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Impartial price comparison

Hitech C1507 vs. Casio FX-991EX + 9

Hitech C1507

Hitech C1507

£12.65

£17.14 Incl. delivery
Casio FX-991EX

Casio FX-991EX

£21.99

Free delivery
Casio FX-CG50

Casio FX-CG50

£99.99

£102.99 Incl. delivery
Casio FX-991ES Plus

Casio FX-991ES Plus

£7.80

£13.78 Incl. delivery
Casio FX-85GT Plus

Casio FX-85GT Plus

£12.07

£15.44 Incl. delivery
Casio FX-85ES Plus

Casio FX-85ES Plus

£15.98

£20.71 Incl. delivery
Texas Instruments TI-84 Plus

Texas Instruments TI-84 Plus

£4.99

£119.99 Incl. delivery
Casio FX-85GT

Casio FX-85GT

£10.99

Free delivery
Casio FX-83GT

Casio FX-83GT

£8.99

£9.99 Incl. delivery
Casio FX-83ES Plus

Casio FX-83ES Plus

£16.79

£19.76 Incl. delivery
Sharp EL-334F

Sharp EL-334F

£9.99

£14.48 Incl. delivery
Colour/ material
Grey
White, Black, Silver, Grey
White, Black, Grey, Blue
White, Black, Silver, Grey
White, Black, Silver, Pink, Grey, Blue
Black, Silver, Pink, Grey
White, Black, Silver, Grey, Blue, Yellow
White, Black, Silver, Blue
White, Black, Silver, Pink, Grey, Blue
Black, Silver
White, Silver, Grey
Dimensions (WxHxD)
Depth
11.1 mm
89.5 mm
11.1 mm
11 mm
11 mm
192 mm
155 mm
161 mm
32 mm
150 mm
Height
165.5 mm
5 mm
162 mm
162 mm
162 mm
27 mm
12 mm
13.7 mm
245 mm
15 mm
Width
77 mm
89 mm
80 mm
80 mm
80 mm
89 mm
84 mm
80 mm
155 mm
105 mm
Product weight
90 g
230 g
95 g
90 g
210 g
268 g
110 g
110 g
220 g
210 g
Eco labels
Features
Economic functions, Equation solver, Complex functions, Matrices, Statistical functions
Programmable, Colour screen, CAS (Computer Algebra System), Economic functions, Statistical functions
Programmable, CAS (Computer Algebra System), Economic functions, Equation solver, Complex functions, Matrices
Equation solver, Complex functions, Statistical functions
Watch, Programmable, Calendar, Colour screen, CAS (Computer Algebra System), Economic functions, Equation solver, Complex functions, Matrices, Statistical functions
CAS (Computer Algebra System), Statistical functions
Programmable, Statistical functions
Economic functions
Display characters/line
8 ​
16 ​
8 ​
16 ​
12 ​
12 ​
16 ​
10 ​
10 ​
10 ​
Display Lines
4 ​
8 ​
4 ​
1 ​
8 ​
2 ​
1 ​
1 ​
Type
Calculator
Graphing calculator
Calculator
Calculator
Graphing calculator
Graphing calculator
Graphing calculator
Graphing calculator
Graphing calculator
Calculator
Graphing feature
3D graphics
Parametric graphs, Polar graphs, Recursively defined sequences, Differential Equations, Split screen, Rectangular graphs
RAM (total)
61 kB
24 kB
RAM (usable)
24 kB
ROM memory (usable)
0.48 MB
Battery operated
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Battery type
LR44
R3 (AAA)
LR44
LR44
R3 (AAA)
R3 (AAA)
R3 (AAA)
R3 (AAA)
External power connection
Solar cell
Solar cell
USB, Solar cell
USB, Solar cell
Solar cell
Solar cell
External source (12-230V), USB
Solar cell
External source (12-230V), Solar cell
External source (12-230V), Solar cell