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10 Best Casio Calculator Scientific Fx 991ex in The UK

Last updated on 09/07/2025
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9.9
Exceptional
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Casio fx-CG50 Graphic Calculator (UK version)
Casio
Casio fx-CG50 Graphic Calculator (UK version)
9% Off
Why We Love It
  • Exam board approved calculator.
  • Large high-resolution colour screen.
  • Includes protective hard cover.
Main Highlights
  • This version of the FX-CG50 graphic calculator comes with an English only user manual, and accordingly suits British users only.
  • The fx-CG50 is CASIO's most advanced graphic calculator approved by exam boards of the United Kingdom. Its functionality is a perfect fit for British exam levels from GCSE to A-level Maths, Further Maths and International Baccalaureate (IB)
  • The user-friendly icon menu, function keys and interactive format enable intuitive operation. The large high-resolution colour screen gives exceptional clarity and easily distinguishes different graphs
  • Over 3,000 functions to include; Equation Solvers, Spreadsheets, Graph Solvers, Data Charts, Matrix and Vector Calculations, e-activity, Geometry application, Picture plot and 3D display
  • Includes PC connection cable and slide on hard cover for protection of the screen and keyboard
9.9
Exceptional
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Best Value
2
9.8
Exceptional
Save 36%
CASIO FX-991EX Advanced Engineering/Scientific Calculator (UK VERSION), Black
Casio
CASIO FX-991EX Advanced Engineering/Scientific Calculator (UK VERSION), Black
36% OffFree Shipping
Why We Love It
  • UK’s best-selling Scientific calculator.
  • Solar powered and reliable.
  • 552 Mathematical functions included.
Main Highlights
  • The UK’s best-selling advanced Scientific calculator.
  • Especially recommended for advanced GCSE, a/as level and higher.
  • This model has now been replaced with the new upgraded FX-991 packed with addtional features
  • 552 Mathematical functions
  • Solar powered with battery backup
9.8
Exceptional
Save 36%
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3
9.7
Exceptional
Casio FX-991DE X (German)
Casio
Casio FX-991DE X (German)
Free Shipping
Why We Love It
  • High-resolution LCD display.
  • QR code function.
  • Includes protective case.
Main Highlights
  • Casio FX-991DE X
9.7
Exceptional
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4
9.6
Superb
Save 42%
Casio fx-991CW Advanced Scientific Calculator (UK Version)
Casio
Casio fx-991CW Advanced Scientific Calculator (UK Version)
42% OffFree Shipping
Why We Love It
  • Approved for all UK exams.
  • Best-selling advanced calculator.
  • Dual powered and reliable.
Main Highlights
  • Casio fx-991 is the UK’s best-selling ‘advanced scientific’ calculator.
  • fx-991 CW is the new upgraded version of the fx-991 EX
  • Allowed in every UK exam where a calculator can be used
  • Approved for Key stages 3, 4 and 5, recommended for Advanced GCSE, A/AS level and Highers
  • Dual powered, solar with battery back up and auto power-off
9.6
Superb
Save 42%
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5
9.6
Superb
Save 24%
Casio fx-991ES Plus 2 Scientific Calculator with 417 Functions and Display, Natural
Casio
Casio fx-991ES Plus 2 Scientific Calculator with 417 Functions and Display, Natural
24% OffFree Shipping
Why We Love It
  • Age-approved for younger users.
  • Natural textbook-style display.
  • Solar and battery powered.
Main Highlights
  • Approved for age version
  • Natural display to insert and display numerical expressions as they appear on textbooks
  • 24 brackets
  • Regression and correlation coefficient
  • 2023232324 battery.Solar powered and battery.Dimensions: 1. 4 x 7 7 x 16.2 cm
9.6
Superb
Save 24%
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6
9.5
Superb
Save 8%
CLIUNT FX-991EX Scientific Calculator, Engineering Scientific Calculator With 552 Functions, Lcd Display Scientific Calculators for School Students
CLIUNT
CLIUNT FX-991EX Scientific Calculator, Engineering Scientific Calculator With 552 Functions, Lcd Display Scientific Calculators for School Students
8% OffFree Shipping
Why We Love It
  • 552 scientific functions available.
  • Dual power ensures operation.
  • Compact design for portability.
Main Highlights
  • 552 Functions: This advanced scientific calculator provides a total of 552 scientific functions, covering a wide range of mathematical operations, including basic calculations, algebra, fractions, derivatives, integrals, scientific functions and statistical calculations, etc., Engineering scientific calculator allowing you to handle complex calculations with ease calculation.
  • Dual Power Supply Electronic Calculator: Solar panel + replaceable button battery, dual safe uninterruptible power supply, environmental protection and energy saving advantages, smooth use, long battery life, you can use scientific calculator anytime and anywhere without worrying about battery problems.
  • High-Resolution Display: The high-resolution Lcd display scientific calculator can be used to view spreadsheets, calculations, and other data,scientific calculator ensuring that numbers, symbols, and graphs are displayed clearly and easy to read, engineering scientific calculator is especially useful when working with complex mathematical expressions and charts.
  • Natural Textbook Display: The calculator features a natural textbook display that covers most of the scientific functions students from middle school to college need for use in courses and exams. Entering expressions, symbols and arithmetic operations in the same form as written in the textbook ,scientific calculator will help students view the calculation process and results, engineering scientific calculator making it easier for students to understand and verify calculations.
  • Easy to Carry: The size of this scientific calculator is 16.5*8*1.5cm and the weight is 170g. The compact and lightweight design makes it easy to carry and use anywhere. Engineering scientific calculator is equipped with a sliding hard case for easy portability.
9.5
Superb
Save 8%
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7
9.3
Superb
OSALO Scientific Calculator 552 Functions 4 Line Written Display Solar and Battery for School College Math Engineering Calculators Black (OS-991EX CW)
OSALO
OSALO Scientific Calculator 552 Functions 4 Line Written Display Solar and Battery for School College Math Engineering Calculators Black (OS-991EX CW)
Free Shipping
Why We Love It
  • Intuitive menu for easy navigation.
  • High-resolution display enhances clarity.
  • Designed for students' academic needs.
Main Highlights
  • 【Intuitive Icon Menu & High-Resolution Display】Effortlessly navigate with a user-friendly icon-based menu and manage data via the built-in spreadsheet tool. The 4x higher-resolution display ensures crisp rendering of complex equations like integrals and matrices
  • ​【552 Advanced Functions】​Master 552 functions including dynamic variable tables for real-time adjustments, matrix/vector operations, and calculus tools. Simplify work with ​over 50 preloaded scientific constants and unit conversions. No QR Functionality
  • 【Written Display】Input expressions in Written Display format, with a multi-line screen showing input, steps, and results. This feature is convenient for students to check the calculation process and results. The LED backlight enhances visibility in dim environments ​for stress-free readability
  • 【Perfect for High School and College Students】This scientific calculator caters to students from secondary school to university. Designed for most academic levels, ​it helps users tackle engineering mechanics, chemical reaction calculations, and biological data analysis with precision
  • 【Answer Memory and Replay Function】With the answer memory feature, you can quickly retrieve and effortlessly reuse or edit previous formulas—whether working with complex equations or common calculations. Say goodbye to repeated input and enjoy a more streamlined, efficient experience
9.3
Superb
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8
9.1
Superb
Dakexiong FX-991EX Scientific Calculator Multi-Function Calculator Scientific, 522 Functions, 10+2 Screen Displays - Ideal for Students and Teachers, Office, Black
Dakexiong
Dakexiong FX-991EX Scientific Calculator Multi-Function Calculator Scientific, 522 Functions, 10+2 Screen Displays - Ideal for Students and Teachers, Office, Black
Free Shipping
Why We Love It
  • Clear, sharp display eases readability.
  • Extensive functions for all calculations.
  • Durable cover prevents damage effectively.
Main Highlights
  • High-definition display: 10+2 on-screen display provides a clear, sharp view of your calculations. Whether you're working with complex equations or simple arithmetic, the large screen ensures easy readability and reduces eyestrain during prolonged use.
  • Powerful: Equipped with 522 functions, FX-991EX Scientific Calculator can handle a wide range of mathematical operations, from basic arithmetic to matrix calculations, statistical functions and vector operations. Its responsive system produces quick results, making it an excellent tool for solving complex problems in a timely manner.
  • Durable Protection: Scientific Calculator comes with a sliding hard shell cover. The cover not only protects the keys from scratches and damage, but also protects the body of the calculator. Calculator Scientific provides a degree of protection against accidental drops and knocks, ensuring that the calculator stays in perfect condition for a long time.
  • Reliable buttons: Plastic buttons are designed to provide a responsive touch. Each button is easy to press and has a unique feel, which is essential for accurate input. Additionally, these buttons are highly resistant to wear and tear and retain their functionality even after prolonged use.
  • Convenient Power: No solar function, powered by button batteries for stable and long-lasting power. Batteries can be replaced at any time, eliminating the need for frequent charging or reliance on unstable power sources.
9.1
Superb
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9
9.0
Superb
Save 15%
FX-991CW Advanced Scientific Calculator
Casio
FX-991CW Advanced Scientific Calculator
15% OffFree Shipping
Why We Love It
  • High resolution for detailed viewing.
  • Natural textbook display format.
  • Numerous scientific functions included.
Main Highlights
  • High Resolution Display to view more data like spreadsheets and 4x4 matrix calculations
  • Natural Text book display - symbols and numbers appear just as they do in textbook
  • Numeric Integration/Differentiation. 552 functions
  • Simultaneous and Polynomial Solver
  • 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.
9.0
Superb
Save 15%
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10
9.0
Superb
Save 12%
Casio FX-991 CW (Italian Model) Scientific Calculator, 540 Functions and Natural Display
Casio
Casio FX-991 CW (Italian Model) Scientific Calculator, 540 Functions and Natural Display
12% OffFree Shipping
Why We Love It
  • 540 versatile school functions.
  • High-resolution natural LCD display.
  • Spreadsheet for studying statistics.
Main Highlights
  • Scientific calculator (Italian Model) with over 540 functions designed for school
  • High resolution natural LCD display with 192 x 63 pixels and icon menu
  • Spreadsheet to study statistics
  • QR code for continuing calculations on PC
  • Solving equations and systems up to 4 equations and matrix calculation 4 x 4
9.0
Superb
Save 12%
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