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Casio FX-991DE X vs Casio FX-991ES Plus

3.03 in
0.44 in
Casio FX-991DE X Calculator
Casio FX-991DE X
3.15 in
0.44 in
Casio FX-991ES Plus Calculator
Casio FX-991ES Plus
Available colors
User rating
65
3.6 out of 5
65 user ratings
5 stars
24 %
4 stars
30 %
3 stars
30 %
2 stars
9 %
1 stars
4 %
294
3.4 out of 5
294 user ratings
5 stars
22 %
4 stars
19 %
3 stars
36 %
2 stars
15 %
1 stars
5 %

Full Comparison

Technical details

Casio FX-991DE XCasio FX-991DE X
Casio FX-991ES PlusCasio FX-991ES Plus
TypeScientific calculatorScientific calculator

Design

Casio FX-991DE XCasio FX-991DE X
Casio FX-991ES PlusCasio FX-991ES Plus
Colour of productBlack
  • Grey
  • Violet,White
Control typeButtonsButtons
Form factorPocketPocket
Coveryesno

Dimensions

Casio FX-991DE XCasio FX-991DE X
Casio FX-991ES PlusCasio FX-991ES Plus
Width3.03 in3.15 in
Height0.44 in0.44 in
Depth6.52 in6.38 in
Weight3.17 oz3.35 oz

Display

Casio FX-991DE XCasio FX-991DE X
Casio FX-991ES PlusCasio FX-991ES Plus
Number of display lines24
Display typeLCDDot-matrix
Display tiltingnoyes
Second displaynono
Display lightnono

Connectivity

Casio FX-991DE XCasio FX-991DE X
Casio FX-991ES PlusCasio FX-991ES Plus
Data transfernono

Power

Casio FX-991DE XCasio FX-991DE X
Casio FX-991ES PlusCasio FX-991ES Plus
Power source
  • Solar
  • Battery
  • Solar
  • Battery
Battery operatedyesyes
Battery typeLR44LR44
Number of batteries required11
External power connection
  • External source
  • Solar cell
  • Solar cell
  • USB
  • External source

Pros & Cons

Pros
      Cons

          Often compared with Casio FX-991DE X

          Often compared with Casio FX-991ES Plus