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Casio

Casio FX-991ES Plus-2nd Edition Scientific Calculator

  • Based on 11,947 reviews
Condition: New
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Availability: Only 7 left in stock, order soon!
Fulfilled by Amazon
Arrives Wednesday, Sep 17
Order within 13 hours and 16 minutes
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Features

  • Redesigned ES PLUS series calculators featuring easy-to-understand Natural Textbook Display, Non-Programmable Scientific Calculator with 417 Functions
  • Stylish design but same function as Casio FX-991ESPLUS 1st edition, 10-digit mantissa + 2-digit exponential display
  • Basic Trigonometrical & Statistics Functions, and many more functions
  • Colour coded keypad for easy key differentiation, Simple and easy to use, Comes with new slide on hard case

Description

417 functions, Display: Natural Textbook Display, LCD (dot-matrix), 10 + 2 decimal places, Power supply: Solar & Battery, Basic Mathematical Functions, Table Generation, Base-n calculation, Scientific Constants, Vector, Basic Statistics, Differentiation, Non Graphing, Matrix, Equation, Integration, Complex number calculation, Comes with new slide-on hard case, Size (H x W x D): 11.1 x 77.0 x 161.5 mm, Weight: 95g

Brand: Casio


Color: Black


Calculator Type: Engineering/Scientific, Graphing


Power Source: Battery Powered


Screen Size: 4 Inches


Product Dimensions: 6.38 x 3.03 x 0.43 inches


Item Weight: 3.35 ounces


Item model number: FX-991ESPLUS-2WDTV


Batteries: 1 LR44 batteries required. (included)


Date First Available: February 17, 2020


Manufacturer: CASIO


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Sep 17

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Top Amazon Reviews

    • Reason why these are a standard
What can I say, it's a great calculator. The functions are pretty direct and there is a cheatsheet on the cover if you forgot how to access a function
Reviewed in the United States on May 17, 2025 by Kfett
    • Never made mistakes
Handy tool for all stem students.
Reviewed in the United States on May 29, 2025 by Yuean Zhang
    • Útil y de buena calidad
Excelente calculadora.
Reviewed in the United States on May 28, 2025 by David
    • Engineering Savior
Works for the FE exam, and I love the fraction to decimal function.
Reviewed in the United States on May 19, 2025 by Briana
    • surprisingly nice
UPDATE: I thought the U.S. version of this was the update to this model, the ClassWiz one with menus replacing some of the printed-on functions. That is indeed an update (but maybe to the EX versions rather than, or in addition to, ES versions? Because EX versions are discontinued). But actually the U.S. version of the 991ES is the Fx-115ES. I had thought that because of its lower number, it was just a lower-grade model. But in fact it is essentially the same as the 991ES with a few more capabilities and white instead of black. I like this calculator a lot so I wanted a "spare" plus it is nice to always have one of the two within easy reach, so I got the U.S. version as well. They are both similar high quality, just different colors. I am very pleased with these calculators. Previous review: I've used RPN HP calculators for years and didn't expect to enjoy or appreciate this non-RPN calculator as much as I do. The main reason I got it was that I found a couple of lovely calculator apps for Android that I figured out were supposed to mimic the 911 series Casio, and so I wanted the real thing. It has been easy and intuitive to figure out how to use. As someone else commented, this seems to be for Indian market so you probably won't have US warranty. But the US version is totally different; you have to access many of the functions through menus and they are not printed on/above the keys. But having them printed instead of having to access through menus is much more efficient once you learn where things are. The US menu version is maybe best for people who want to use the calculator briefly and/or don't want to bother learning it (like people used to a different brand). You might have to go to a non-US Casio site to find the pdf manual for the 991ES. It would have been nice to include a hard copy of the manual but these days that's rare, and I'm fine with this because it keeps prices down. US version is now ClassWiz which sadly replaced the 991 ES and 911 EX. So you have no choice but to get a non-US-market one if you want the ES or EX (but Amazon also sells a copy-cat version of the 911ES/EX from a different brand). As far as the hardware: The calculator has a nice look and feel. The plastic is premium and nice. The upper (smaller) keys feel nicer to me, especially as a (classic) HP user. The bottom (bigger) keys are a bit squishy but that's normal for most calculators. I like that there are no soft rubber keys or other soft parts (because soft plastics often get old and sticky and gross). The case goes on and off smoothly and does not scratch the calculator. I am glad I got this calculator and I'm sad that Casio is switching to a simplified look, menu-driven, version at least for the U.S. market. ... show more
Reviewed in the United States on March 15, 2024 by Ski9
    • Nice Calculator
It’s a nice calculator. It can be a little more difficult to remember all the functions. All in all it’s nice
Reviewed in the United States on December 29, 2024 by Mango
    • Great calculator!
Review Image by Skeefy1 Skeefy1
Functional calculator. Works well, it’s a good color and it’s pretty accurate, buttons are tactile and it’s fast at solving big problems
Reviewed in the United States on April 26, 2025 by Skeefy1 Skeefy1
    • Perfect
Omg I loved it too much,very helpful with good quality
Reviewed in the United States on May 1, 2025 by Doaa

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