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Impartial price comparison

Sharp EL-W531 vs. Casio FX-991EX + 7

Sharp EL-W531

Sharp EL-W531

£9.93

£14.42 Incl. delivery
Casio FX-991EX

Casio FX-991EX

3.8

£21.99

Free delivery
Casio FX-CG50

Casio FX-CG50

£95.99

Free delivery
Casio FX-9750G II

Casio FX-9750G II

4.3

£59.99

Free delivery
Casio FX-9860G II

Casio FX-9860G II

£81.56

£110.93 Incl. delivery
Casio FX-83GT

Casio FX-83GT

£8.99

£9.99 Incl. delivery
Casio FX-83GT Plus

Casio FX-83GT Plus

£10.34

£15.33 Incl. 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

£16.59 Incl. delivery
Colour/ material
White, Black, Silver, Blue
White, Black, Silver, Grey
White, Black, Grey, Blue
White, Black, Grey, Blue, Yellow
Black, Silver, Grey, Blue
White, Black, Silver, Pink, Grey, Blue
Black, Silver, Grey
White, Black, Silver, Grey
Black, Blue, Yellow
Dimensions (WxHxD)
Depth
161.5 mm
11.1 mm
89.5 mm
180.5 mm
21 mm
161 mm
13.8 mm
11.1 mm
Height
15.5 mm
165.5 mm
5 mm
21.3 mm
184 mm
13.7 mm
162 mm
162 mm
8.6 mm
Width
79.6 mm
77 mm
89 mm
87.5 mm
92 mm
80 mm
80 mm
80 mm
75 mm
Product weight
100 g
90 g
230 g
205 g
230 g
110 g
100 g
95 g
660 g
Eco labels
BlueAngel
Features
Equation solver, Complex functions, Matrices, Statistical functions
Economic functions, Equation solver, Complex functions, Matrices, Statistical functions
Programmable, Colour screen, CAS (Computer Algebra System), Economic functions, Statistical functions
Programmable, Economic functions, Equation solver, Complex functions, Matrices, Statistical functions
Display light, Watch, Programmable, Calendar, Equation solver, Complex functions
Programmable, Statistical functions
Equation solver, Complex functions, Statistical functions
Programmable, CAS (Computer Algebra System), Economic functions, Equation solver, Complex functions, Matrices
Display characters/line
16 ​
16 ​
8 ​
21 ​
21 ​
10 ​
12 ​
16 ​
8 ​
Display Lines
4 ​
4 ​
8 ​
8 ​
8 ​
2 ​
2 ​
4 ​
1 ​
Type
Calculator
Calculator
Graphing calculator
Graphing calculator
Graphing calculator
Graphing calculator
Calculator
Calculator
Calculator
Graphing feature
3D graphics
Parametric graphs, Polar graphs, Differential Equations, Split screen, Rectangular graphs
Parametric graphs, Polar graphs, Recursively defined sequences, Split screen
RAM (total)
61 kB
64 kB
64 kB
RAM (usable)
62 kB
ROM memory (usable)
Battery operated
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Battery type
LR44
LR44
R3 (AAA)
R3 (AAA)
R3 (AAA)
R3 (AAA)
R3 (AAA)
LR44
External power connection
Solar cell
Solar cell
USB, Solar cell
USB
External source (12-230V), USB
Solar cell
Solar cell
USB, Solar cell
Solar cell