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Casio Fx 991ex Comparison - August 2025

6 Best Casio Fx 991ex In the UK

1
Best Choice
9.8Exceptional
2
Best Value
9.5Excellent
3
9.4Excellent
4
9.2Excellent
5
9.1Excellent
6
9.0Excellent
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Model

CASIO FX-991EX Advanced Engineering/Scientific Calculator (UK VERSION), Black
Model
Casio fx-991CW Advanced Scientific Calculator (UK Version)
Model
(Spanish Version) Casio FX-991ES Plus-2nd Edition Scientific Calculator
Model
CASIO Calculator Scientific FX 991CEX CLASSWIZ Black 12-Digit Display, 4 Languages, Hungarian, Polish, Czech, Slovak.
Model
Casio FX-991 CW (Italian Model) Scientific Calculator, 540 Functions and Natural Display
Model
CLIUNT FX-991EX Scientific Calculator, Engineering Scientific Calculator With 552 Functions, Lcd Display Scientific Calculators for School Students

Brand

Casio
Brand
Casio
Brand
CASIO
Brand
Casio
Brand
Casio
Brand
CLIUNT

Reviews

19,684 reviews
Reviews
19,708 reviews
Reviews
17,090 reviews
Reviews
88 reviews
Reviews
684 reviews
Reviews
32 reviews

Tech Specs

product dimensions

16.8 x 8.2 x 1.8 cm 90.01 g
product dimensions
16.2 x 7.7 x 1.1 cm 150 g
product dimensions
16.2 x 7.7 x 1.1 cm 95 g
product dimensions
25.4 x 5.08 x 6.86 cm 240 g
product dimensions
16.2 x 7.7 x 1.07 cm 95 g
product dimensions
16.5 x 8 x 0.1 cm 160 g

batteries

1 CR123A batteries required. included
batteries
1 LR44 batteries required.
batteries
1 LR44 batteries required. included
batteries
-
batteries
1 LR44 batteries required. included
batteries
1 CR2 batteries required.

item weight

89.9 g
item weight
150 g
item weight
95 g
item weight
-
item weight
-
item weight
-

number of items

1
number of items
1
number of items
1
number of items
-
number of items
-
number of items
-

manufacturer part number

FX-991EX
manufacturer part number
FX-991CW-W-UT
manufacturer part number
C79
manufacturer part number
-
manufacturer part number
-
manufacturer part number
-

customer reviews

4.7 4.7 out of 5 stars 9, 842 ratings 4.7 out of 5 stars
customer reviews
4.7 4.7 out of 5 stars 9, 854 ratings 4.7 out of 5 stars
customer reviews
4.5 4.5 out of 5 stars 8, 545 ratings 4.5 out of 5 stars
customer reviews
-
customer reviews
-
customer reviews
-

color

Black
color
black
color
Black
color
-
color
-
color
-

Available On

Available On
Available On
Available On
Available On
Available On

Our Top 3 Picks

Here are the top 3 recommended products with more information to help you find the right product for you
  • 9.8
    1
    Casio
    72% Off

    CASIO FX-991EX Advanced Engineering/Scientific Calculator (UK VERSION), Black

    Why we love it

    Extensive mathematical functions.
    Ideal for advanced educational use.
    Clear and intuitive display.
    Main highlights
    • This model has now been replaced with the new upgraded FX-991 packed with addtional features
    • The UK’s best-selling advanced Scientific calculator.
    • Solar powered with battery backup
    • Especially recommended for advanced GCSE, a/as level and higher.
    • 552 Mathematical functions
  • 9.5
    2
    Casio
    39% Off

    Casio fx-991CW Advanced Scientific Calculator (UK Version)

    Why we love it

    Widely approved for UK exams.
    Dual power ensures reliability.
    Advanced functions for higher education.
    Main highlights
    • fx-991 CW is the new upgraded version of the fx-991 EX
    • Dual powered, solar with battery back up and auto power-off
    • Casio fx-991 is the UK’s best-selling ‘advanced scientific’ calculator.
    • Approved for Key stages 3, 4 and 5, recommended for Advanced GCSE, A/AS level and Highers
    • Allowed in every UK exam where a calculator can be used
  • 9.4
    3
    CASIO
    10% Off

    (Spanish Version) Casio FX-991ES Plus-2nd Edition Scientific Calculator

    Why we love it

    Natural Textbook Display for easy reading.
    Ideal for students and professionals alike.
    Color-coded keypad simplifies use.
    Main highlights
    • Stylish design but same function as Casio FX-991ESPLUS 1st edition, 10-digit mantissa + 2-digit exponential display
    • Redesigned ES PLUS series calculators featuring easy-to-understand Natural Textbook Display, Non-Programmable Scientific Calculator with 417 Functions
    • Language: Spanish
    • Colour coded keypad for easy key differentiation, Simple and easy to use, Comes with new slide on hard case
    • Basic Trigonometrical & Statistics Functions, and many more functions

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Consumer Reviews

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Value for money

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When compared to other criteria, does the pricing seem reasonable? In order to provide genuine value for money, our team must answer that question with advanced calculations.