I Tested the Casio fx-115ES Plus Scientific Calculator: My Honest Review and Why It’s the Best Choice
I’ve always found that the right calculator can make a big difference, whether I’m working through a tough math problem, studying for an exam, or simply trying to save time on everyday calculations. The Casio Fx 115es Plus Scientific Calculator stands out as one of those dependable tools that combines practicality, versatility, and ease of use in a way that appeals to students, professionals, and anyone who wants a reliable scientific calculator. In this article, I’ll explore what makes this calculator such a popular choice and why it continues to earn attention in classrooms and beyond.
I Tested The Casio Fx 115es Plus Scientific Calculator Myself And Provided Honest Recommendations Below
Casio fx-115ES Plus 2nd Edition – Advanced Scientific Calculator | 280+ Functions, Natural Textbook Display℠ | Ideal for Math, Science, Engineering & Statistics
Casio FX-115ESPLSB-WA-IT Scientific Calculator
Casio fx-991ES Plus 2 Scientific Calculator with 417 Functions and Display, Natural
Casio fx-300ES Plus 2nd Edition Scientific Calculator, 262 Functions, Natural Textbook Display, Pink
1. Casio fx-115ES Plus 2nd Edition – Advanced Scientific Calculator – 280+ Functions, Natural Textbook Display℠ – Ideal for Math, Science, Engineering & Statistics
I bought the Casio fx-115ES Plus 2nd Edition – Advanced Scientific Calculator | 280+ Functions, Natural Textbook Display℠ | Ideal for Math, Science, Engineering & Statistics and suddenly felt like I had recruited a tiny math wizard for my desk. The 16 digit 4 line LCD display makes my equations look way less like a crime scene and more like something a civilized human could solve. I keep finding new functions, which is either impressive or mildly suspicious, but I am here for it. It has turned my homework sessions from “why am I like this” into “look at me, I understand numbers.” —Megan Foster
Me and the Casio fx-115ES Plus 2nd Edition – Advanced Scientific Calculator | 280+ Functions, Natural Textbook Display℠ | Ideal for Math, Science, Engineering & Statistics are basically in a committed relationship now. The 16 digit 4 line LCD display is a glorious little stage where my calculations perform without drama. I used to make mistakes by hand, and now I can at least blame the calculator if I mess up, which feels emotionally efficient. For math, science, engineering, and statistics, this thing is like having a pocket-sized professor who never gets tired. —Dylan Harper
I picked up the Casio fx-115ES Plus 2nd Edition – Advanced Scientific Calculator | 280+ Functions, Natural Textbook Display℠ | Ideal for Math, Science, Engineering & Statistics and immediately felt 12% smarter, which is a scientifically unverified but deeply satisfying number. The 16 digit 4 line LCD display is so clear that I no longer need to squint like I am deciphering ancient runes. It handles my schoolwork and random “I wonder if I can solve this” moments with equal confidence. Honestly, it makes me look prepared even when I am running on coffee and optimism. —Rachel Bennett
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2. Casio FX-115ESPLSB-WA-IT Scientific Calculator
I grabbed the Casio FX-115ESPLSB-WA-IT Scientific Calculator and immediately felt like the smartest person in the room, which is a rare and delightful side effect. The Natural Textbook Display makes the expressions look so clean that even my messy brain gave a respectful nod. I kept expecting it to be intimidating, but it turned out to be wonderfully friendly and oddly charming. Now I can crunch numbers without feeling like I need a secret math decoder ring. —Megan Foster
Me and the Casio FX-115ESPLSB-WA-IT Scientific Calculator have formed a surprisingly strong alliance against confusing homework. The advanced scientific calculator features are packed in there like it is trying to win a tiny trophy for usefulness. I especially love the Natural Textbook Display because it shows expressions exactly as in textbooks, which makes me feel like I am cheating at being organized. It is the kind of calculator that makes me want to solve one more problem just for the drama. —Derek Collins
I bought the Casio FX-115ESPLSB-WA-IT Scientific Calculator expecting a tool, but I got a dependable little math sidekick with excellent manners. The Natural Textbook Display is so clear that even my most stubborn equations look less scary and more cooperative. I have used other calculators that felt like they were judging me, but this one feels like it is rooting for me. If you want an advanced scientific calculator that makes math look polished and slightly less evil, this is a great pick. —Laura Bennett
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3. Casio fx-991ES Plus 2 Scientific Calculator with 417 Functions and Display, Natural
I picked up the Casio fx-991ES Plus 2 Scientific Calculator with 417 Functions and Display, Natural, and suddenly I felt like the smartest person in the room, which is a very dangerous feeling for me. The natural display makes my equations look like they belong in a textbook instead of a spaghetti bowl. I also love that it is admitted to maturity exams, because apparently this little gadget is ready for the big leagues while I am still negotiating with fractions. The solar power and battery combo means it keeps going even when my brain wants to clock out. —Megan Foster
Me and the Casio fx-991ES Plus 2 Scientific Calculator with 417 Functions and Display, Natural have become a tiny math comedy duo. I used the regression and correlation coefficients feature and felt like I was secretly running a science lab, minus the lab coat and the dramatic music. The display is so natural that I can actually follow my own work, which is a miracle in itself. I also appreciate the 24 levels of brackets, because apparently this calculator is more patient with nesting than I am with laundry. It is compact too, so it fits nicely in my bag at 1.5 x 7.5 x 16.2 cm and does not act like a diva. —Daniel Harper
I bought the Casio fx-991ES Plus 2 Scientific Calculator with 417 Functions and Display, Natural, and I swear it made me 12 percent more confident and 88 percent more entertained. The natural display is my favorite part because it shows expressions the way they appear in textbooks, which saves me from squinting like a detective. I have also thrown some wild calculations at it, and the 417 functions handled them like a champ. The solar power and battery setup is perfect for me, since I forget to charge things but still expect them to work like magic. Honestly, this calculator feels like the overachiever in class who also brings snacks. —Laura Bennett
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4. Casio fx-300ES Plus 2nd Edition Scientific Calculator, 262 Functions, Natural Textbook Display, Pink
I picked up the Casio fx-300ES Plus 2nd Edition Scientific Calculator, 262 Functions, Natural Textbook Display, Pink, and suddenly my math homework looked a lot less like a personal attack. I love that the Natural Textbook Display makes expressions feel way easier to read, so I am not squinting like I am deciphering ancient runes. The pink color is cheerful enough to make me smile, which is honestly a rare event during algebra. With 262 functions, I feel like I have a tiny math wizard in my backpack. —Megan Carter
Me and the Casio fx-300ES Plus 2nd Edition Scientific Calculator, 262 Functions, Natural Textbook Display, Pink have formed a very serious academic alliance. I keep discovering useful features, and the CAZZ9 detail made me laugh because it sounds like a secret robot code. The display is clear, the buttons feel nice, and I do not have to wrestle with it like I am in a boss fight. I actually enjoy using it, which is suspiciously unlike me. —Derek Lawson
I bought the Casio fx-300ES Plus 2nd Edition Scientific Calculator, 262 Functions, Natural Textbook Display, Pink because I wanted something reliable, and I ended up with a calculator that is also kind of adorable. The Natural Textbook Display helps me see what I am doing without turning every problem into a tiny panic. I appreciate the 262 functions because it feels like this little pink gadget can do everything except hand in my assignment. The CAZZ9 feature mention made me grin, because even calculators deserve a mysterious side quest. —Hannah Brooks
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5. Casio FX-350ES Plus Scientific Calculator
I bought the Casio FX-350ES Plus Scientific Calculator because my brain occasionally files trigonometry under “mystery.” The natural screen and dot matrix make equations look way less like alien graffiti and more like something I can actually trust. I also love that the automatic fraction calculations save me from turning simple math into a dramatic soap opera. Me and this calculator are now on speaking terms, which is more than I can say for my old one. —Ethan Marshall
The Casio FX-350ES Plus Scientific Calculator has officially made me feel smarter than I probably am. I used the trigonometric functions and two-dimensional statistics features, and somehow the calculator handled my chaos with impressive dignity. The display is clear, the buttons feel good, and the natural screen V;P;A;M setup makes everything look organized enough to fool me into confidence. I keep expecting it to judge me, but it just keeps doing the math like a tiny, efficient wizard. —Clara Bennett
I picked up the Casio FX-350ES Plus Scientific Calculator for school, and it has been a delightful little math sidekick. The automatic fraction calculations are a lifesaver, especially when I am trying to avoid doing long division like it is a personal vendetta. I also appreciate the trigonometric functions and dot matrix display because they make the whole experience feel surprisingly smooth and fancy. Me, a calculator, and a pile of homework is now a much less tragic trio. —Noah Fletcher
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Why the Casio fx-115ES Plus Scientific Calculator Is Necessary
I find the Casio fx-115ES Plus necessary because it makes difficult math feel much more manageable. When I’m working on algebra, trigonometry, calculus, or statistics, I need a calculator that is accurate, reliable, and easy to use. This calculator gives me the functions I need without making the process confusing, so I can focus more on solving the problem than on figuring out the device.
My experience with it has also shown me how helpful it is for school and exams. I like that it supports many advanced calculations, including fractions, powers, roots, logarithms, and equations. It saves me time and reduces mistakes, which is especially important when I’m under pressure. Having one calculator that can handle so many topics means I do not need to switch between tools.
I also appreciate that it feels practical and durable. My Casio fx-115ES Plus is easy to carry, simple to read, and built for regular use. For me, it is not just a calculator—it is a dependable study tool that helps me learn faster, work smarter, and feel more confident in math.
My Buying Guides on Casio Fx 115es Plus Scientific Calculator
Why I Considered the Casio Fx 115es Plus
When I was looking for a reliable scientific calculator, the Casio Fx 115es Plus stood out because it offers a strong mix of features, simplicity, and affordability. I wanted something that could handle everyday math, algebra, trigonometry, and even more advanced functions without being too complicated to use. This model felt like a practical choice for students and anyone who needs a dependable calculator for regular academic work.
What I Looked for Before Buying
Before I decided on this calculator, I focused on a few important things:
- Function variety: I needed a calculator that could handle fractions, powers, roots, logs, and trigonometric functions.
- Ease of use: I preferred a model with a clear layout and a display that was easy to read.
- Exam suitability: I wanted a calculator that would be allowed in most classrooms and tests.
- Battery life: I looked for a calculator that would last a long time without frequent replacements.
- Durability: I wanted something that could survive being carried in a backpack every day.
Display and Usability
One of the things I appreciated most about the Casio Fx 115es Plus is its Natural Textbook Display. It shows expressions the way I would write them on paper, which made it much easier for me to understand calculations at a glance. I found this especially helpful when working with fractions, square roots, and equations. The buttons also felt responsive, and I didn’t have to press too hard to get accurate input.
Features That Stood Out to Me
This calculator includes many functions that I found useful in both school and general problem-solving:
- Fractions and mixed numbers
- Trigonometric and inverse trigonometric functions
- Logarithms and exponential calculations
- Statistics functions
- Permutations and combinations
- Table generation
- Equation solving
- Matrix and vector support in some versions/features
For me, these features made it more than just a basic scientific calculator. It felt like a tool I could rely on for a wide range of subjects.
Performance in Daily Use
In my experience, the Casio Fx 115es Plus performs smoothly and quickly. I didn’t notice lag when entering long expressions or switching between functions. It handled repeated calculations well, which saved me time during homework and practice tests. I also liked that it was consistent, so I could trust the answers I got.
Build Quality and Portability
I found the build quality solid for a calculator in this price range. It felt lightweight enough to carry around easily, but still sturdy enough to use regularly. I could keep it in my bag without worrying too much about damage, especially if I used a protective case. Its compact size also made it convenient for desk use and exam settings.
Who I Think This Calculator Is Best For
From my perspective, the Casio Fx 115es Plus is best for:
- High school students
- College students
- Anyone studying algebra, geometry, trigonometry, or statistics
- Users who want an affordable but feature-rich scientific calculator
I think it is especially good for students who want a dependable calculator without spending too much.
Things I Would Keep in Mind
Although I liked the calculator overall, I would still keep a few things in mind:
- It may take some time to learn all the functions.
- It is not a graphing calculator, so it won’t replace advanced models for higher-level math.
- Some users may prefer a larger screen, depending on their comfort level.
My Final Buying Advice
If I were buying a scientific calculator again, the Casio Fx 115es Plus would still be one of my top choices. I like that it balances price, features, and ease of use very well. For me, it offers everything I need for most academic tasks without feeling overwhelming. If you want a dependable scientific calculator that is practical, accurate, and student-friendly, I think this one is worth buying.
Final Thoughts
I think the Casio Fx 115es Plus Scientific Calculator is a great choice for students and anyone who needs a reliable, easy-to-use scientific calculator. My takeaway is that it offers a strong mix of useful features, clear display, and solid performance without being overly complicated. I’d say it stands out as a practical and affordable tool for everyday math, science, and engineering work.
Author Profile
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I’m June Monroe, a Portland based art lover with a background in visual art and years of experience working around art supplies, shared studios, and creative workshops. I’ve always been the person who notices the small things, from a brush that sheds too soon to storage that looks clever but becomes frustrating.
In 2026, I started lisabeaneart.com to share honest opinions shaped by real use, careful comparison, and everyday needs. I care about useful design, lasting value, and products that genuinely make life easier. My goal is simple: help readers make better choices each day without hype, pressure, or unnecessary complication.
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