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Compare 4 products

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Casio FX-991ES Calculator
Casio FX-991ES
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Casio FX-991EX Calculator
Casio FX-991EX
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Sharp EL-2128V Calculator
Sharp EL-2128V
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Texas Instruments TI-36X Pro Calculator
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 %
3
4.0 out of 5
3 user ratings
5 stars
33 %
4 stars
33 %
3 stars
33 %
2 stars
0 %
1 stars
0 %
55
3.9 out of 5
55 user ratings
5 stars
40 %
4 stars
25 %
3 stars
23 %
2 stars
10 %
1 stars
0 %

Technical details

TypeScientific calculatorScientific calculatorFinancial calculatorScientific calculator

Design

Colour of product
  • Silver
  • White
  • Black
  • Black,White
SilverBlack
Control typeButtonsButtons
N/A
N/A
Form factorPocketPocketDesktop
N/A
Digit comma separator
N/A
yes
N/A
N/A
Cover
N/A
no
N/A
no

Display

Number of characters per line12161216
Number of display lines22
N/A
4
Display typeDot-matrixLCD
N/A
N/A
Display tiltingnono
N/A
no
Second displaynono
N/A
no
Display lightnono
N/A
no

Power

Power source
  • Solar
  • Battery
  • Solar
  • Battery
BatterySolar
Battery operatedyesyes
N/A
yes
Battery typeAAALR44LR44
N/A
External power connectionSolar cell
  • Solar cell
  • External source
N/A
Solar cell
Number of batteries required
N/A
1
N/A
N/A

Often compared with Casio FX-991ES

Often compared with Casio FX-991EX

Often compared with Texas Instruments TI-36X Pro