Advertising Disclosure Casio Fx991ex Classwiz Comparison - August 2025
6 Best Casio Fx991ex Classwiz In the UK
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service levels, popularity trends, and more. The rankings reflect our opinion and should be a good starting point for shopping. By purchasing the products we rank, you’ll get the lowest price we found while we may receive a commission at no cost to you, which will help us continue to provide you with value.
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| 1 Best Choice  9.8Exceptional | 2  9.7Exceptional | 3 Best Value  9.4Excellent | 4  9.2Excellent | 5  9.1Excellent | 6  9.0Excellent |
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ModelCASIO FX-991EX Advanced Engineering/Scientific Calculator (UK VERSION), Black | Model FX-991CW Advanced Scientific Calculator | Model Casio fx-991CW Advanced Scientific Calculator (UK Version) | 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 |
BrandCasio | Brand Casio | Brand Casio | Brand Casio | Brand Casio | Brand CLIUNT |
Reviews | Reviews | Reviews  | Reviews | Reviews | Reviews |
Tech Specs | |||||
product dimensions 16.8 x 8.2 x 1.8 cm 90.01 g | product dimensions 7.7 x 16.21 x 1.07 cm 94.97 g | product dimensions 16.2 x 7.7 x 1.1 cm 150 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. included | batteries 1 LR44 batteries required. | batteries - | batteries 1 LR44 batteries required. included | batteries 1 CR2 batteries required. |
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
1Casio72% OffCASIO 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
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9.7
2Casio
FX-991CW Advanced Scientific Calculator
Why we love it
Displays data clearly and accurately.
Excellent for complex mathematical calculations.
User-friendly textbook-style display.
Main highlights- Simultaneous and Polynomial Solver
- Numeric Integration/Differentiation. 552 functions
- Natural Text book display - symbols and numbers appear just as they do in textbook
- International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.
- High Resolution Display to view more data like spreadsheets and 4x4 matrix calculations
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9.4
3Casio41% 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
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Features
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Consumer Reviews
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Popularity
Popularity is an important criterion in choosing a product. Several factors contribute to the popularity of the products on our site, including prestige, relevance, reputation, news, and more.
Value for money
TopChoice.co.uk compares product attributes to price, examines tech specs, ratings and reviews, and more.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.
Value for money
TopChoice.co.uk compares product attributes to price, examines tech specs, ratings and reviews, and more.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.
