is a marginal upgrade rather than a must-have. USB-C and Python support are nice, but the higher price and software compatibility issues make it hard to justify for existing CE owners. New buyers should consider whether the premium is worth it over the proven CE.

Best Use Case for the Evo

The Evo is ideal for students buying their first graphing calculator who want modern features like USB-C and Python from day one. It is also appealing to tech-comfortable users who want the TI-84 ecosystem without the legacy connectivity limitations.

10. Texas Instruments TI-Nspire CX II – The Non-CAS STEM Pick

The TI-Nspire CX II is the non-CAS sibling of the CX II CAS, and it is the model I recommend for students who need advanced features but want ACT compliance. It shares the same color display, document-based interface, and Python coding support as the CAS version, just without symbolic algebra capabilities.

The document system is what sets the Nspire apart from the TI-84 family. You can create, save, and share calculation documents that combine graphs, tables, and notes in a single file. For long projects and lab reports, this workflow is a major productivity boost once you learn the interface.

Python coding support means students can write, test, and run Python programs on the calculator itself. This is increasingly relevant as more schools introduce coding into their math and science curricula. The trackpad navigation and dedicated alphabetical keyboard make data entry faster than on the TI-84.

The rechargeable battery lasts about two weeks on a charge with regular use, and the included student software mirrors the calculator interface on your computer. The learning curve is the main barrier, because the document-based approach is fundamentally different from the TI-84 menu system most teachers know.

Why Choose Non-CAS Over the CAS Version

The non-CAS CX II is ACT-approved, while the CAS version is not. If you plan to take the ACT, this is the model to get. You lose symbolic algebra, but everything else, including 3D graphing readiness, Python, and the document system, carries over from the CAS version.

Learning Curve and Support

Plan for a one to two week adjustment period when switching from a TI-84 to the Nspire platform. Texas Instruments offers extensive tutorials online, and the included student software helps bridge the gap. Once it clicks, the Nspire workflow is hard to give up.

Buying Guide: How to Choose the Best Graphing Calculator

Choosing from the best graphing calculators comes down to five key factors that directly affect your daily experience. I have broken down each one based on what actually matters in a classroom and on test day, not just what looks good on a spec sheet.

1. Exam Approval Is Non-Negotiable

The first thing to check is whether the calculator is approved for the exams you plan to take. The SAT, PSAT, AP, and IB exams allow most graphing calculators, including CAS models. The ACT bans calculators with CAS functionality, which means the TI-Nspire CX II CAS and HP Prime G2 are off the table for ACT test day. Always verify against the current College Board and ACT calculator policies before buying, because rules can change. Every model on this list clearly states its exam approval status so you can shop with confidence.

2. CAS vs Non-CAS: What Is the Difference

A CAS, or Computer Algebra System, lets a calculator solve equations symbolically rather than just numerically. That means a CAS calculator can factor polynomials, simplify radicals, and give you exact answers like square root of 2 instead of 1.414. CAS is incredibly powerful for calculus, linear algebra, and engineering courses. The catch is that CAS calculators are banned on the ACT. If you are not taking the ACT and you want maximum math power, choose a CAS model like the TI-Nspire CX II CAS or HP Prime G2.

3. Color Display vs Black and White

Color displays make it much easier to distinguish between multiple graphs plotted on the same screen. The TI-84 Plus CE, TI-Nspire CX II, Casio fx-CG100, and HP Prime all feature color screens that significantly improve readability. Black and white models like the TI-83 Plus and TI-84 Plus are still functional, but they require more mental effort to tell overlapping graphs apart. If your budget allows, a color display is worth the upgrade.

4. Battery Type and Battery Life

Rechargeable batteries are convenient and save money over time, but they require periodic charging. The TI-84 Plus CE, TI-Nspire CX II, TI-84 Evo, and HP Prime G2 all use rechargeable lithium-ion batteries that last one to two weeks per charge. AAA-powered models like the Casio fx-9750GIII and TI-83 Plus run for months on a set of batteries, which means you never have to remember to charge. If you are prone to forgetting chargers, AAA power is the safer choice.

5. Brand Ecosystem and Teacher Familiarity

Texas Instruments dominates American classrooms, which means teachers are most familiar with TI menus and keystrokes. If your teacher uses a TI-84 for demonstrations, buying a TI-84 model ensures you can follow along without translation. Casio calculators like the fx-9750GIII and fx-CG100 are excellent values, but they use different menu structures. HP calculators offer unique features but the smallest teacher support base. When in doubt, ask your teacher which model they recommend before buying.

6. Python Programming Support

Python is increasingly relevant as schools add coding to math and science curricula. The Casio fx-9750GIII, TI-Nspire CX II, TI-84 Evo, and Casio fx-CG100 all support Python programming directly on the device. If your coursework includes AP Computer Science Principles or any programming element, a Python-enabled calculator doubles as a learning tool.

7. Price-to-Value Analysis

Graphing calculators range from under $40 to over $160. The best value pick is the Casio fx-9750GIII at roughly half the TI-84 price with similar core functionality. The CATIGA CS-229 is the cheapest option for students on a tight budget who need basic graphing capability. Premium models like the TI-Nspire CX II CAS and HP Prime G2 cost more but offer advanced features that justify the price for STEM majors and engineering students.

FAQs

Final Thoughts on the Best Graphing Calculators

After testing all ten models, our top recommendation for most students remains the TI-84 Plus CE for its unbeatable combination of teacher support, exam approval, and color display. The Casio fx-9750GIII is the best value pick for budget-conscious families, while the TI-Nspire CX II CAS wins for advanced STEM coursework where symbolic math matters.

The best graphing calculators in 2026 balance power, ease of use, and exam compliance, and any model on this list will serve you well through high school and beyond. Pick the one that matches your class requirements and testing plans, and you will have a reliable tool for years to come.