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Casio FX-991ES vs Casio FX-991EX

3.15 in
0.48 in
Casio FX-991ES Calculator
Casio FX-991ES
3.03 in
0.44 in
Casio FX-991EX Calculator
Casio FX-991EX
Available colors
User rating
158
3.3 out of 5
158 user ratings
5 stars
25 %
4 stars
15 %
3 stars
32 %
2 stars
18 %
1 stars
6 %
318
3.3 out of 5
318 user ratings
5 stars
20 %
4 stars
18 %
3 stars
42 %
2 stars
12 %
1 stars
5 %

Full Comparison

Technical details

Casio FX-991ESCasio FX-991ES
Casio FX-991EXCasio FX-991EX
TypeScientific calculatorScientific calculator

Design

Casio FX-991ESCasio FX-991ES
Casio FX-991EXCasio FX-991EX
Colour of product
  • Silver
  • White
  • Black
  • Black,White
Control typeButtonsButtons
Form factorPocketPocket

Dimensions

Casio FX-991ESCasio FX-991ES
Casio FX-991EXCasio FX-991EX
Width3.15 in3.03 in
Height0.48 in0.44 in
Depth6.34 in6.52 in
Weight3.7 oz3.17 oz

Display

Casio FX-991ESCasio FX-991ES
Casio FX-991EXCasio FX-991EX
Number of characters per line1216
Number of display lines22
Display typeDot-matrixLCD
Display tiltingnono
Second displaynono
Display lightnono

Connectivity

Casio FX-991ESCasio FX-991ES
Casio FX-991EXCasio FX-991EX
Data transfernono

Features

Casio FX-991ESCasio FX-991ES
Casio FX-991EXCasio FX-991EX
Complex functionsyesyes
Equation solveryesyes
Matricesyesyes
Statistical functionsyesyes

Power

Casio FX-991ESCasio FX-991ES
Casio FX-991EXCasio FX-991EX
Power source
  • Solar
  • Battery
  • Solar
  • Battery
Battery operatedyesyes
Battery typeAAALR44
External power connectionSolar cell
  • Solar cell
  • External source

Pros & Cons

Pros
      Cons

          Casio FX-991ES vs Casio FX-991EX - User Opinions

          • mina
            over 1 year ago
            Both the Casio fx-991ES and fx-991EX are scientific calculators with a range of functions and features that are suitable for use in math and science classes. The main difference between the two models is in their display and functionality. The fx-991EX has a 12-digit display, while the fx-991ES has a 10-digit display. The fx-991EX also has additional functions and features, such as a solver function, a matrix and vector function, and a statistical function, that are not available on the fx-991ES. In terms of programming capability, the fx-991EX can be programmed, allowing users to create their own custom functions and programs, while the fx-991ES does not have this capability. In terms of cost, the fx-991EX may be more expensive due to its additional features and capabilities.
          • robt_hand
            over 1 year ago
            The Casio fx-991ES and fx-991EX are both advanced scientific calculators that are suitable for use in a variety of math and science classes. While they have many similarities, there are a few key differences between the two models. Firstly, the fx-991EX has a larger, 12-digit display, while the fx-991ES has a 10-digit display. Additionally, the fx-991EX has a range of advanced functions and features, such as a solver function, a matrix and vector function, and a statistical function, that are not found on the fx-991ES. Finally, the fx-991EX can be programmed, allowing users to create their own custom functions and programs, while the fx-991ES does not have this capability. Overall, the fx-991EX is a more advanced and feature-rich calculator than the fx-991ES, but it may also be more expensive.
          • ramona
            over 1 year ago
            The main key features of Casio 991EX over 991ES plus are : It is the fastest calculator ever by Casio. It is almost 4 times faster than 991ES Plus. It has almost 4 times screen resolution as compared to 991ES Plus.
          • arlean_braun
            over 1 year ago
            If you are trying to decide between the Casio 991EX and the 991ES Plus, I would recommend going with the 991EX. It is the fastest calculator ever made by Casio, and it is almost four times faster than the 991ES Plus. In terms of screen resolution, the 991EX also has almost four times the resolution of the 991ES Plus. Overall, the 991EX is the superior calculator in terms of speed and screen resolution.
          • What's the difference between products? Share your opinion.

          Often compared with Casio FX-991ES

          Often compared with Casio FX-991EX