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Impartial price comparison

Casio FX-991EX vs. Casio FX-CG50 + 4

Casio FX-991EX

Casio FX-991EX

£21.90

£21.99 Incl. delivery
Casio FX-CG50

Casio FX-CG50

£111.67

£118.65 Incl. delivery
Casio FX-9860G II

Casio FX-9860G II

£110.93

Free delivery
Casio FX-991ES Plus

Casio FX-991ES Plus

£7.80

£13.78 Incl. delivery
Texas Instruments TI Little Professor Solar

Texas Instruments TI Little Professor Solar

£13.25

£18.00 Incl. delivery
Colour/ material
White, Black, Silver, Grey
White, Black, Grey, Blue
Black, Silver, Grey, Blue
White, Black, Silver, Grey
Black, Blue, Yellow
White, Black
Dimensions (WxHxD)
Depth
11.1 mm
89.5 mm
21 mm
11.1 mm
15 mm
Height
165.5 mm
5 mm
184 mm
162 mm
8.6 mm
23 mm
Width
77 mm
89 mm
92 mm
80 mm
75 mm
86 mm
Product weight
90 g
230 g
230 g
95 g
660 g
210 g
Eco labels
BlueAngel
Features
Economic functions, Equation solver, Complex functions, Matrices, Statistical functions
Programmable, Colour screen, CAS (Computer Algebra System), Economic functions, Statistical functions
Display light, Watch, Programmable, Calendar, Equation solver, Complex functions
Programmable, CAS (Computer Algebra System), Economic functions, Equation solver, Complex functions, Matrices
Programmable, Colour screen, CAS (Computer Algebra System), Equation solver, Complex functions, Matrices, Statistical functions
Display characters/line
16 ​
8 ​
21 ​
16 ​
8 ​
16 ​
Display Lines
4 ​
8 ​
8 ​
4 ​
1 ​
Type
Calculator
Graphing calculator
Graphing calculator
Calculator
Calculator
Graphing calculator
Graphing feature
3D graphics
Parametric graphs, Polar graphs, Recursively defined sequences, Split screen
Parametric graphs, Polar graphs, Recursively defined sequences, 3D graphics, Differential Equations, Rectangular graphs
RAM (total)
61 kB
64 kB
RAM (usable)
65536 kB
ROM memory (usable)
100 MB
Battery operated
Yes
Yes
Yes
Yes
Yes
Battery type
LR44
R3 (AAA)
R3 (AAA)
LR44
Li-Ion
External power connection
Solar cell
USB, Solar cell
External source (12-230V), USB
USB, Solar cell
Solar cell
External source (12-230V), USB