Casio Advanced Scientific Calculator with 2-Line Natural Textbook Display (FX-115ES)

by Casio

Product Details

• Product Dimensions: 9.6 x 6.1 x 1.5 inches ; 8 ounces
• Shipping Weight: 1 pounds (View shipping rates and policies)
• Shipping: This item is also available for shipping to select countries outside the U.S.
• ASIN: B000A3IAHM
• Item model number: FX-115ES-S-IH
• Average Customer Review: 4.5 out of 5 stars  See all reviews (173 customer reviews)
• Amazon Best Sellers Rank:
  • #3 in Electronics > Office Electronics > Calculators > Scientific
  • #93 in Office Products > Office Supplies
• Date first available at Amazon.com: October 2, 2001

Product Description

Amazon.com Product Description

The Casio FX-115ES Advanced Scientific Calculator features over 279 functions and provides its user with everything they need for most mathematical calculations. The calculator's functions include complex number calculations, matrix and vector calculations, statistics, and 40 metric conversions. Its standout feature is its 2-line natural textbook display that displays fractions, formulas, square roots and other expressions as they would in your textbook. It is extremely versatile, and can be used in courses ranging from basic pre-algebra to calculus, and also has applications in physics, engineering, biology and statistics.

What's in the Box
FX-115ES scientific calculator, slide-on hard case, instruction manual, and quick reference guide.

Product Description

The Casio FX-115ES Advanced Scientific Calculator features over 279 functions and provides its user with everything they need for most mathematical calculations. The calculator's functions include complex number calculations, matrix and vector calculations, statistics, and 40 metric conversions. Its standout feature is its 2-line natural textbook display that displays fractions, formulas, square roots and other expressions as they would in textbook. It is extremely versatile, and can be used in courses ranging from basic pre-algebra to calculus, and also has applications in physics, engineering, biology and statistics.

Customer Reviews

Most Helpful Customer Reviews

155 of 161 people found the following review helpful:

5.0 out of 5 stars THE calculator for the FE! Do not get anything else!, September 18, 2009

By 

Tony (St. Louis) - See all my reviews

This review is from: Casio Advanced Scientific Calculator with 2-Line Natural Textbook Display (FX-115ES) (Office Product)

I failed the FE last semester. Yes, probably one of 5 who failed out of like thousands who did fine. Needless to say I'm ashamed. I was a last semester senior in civil with a completely overwhelming 18 hour schedule which I should have known was suicide. Plus many other personal life complications and interruptions. All that business led me to completely put off all studying for the FE thinking it would be a sinch. Plus, friends had said it wasn't that bad at all. Lesson learned. Study for this test! I will not allow myself to fail this test again. Unless you're a genius, do not put off the studying like I did. I'm a 3.5 gpa student.

I'm registered to take this test again this October. I'm now a grad student and my schedule is actually much more realistic. I have been studying with a partner 2-3 times a week, for several hours at a time. We help push each other when we we're stuck. We both have the giant FE review manual by lindebergh. Also, go to the NCEES site, print out the Reference Manual available in pdf at kinkos and have it bound there. It is vital to get to know your way around it.

CALCULATOR!!! I actually owned this Casio fx 115ES for my first time taking the FE. Though I had spent a little time getting to know it before the test, I have realized only recently that it was not near enough! I have vowed to know this thing inside and out and in the process I have realized that this may be the best calculator ever created.

I have used a TI-86 for years. I always loved the TI setup so I thought about getting one of TI approved models, but the fx-115ES was rated a lot higher and had better reviews than the other calculators permitted on the exam. I got it. It frustrated me for a while because it seemed so unlike the format of TIs. I thought I was comfortable enough with it for the test, but obviously I wasn't. I feel I'm a notoriously bad timed test taker. You should know absolutely everything about the ref manual you can and know every short cut on your calculator as possible. Each 4 hour segment moves way fast!

This semester I have actually been using the fx-115ES during classes and for all my homework. Discovering shortcuts that I had no idea existed. The display is amazing. I like seeing a fraction like how I would write it on paper and this calculator allows you to do that. In fact, you can put fractions in the numerator and denominator of a fraction! You can even put fractions in the next fractions! Does that make sense? It helps me immensely because I have realized I notoriously type things in wrong in calculators. If I get an answer that isn't one of the choices, I can press the navigation key and go back and look at everything I typed in and easily fix it. It is amazing. I have done that over and over.

You can enter constants (Avogadro's number, gravity, etc etc) and can convert units by using the little cheat sheet that is already glued on the inside of the sliding case. Figuring out how to quickly use that (which is not hard at all) is also an amazing help.

There is a genius little button that converts mixed numbers to decimal form. I know that it's in most calculators but it seems better on this one. There is also a button to convert to engineering (i.e. 10^-4). At my level of schooling, integrating and derivation are very quick and easy, but holy crap, I can do it even faster on this calculator! There are so many great little features in this calculator that you'll find yourself wondering why other calculators even exist. Because I don't need to do a lot of graphing anymore, I actually have switched so this is basically my sole calculator. I recommend everyone do this. I am beyond confident that I will slaughter the FE this time around.

And just to prove to you one more thing. I researched the hell out of the available TI calculators this summer. I got the one that I thought was the best and offered the most functions. TI-36Solar. Don't even bother. It is built way cheaper than the fx-115ES. It's only solar and I found that it had a hard time turning on and being seen in the middle of the day!!!! This is a huge issue as FE exam rooms can be very dim! The Casio is double powered and contrast is easily controlled! The buttons on the TI are inferiorly organized to the Casio.

LAST NOTE! DO NOT get the fx-115MS or ANY other model of the fx-115. My study friend after seeing me gush over this ES finally decided to get one. He accidently got the MS and to his horror, the display is only one line and with less functions. I cannot believe I have typed all this up. I think I'm just hoping to help people to not make the same mistakes I did.

77 of 79 people found the following review helpful:

5.0 out of 5 stars Use it to help you pass the P.E., October 27, 2006

By 

N. A Wheeler (Bronx, NY United States) - See all my reviews
(REAL NAME)   

This review is from: Casio Advanced Scientific Calculator with 2-Line Natural Textbook Display (FX-115ES) (Office Product)

I bought this calculator's distant ancestor six or seven years ago in College and loved it ever since. The old model was the first calc that gave you graphing calculator editing capabilities in a small calc package and it was a steal for the $12 or $14 I paid for it then. This new generation is nothing short of a quantum leap forward. For the first time you can enter equations exactly as you would write them. The font switches to a smaller size, so you can review the whole equation at once. It also has a solver funtion that is intuitive and quick; I used it all the time on open channel flow problems, or any equation that would require more than mild rearranging of terms. This may be the only calc on the PE approved list that has this ability.

Other high points:
* excellent battery life and solar ability
* Table function

Minor quibbles:
* you may have to slow down the pace when keying in as it will miss keystrokes if you type too fast
* you have to hit Shift to get to 'X' (alpha) or Pi
* when editing an equation, very slow to cursor to where you want

49 of 50 people found the following review helpful:

4.0 out of 5 stars First non-RPN calculator in years, June 4, 2007

By 

Joel Kolstad "Zimbo" (Portland, OR USA) - See all my reviews
(VINE VOICE)    (REAL NAME)   

This review is from: Casio Advanced Scientific Calculator with 2-Line Natural Textbook Display (FX-115ES) (Office Product)

I had an upcoming exam that specifically prohibited programmable calculators, so while I have quite the "stable" HP RPN machines, all of them were out. The FX-115ES was what I found as a substitute, and I'm quite impressed, especially for the price (which is $18 at Target, BTW). The machine works well and is quite feature-laden and easy to use -- I believe it is the most powerful non-programmable, non-graphing machine out there, and at a price where you can afford a few spares to spread around your home, office, car, etc. so that you don't have to worry about losing one.

I've had tons of calculators over time, with the Casio FX-4000P (back in the late '80s) being the first truly memorable one (my brother had an FX-7000G, the first graphing calculator). I switched to HPs in college, and I am still an RPN die-hard (I'm eagerly awaiting the release of the 30th anniversary HP-35s this summer!), but I can still appreciate a quality product such as this from Casio.