Casio fx-115ES Plus 2nd Edition – Advanced Scientific Calculator | 280+ Functions, Natural Textbook Display℠ | Ideal for Math, Science, Engineering & Statistics
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Availability:
In Stock.
Arrives
Saturday, Jun 27
Style: Calculator
Features
- 16 digit 4 line LCD display
- NATURAL TEXTBOOK DISPLAYSM View fractions, equations, and results exactly as they appear in your textbook, simplifying the interpretation of complex math.
- OVER 280 FUNCTIONS Includes advanced capabilities like complex number calculations, linear regression, summation (), integration (), permutations and combinations, polar-rectangular conversions, and matrix/vector operations.
- MULTI-REPLAY FUNCTION Backtrack through your calculations, edit expressions, and recalculate answers step-by-step for easy error checking.
- EXTENSIVE SCIENTIFIC & MATH FUNCTIONS Solve simultaneous equations, quadratic and cubic equations, and explore advanced topics and classes like Trigonometry, Pre-Calculus, Calculus I or II, Physics, Statistics, or other college-level courses.
- SOLAR PLUS WITH BATTERY BACK-UP Reliable power with energy-efficient Solar Plus technology and battery back-up to keep you working without interruption.
Description
Casio's advanced scientific calculator features new Natural Textbook Display and improved math functionality. FX-115ES PLUS has been designed to be the perfect choice for high school and college students learning General Math, Trigonometry, Statistics, Algebra I and II, Calculus, Engineering, Physics.
Brand: Casio
Color: White
Calculator Type: Engineering/Scientific
Power Source: Solar Powered
Screen Size: 6.5 Centimeters
Calculator Type: Engineering/Scientific
Power Source: Solar Powered
Screen Size: 6.5 Centimeters
Number of Batteries: 1 LR44 batteries required. (included)
Display Type: LCD
Color: White
Enclosure Material: Plastic
Item Dimensions L x W: 9"L x 5.5"W
Brand: Casio
Model Name: FX-115ESPLS2
UPC: 889232609690
Global Trade Identification Number: 90
Manufacturer: Casio
Mfr Part Number: FX-115ESPLS2
Model Number: FX-115ESPLS2
Item Weight: 6.05 Ounces
Item Type Name: Advanced Scientific Calculator
Warranty Description: 1 year limited parts & labor
Unit Count: 1.0 Count
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Saturday, Jun 27
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Style: Calculator
The Casio fx-115ES Plus 2nd Edition is an excellent scientific calculator for students taking algebra, calculus, physics, or engineering courses. The Natural Textbook Display makes fractions, roots, and equations easy to read exactly as they appear in textbooks. It has a wide range of functions while still being simple to use once you learn the layout. The calculator feels durable, responsive, and reliable for both homework and exams. Overall, it’s a great value for anyone needing a powerful non-graphing scientific calculator.
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Reviewed in the United States on May 8, 2026 Reviewed in the United States on May 8, 2026 by Sarah
Style: Calculator
The Casio fx-115ES Plus 2nd Edition is an excellent calculator and definitely worth the purchase if you’re a student or someone who works with math or science regularly. It feels solid and well-built, with responsive buttons that make typing fast and accurate. The Display is a huge plus because it shows fractions, roots, and equations exactly how they look in a textbook, which makes checking your work much easier. I’ve used it for calculus, physics, and statistics, and it handles all the functions I need with no issues. The menu layout is intuitive once you get used to it, and the battery life seems great so far. Overall, it’s reliable, easy to use, and perfect for both school and professional use. I'd say its a must-have for anyone serious about math or science.
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Reviewed in the United States on October 27, 2025 by Here2Help
Style: Calculator
THIS CALC IS AMAZING. for the price it is the best calculator at its price point without a doubt. I had always used Texas Instruments as they were always pushed in the schools. But this calculator is way better. This calculator can do everything a ti30 can do and more. It does derivatives and it works extremely well. You can get the value of an integral with this. You can use it for literally anything (up to calculus I and some of calculus II). If you don't want to spend a bunch of money for a calculator and wont be taking any crazy MATH classes, this is definitely the calculator to get. it is suitable in almost all normal math classes and the display is good enough. The display isn't crazy bright or anything but its less than 20 bucks so as long as you are in a lit room you should be fine.
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Reviewed in the United States on May 1, 2026 by Amazing drive
Style: Calculator
Great functionality, solid case (survives being dropped). Cute colors and lots of easily utilized functions. Arrived in perfect condition. Good value for the price for college classes.
Reviewed in the United States on May 6, 2026 by Lucy Ross
Style: Calculator
It is very much worth the money I paid for it. This calculator worked well for my 9th grade geometry class but it will not be suitable for my tenth grade algebra. The color is very sleek and I really like it but the quality is just a cheap kind of plastic across the whole thing. It is durable and the display is clear as day. Also, it has very good battery life, I didn't have to replace it for a year and I don't plan of having to.
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Reviewed in the United States on June 6, 2025 by Jada Haupt
Style: Calculator
This is a first impression, as I learn more, I'll add info. I chose this calculator because I needed more memories/variables for storing often-used constants for chemistry courses. It gives you the following memory/variables for quick recall/use: A,B,C,D,E,F,X,Y,M, looks like 9 memories. There are also 40 built-in scientific constants which are less easy to retrieve (shift,const then 01, 02, etc.) but might be handy (of course you can save selected ones in the memory/variables for easier access). Visibility is always an issue with calculators, both keypad glare and screen angle. Compared to a very basic TI-30Xa calculator, the Casio screen is less readable because the digits are smaller and much less contrast (blue on bluish screen vs black on white/gray for TI). As with most reflective LCD screens, including the TI, you have to get the light angle just right for maximum viewing. This is a significant problem I find because lighting varies a lot in different places. Under exam pressure, you can't afford to misread, but it can happen too easily with these screens. But the TI is easier to read - however, it is just a one-number at a time display. The Casio shows your whole formula as you type it, so for that feature you pay a price with less clarity. With the Casio, if I get the light angle best for the display, I tend to get glare on the buttons. The TI has the same issue, but the buttons are bigger and bolder and black/white, so more readable. I chose the white model Casio to see if somehow it is clearer. The numeric pad is white on gray buttons, which is pretty, but not as readable as white on black for sure. I may get the black model to see if that is clearer (actually not sure a black model is available for this exact version). My eyesight is not perfect, so this may be a non-issue for you, especially young people. I just find that the number of hours spent calculating and reading small text is a factor, so I'm trying to optimize eye strain to a minimum and evaluate study tools in that context. Otherwise, I think this Casio fx-115ES Plus is packed with a ton of powerful features and is a great value from that standpoint. Update 9/9/2022 - a feature I miss on this calculator is the "change sign" button, which flips the result from positive to negative or vice-versa. You can multiply by -1, but it feels cumbersome. Because this calculator enters whole expressions instead of one-number-per-operation like simple calculators, you may not have as much need for the "change sign" function. For me, it is natural and I often like to see partial results as I go. So if the calculation is for example: 66 / (1 - (grams / molar mass)), it is natural for me to first calculate grams / molar mass (showing me the moles of a substance), then "Change Sign" and add 1, then invert the answer and X 66. So "change sign" and "invert" go hand-in-hand for doing a computation "from the inside out" with minimum parentheses. It is also a useful skill in case you find yourself with a simple calculator on occasion. The Casio has the (-) key, but as yet I haven't found it more useful than the minus key. Maybe someone can explain it, the manual doesn't elaborate. Update: somehow I missed the "Ans" button next to the "=" key. So not a single button push, but the "-" button followed by the "Ans" button will invert the sign of your answer and you can proceed from there. Also, the Ans button is needed for taking a function of your last answer, such as log(), etc. (unlike simpler calculators where log always takes log of last calculation). And "alpha" "Ans" will get you the "pre-answer", the answer before the last answer. So there is a two-memory stack at work for the answers. Update: another real weakness of this calculator is there is no (that I know of) quick way to change from fixed point to scientific notation. This is standard on many very basic scientific calculators. You can go through a cumbersome mode shift with shift keys, selecting precision, yada, but a single dedicated key is what is needed. If you have .00612 and want to quickly see it as 6.12x10^-3 or vice versa -- forget it. I think that is a serious omission, and hopefully there is another brand out there with that useful key for my next calcluator. Too bad.
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Reviewed in the United States on September 5, 2022 by developer1
Style: Calculator
The Casio fx-115ESPLUS2 2nd Edition has proven to be an invaluable tool for my girlfriend as she embarks on the journey of her Ph.D. program in Clinical Psychology at LSU in Baton Rouge, Louisiana. Purchased to support her academic endeavors, this calculator's sleek and compact design makes it easy to carry to classes, research meetings, or wherever her studies take her. Its versatility shines through in handling various mathematical tasks, from basic arithmetic to intricate statistical analyses required for her clinical psychology research. The calculator's functionality extends beyond mere numbers; it excels in dealing with complex algebraic expressions and matrices, providing a comprehensive solution for her coursework and research needs. The equation solver feature has been particularly handy, saving her time and effort in solving intricate equations. The user-friendly interface of the fx-115ESPLUS2 has made it accessible for someone with a busy academic schedule. Its intuitive design allows her to focus on the calculations at hand rather than wrestling with the device itself. Moreover, the calculator has played a crucial role during exams, with its approved status in various academic settings ensuring confidence in both regular coursework and high-stakes assessments such as final exams. As she progresses in her Ph.D. journey, set to graduate from her program in the spring of 2028, the Casio fx-115ESPLUS2 continues to be a trusted companion, adapting to the evolving complexity of her academic challenges. Its reliable performance, advanced features, and portability make it an essential tool for any Ph.D. candidate, especially in a program as rigorous as clinical psychology. In summary, the Casio fx-115ESPLUS2 2nd Edition is not just a calculator; it's a versatile and reliable partner in academic excellence. Whether you're a Ph.D. candidate in clinical psychology or any other field, this calculator proves to be an indispensable asset, offering precision, efficiency, and ease of use.
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Reviewed in the United States on November 25, 2023 by Kevin Fanning
Style: Calculator
I use this for my classes the display quality is nice. The size and value of money is great. Helps me in math
Reviewed in the United States on March 12, 2026 by Justin Guan