Manufacturer  Casio 

Brand  Casio 
Item Weight  3.35 ounces 
Product Dimensions  0.44 x 6.38 x 3.15 inches 
Item model number  FX115ESPLUS 
Batteries  1 LR44 batteries required. 
Is Discontinued By Manufacturer  No 
Color  Black 
Material Type  Plastic 
Number of Items  1 
Size  1Pack 
Lines Per Page  2 
Ink Color  black 
Manufacturer Part Number  fx115ESPlus 
National Stock Number  7420014124136 
FX115ESPLUS Casio FX115ESPLUS Scientific Calculator Black 1Pack 1
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 Perfect choice for high school and college students
 Natural Textbook Display is highly visible
 Protective hard case keeps calculator from being damaged
 Powered by solar power and features battery backup supply for reliable use
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This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.
From the manufacturer
Casio fx115ES PLUS Engineering/Scientific Calculator
Casio's latest and most advanced scientific calculator features new Natural Textbook Display and improved math functionality. FX115ES 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.
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Technical Details
Additional Information
ASIN  B007W7SGLO 

Customer Reviews 
4.7 out of 5 stars 
Best Sellers Rank  #61,336 in Office Products (See Top 100 in Office Products) #64 in Scientific Calculators 
Date First Available  November 1, 2011 
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FX115ESPLUS Casio FX115ESPLUS Scientific Calculator Black 1Pack 1
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Product Description
Advanced scientific calculator features Natural Textbook Display technology to show your mathematical expressions exactly as they appear in the textbook. Protective hard case keeps the calculator from being damaged while traveling. Calculator is powered by solar power and features a battery backup supply. Calculator is designed to be the perfect choice for students learning trigonometry, statistics, Algebra I and II, calculus, engineering, physics and more.
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Customer reviews
Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
Learn more how customers reviews work on AmazonReviewed in the United States on July 9, 2018

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CASIO FX115ES PLUS 16.24 (C)
CANON F792SGA 15.14 (N)
SHARP ELW516B (ELW516X 17.30) (S)
TI36X PRO 19.97 (T)
COMPLEX NUMBERS
C,N exact radical form
S can only be stored in M, division can not be entered as fraction
T does not require COMPLEX mode, must scroll to see all digits
STATISTICS/REGRESSION
C,N,S quadratic regression calculates both x1' and x2'
N calculates mode and range
S does not calculate min Q1 med Q3 max, easy to RCL vars and to calc x' & y'
T cubic regression, 2Var Stats menu includes x'(y) and y'(x) for linear reg
DISTRIBUTION
C,T normal, inverse normal, binomial, Poisson
N,S P(x) Q(x) R(x) x>t
BASE NUMBERS
N binary numbers displayed in blocks of 4digits
S can not +  * / different bases (no b o d h prefix/suffix), PEN (base 5)
T calculates LOGIC nand
POLYNOMIAL EQUATIONS
C,N 2nd degree (quadratic formula) exact radical form
C,T calculates vertex of parabola (S functions can be programmed)
N 4th degree polynomial (includes complex roots)
T gives option of storing results in variable memories
POLYNOMIAL INEQUALITY
C,N exact radical form of 2nd degree polynomial
N 4th degree polynomial
S,T no inequality
SYSTEMS OF EQUATIONS
C Infinite Solution & No Solution enunciators
N solves 4X4 system
S 4X4 matrices can solve 4X4 system using Inv(4X4)X(4X1)
S calculates determinant of Cramermethod denominator
T gives results of 2equation 3variable system in terms of z
FUNCTION TABLE
C 2 functions, f(x) & g(x) calculated sidebyside
N 1 function, f(x)
S no function table
T 1 function, Auto scrolls up or down from initial value of x
T x=? inputs user values for x (Auto is disabled)
MATRIX
C,T ref & reducedref
N, S 4X4 matrices, 4th matrix (matrix D)
N calculates adjoint matrix
S fill, cumulative, augment, random, matrix>list
N,S,T identity matrix
VECTOR
N 4th vector (vector D)
S no vector mode (uses LIST to calculate dot & cross products)
LIST
C,N no list mode
S 4th list (list 4), square, cube, reciprocal can be applied to lists
S sort A&D, fill, cum, difference list, aug, abs (sqrt of sqrsum)
S min max mean median sum product SD variance, list>matrix
T list formulas accept all calculator functions and real numbers
UNIQUE FEATURES
C VERIFY checks results of number & algebra expressions
C PreAns (PreAns + Ans generates Fibonacci Sequence)
C recurring decimal (gives ALL 60 digits of 1/61)
C remainder division (N,T have mod function)
C old FX115MS SOLVE did not require commavariable to select
C old FX115MS % could calculate percent + or  & percent change
C,N multistatements (displays all 6 answers of ambiguous case with =)
C old FX115MS could COPY multistatements
C,N independent memory M (generates & totals A or G sequence with =)
C,N Square Root & Ans require single keystroke (not Shift 2nd 2ndF ALPHA)
N RATIO solves 3rd or 4th term of direct proportion
N 38 math & science & engineering formulas
S DRILL quizzes & grades user on basic add, sub, mult, div
S % + or  (with single keystroke of %), (C,N,T % only changes % to decimal)
S Simpson's rule, N=1, exact & fast for 2nd & 3rd degree polynomials
S no Int, Mod, Prime Factors, PI (product of sequence), GCF, LCM
S GCF & LCM can easily be calculated with fraction button
S SOLVER only solves for X
S 4 formula memories, 4 definable memories, 4 constant (K) calculations
S CTLG gives complete catalog of all available functions for each mode
S OFF displays SHARP logo with name and telephone number of owner
S no parentheses for argument (X) = fewer keystrokes (log trig trigh R<>P)
S 9 Metric/Engineering Suffixes (femto  Tera)
T MultiTap Keys cycle through multiple functions when pressed (! nCr nPr)
T recall (RECALL VAR) displays menu of all 8 memory variables & stored values
T memory X can be accessed with a single keystroke
T setop & op Stored Operations (up to 44 characters) applied to ANS or entry
T can not clear old data with single keystroke (matrix, vector, poly, sys)
T no cube, cuberoot, independentmemory (M)
FRACTION DECIMAL CONVERSIONS
C S<>D (improper>repeating>decimal), shift a b/c<>d/c (mixed)
N F<>D (improper<>decimal), shift a b/c<>d/c (mixed)
S CHANGE (mixed number>improper>decimal), no shift, no menu
T f<>d (decimal<>improper), math menu 1:n/d<>Un/d (mixed)
T each conversion regarded as new calculation & bumps display upward
EXPRESSION EVALUATION: C,N CALC; S MATH, ALGB; T expreval
S does not accept complex numbers
INTERNAL DIGITS: C 15, N 20, S 14, T 13
CONSTANTS: C 40 (on cover), N 79, S 52, T 20
CONVERSIONS: C 40 (on cover), N 172, S 44, T 40
KEYSTROKES REQUIRED FOR SELECTED PROBLEMS
dms + dms = dms: C,N,S 8; T 35
polar rectangular conversion: C,N 15; S 3; T 18
linear regression & x'(y): C,N 15; S 9; T 23
braking test problem & y'(x): C,N 19; S 13; T 26
base numbers: C,N neg(FF) 8; S FF 4; T 2's(FF) 16
complex division: C,N 13; S 16; T 24 (requires scrolling)
cross product: C,N 24; S 35; T 36
Some features/qualities I love:
 The user interface is excellent. Much better than TI. I am faster on my calculator than all my friends with their expensive graphers. I can switch my calculator from real<>complex or radians<>degrees modes in two keystrokes.
 The price. super cheap.
 The capability. I can do matrix operations*, Phasor calculations, integration/derivation, vector math, series, base10 to binary (or hex, oct, basen), equation solver, etc.
 There is a library of 40 scientific constants. This was a life saver in modern physics when calculations involved 10+ different variables (masses and radii of different atomic particles, Planck's constant, speed of light, permittivity of vacuum, Bohr radius, Rydberg constant, electronvolt conversions) I probably saved 15 minutes of calculator entry time on the final exam because of this library. Physics students should have this.
 The battery life. My battery is still going strong, but more importantly, I'm never paranoid it will die in the middle of an exam because it has a little photovoltaic cell at the top.
 The unit conversions: There are 40 common unit conversions in a library. This is useful for all engineering classes in the U.S. (text books have half the examples in metric, and half in imperial units) but especially thermodynamics and fluids.
The output: When the output is a rational number, the calculator gives you the fractional form. This is great for derivations. One keystroke toggles between decimal and fraction. Alternatively, you can press the "Eng" button to get scientific notation in a multiple of 10^3. If i'm doing a problem with pressure (Pa) and I get the answer 26511900 Pa, one press of the Eng button tells me 26.5119x10^6. That 10^6 is my unit conversion (MPa) and the 26.5 is my answer.
Some things I wish it did better:
 * Matrix math is limited to 3x3 matrices. This is a bummer. Often I need at least 4x4 for simple FEA problems.
 when entering a really long calculation with ~90 characters, the entry gets slow (the memory is limited)
Schools love to push the TI as the standard, but that does not mean it is the best calculator. I was a lifelong TI user until I bought this Casio. I only break out my TI to do big matrices. I can attest that this Casio has improved my experience in every class I have taken since buying it.
Top reviews from other countries
TLDR:
This is by far the best calculator I’ve had, it’s super easy to use and a great experience to use. It’s really nice to have the save functions (A, B, C, and so on). The cover is good to have as well, with extra functions on it. It’s accepted in most tests and exams (only one I wasn’t able to use t for was accounting, where we were only allowed a simple addition, multiplication, subtraction and divisions calculator). The keys are super tactile really nice to type and use. Overall, if you don’t lose this one, it will be a companion for many years!
Before going into pros and cons, I wanted to note that a friend of mine saw me using this and how easy and straight forward I solved finance problems in seconds (mind you I have used it for a long time, so it is second nature for me) he asked me to order one for him to replace his calculator! So I think that speaks wonders on how impressive and handy this calculator is! After all, it’s the best calculator I own!
Pros:
 Good screen. I have had no issues reading this screen both indoors and out (after exams discussing questions) in all kinds of light scenarios.
 Great calculator. I owned many prior to buying this and never had any issues with them! They were super long lasting, the only time I needed to replace them was when I misplaced them or a friend I loaned it to lost it!
 Good build. This is made with plastic, but let me tell you it is not by any means cheap feeling/looking. I’ve really enjoying using it and it feels great I the hand in terms of size.
 Super easy to use. This is one of the few calcs that has a fraction function (see photo  ps: equation in photo is [(12/6)/6]). This makes many equations super easy to use. Also, the alpha save function allows you to carry exact answers in further calculations, super handy!
 Long lasting battery. Like I said, I never needed to replace any so as far as I’m concerned, with regular everyday use this battery is super long lasting!
 Great price. In terms of function per dollar, I have not found any better replacements for this.
Cons:
 Not a graphing calculator. For my engineering friends, this won’t fit your needs... but that’s more on you needing more of a calculator than the average person, not the calculator itself!
 It’s so good... I’ve had a few friends borrow some of my older ones and they got ‘lost’... only a few months later to see them use it. So be aware! This may be taken if you don’t keep an eye on it... for me this was a pro  it let me know who my true friends are! No real friend will steal from you.
I hope my review was helpful for you to know if this calculator is a good fit for your needs!
Reviewed in Canada 🇨🇦 on October 28, 2017
TLDR:
This is by far the best calculator I’ve had, it’s super easy to use and a great experience to use. It’s really nice to have the save functions (A, B, C, and so on). The cover is good to have as well, with extra functions on it. It’s accepted in most tests and exams (only one I wasn’t able to use t for was accounting, where we were only allowed a simple addition, multiplication, subtraction and divisions calculator). The keys are super tactile really nice to type and use. Overall, if you don’t lose this one, it will be a companion for many years!
Before going into pros and cons, I wanted to note that a friend of mine saw me using this and how easy and straight forward I solved finance problems in seconds (mind you I have used it for a long time, so it is second nature for me) he asked me to order one for him to replace his calculator! So I think that speaks wonders on how impressive and handy this calculator is! After all, it’s the best calculator I own!
Pros:
 Good screen. I have had no issues reading this screen both indoors and out (after exams discussing questions) in all kinds of light scenarios.
 Great calculator. I owned many prior to buying this and never had any issues with them! They were super long lasting, the only time I needed to replace them was when I misplaced them or a friend I loaned it to lost it!
 Good build. This is made with plastic, but let me tell you it is not by any means cheap feeling/looking. I’ve really enjoying using it and it feels great I the hand in terms of size.
 Super easy to use. This is one of the few calcs that has a fraction function (see photo  ps: equation in photo is [(12/6)/6]). This makes many equations super easy to use. Also, the alpha save function allows you to carry exact answers in further calculations, super handy!
 Long lasting battery. Like I said, I never needed to replace any so as far as I’m concerned, with regular everyday use this battery is super long lasting!
 Great price. In terms of function per dollar, I have not found any better replacements for this.
Cons:
 Not a graphing calculator. For my engineering friends, this won’t fit your needs... but that’s more on you needing more of a calculator than the average person, not the calculator itself!
 It’s so good... I’ve had a few friends borrow some of my older ones and they got ‘lost’... only a few months later to see them use it. So be aware! This may be taken if you don’t keep an eye on it... for me this was a pro  it let me know who my true friends are! No real friend will steal from you.
I hope my review was helpful for you to know if this calculator is a good fit for your needs!
1. Can do complex numbers/integrals/polar<>rec quickly (in rads and degrees)
2. Small and compact.
3. Less than 100$
4. Approved for University Tests.
This calculator meets all of those criteria and its only 25 CDN $! A very good purchase for me. This calculator should be sufficient for everything you need from basic calculations to more difficult ones.
There are a few other calculators you could buy for a bit less, but trust me this one is well worth the few extra $$ and you dont have to spend 50$ +.
The button locations are fairly intuitive, and the display is easy to read (can be toggled). Answers are defaultly given in fractions if possible, and very easy to change to decimals.
The only negative side is it erases all memory even turned off. Other than that, best calculator ever!
i can do work in degrees as well as radians with ease
vectors and matrices are a breeze on this thing, my only complaint is that i wish the matrices and vectors would display in exact form instead of decimals, eg. √3/2 instead of 0.866, but i guess once you work with them enough you get to know what decimals correspond with what root fractions
solves complex derivatives and integrals, but it does take a few seconds for it to compute them