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Impartial price comparison

Sharp EL-W531 vs. Casio FX-991EX + 2

Sharp EL-W531

Sharp EL-W531

£6.20

£12.18 Incl. delivery
Casio FX-991EX

Casio FX-991EX

£21.99

£24.89 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, Blue
White, Black, Silver, Grey
Black, Blue, Yellow
White, Black
Dimensions (WxHxD)
Depth
161.5 mm
11.1 mm
15 mm
Height
15.5 mm
165.5 mm
8.6 mm
23 mm
Width
79.6 mm
77 mm
75 mm
86 mm
Product weight
100 g
90 g
660 g
210 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), Equation solver, Complex functions, Matrices, Statistical functions
Display characters/line
16 ​
16 ​
8 ​
16 ​
Display Lines
4 ​
4 ​
1 ​
Type
Calculator
Calculator
Calculator
Graphing calculator
Graphing feature
Parametric graphs, Polar graphs, Recursively defined sequences, 3D graphics, Differential Equations, Rectangular graphs
RAM (total)
RAM (usable)
65536 kB
ROM memory (usable)
100 MB
Battery operated
Yes
Yes
Yes
Battery type
LR44
LR44
Li-Ion
External power connection
Solar cell
Solar cell
Solar cell
External source (12-230V), USB