Top 10 Casio FX-991EX

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Last update: 12-07-2026

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1
CASIO FX-991EX Advanced Engineering/Scientific Calculator (UK VERSION), Black
Casio

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

  • 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
9.5/10
Editor's Pick
Available at Amazon
2
Casio FX-CG50 Graphic Calculator (UK version)
Casio

Casio FX-CG50 Graphic Calculator (UK version)

  • 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
9.4/10
Bestseller
Available at Amazon
3
Casio FX-991CW Advanced Scientific Calculator (UK Version)
Casio

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

  • 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
9.3/10
Available at Amazon
4
Casio FX-991ES Plus-2nd Edition Scientific Calculator
Casio

Casio FX-991ES Plus-2nd Edition Scientific Calculator

  • Redesigned ES PLUS series calculators featuring easy-to-understand Natural Textbook Display, Non-Programmable Scientific Calculator with 417 Functions
  • Stylish design but same function as Casio FX-991ESPLUS 1st edition, 10-digit mantissa + 2-digit exponential display
  • Basic Trigonometrical & Statistics Functions, and many more functions
  • Colour coded keypad for easy key differentiation, Simple and easy to use, Comes with new slide on hard case
9.2/10
Available at Amazon
5
Casio FX-991DE X (German)
Casio

Casio FX-991DE X (German)

  • Casio FX-991DE X
9.1/10
Available at Amazon
6
Casio fx-991ES Plus C 2nd Edition Calculator
Casio

Casio fx-991ES Plus C 2nd Edition Calculator

  • Natural textbook display
  • Numerical Differentiation/ Integration
  • Matrix 4x4 /Vector calculations
  • Two variable Statistical regression
  • Complex numbers
8.9/10
Available at Amazon
7
Casio FX-991 CW (Model 2024) Scientific Calculator, 540 Functions and Natural Display
Casio

Casio FX-991 CW (Model 2024) Scientific Calculator, 540 Functions and Natural Display

  • Scientific calculator 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
8.8/10
Available at Amazon
8
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

  • 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
8.7/10
Available at Amazon
9
CATIGA SS-991EX Scientific Calculator with Advanced 550 Functions- Solar & Battery Powered, Multi-Function, High School & College Math, Trigonometry, Statistics, Algebra, Durable, Large Display
CATIGA

CATIGA SS-991EX Scientific Calculator with Advanced 550 Functions- Solar & Battery Powered, Multi-Function, High School & College Math, Trigonometry, Statistics, Algebra, Durable, Large Display

  • 552 FUNCTIONS SCIENTIFIC CALCULATOR: Includes spreadsheet, matrix calculations, statistics, calculus, complex number calculations, equation calculations, standard deviation, vector calculations, permutations and combinations. Perfect for Advanced and Beginner courses including Biology, Chemistry, Physics, Finance and Business.
  • USER FRIENDLY FORMAT: Displays formulas and expressions as they appear in textbooks, simplifying learning and problem-solving. This feature ensures that complex equations are presented in a clear, structured manner, making it easier for users to follow along and verify their work, ultimately enhancing accuracy and understanding in both educational and professional settings
  • LARGE HIGH RESOLUTION SCREEN: The high-resolution LCD display is 32% larger than regular two-line calculators, showing intricate details ideal for advanced operations such as spreadsheets and 4x4 matrix calculations. The spacious screen allows graphs and equations to be displayed simultaneously, enhancing the clarity and precision of your work
  • DUAL POWER SOURCE: Features both solar power and a battery backup, guaranteeing continuous performance for crucial calculations, making it reliable and efficient for use in any environment
  • DURABILITY and QUALITY: Engineered with strong materials, SS-991EX withstands extensive use, providing long-term reliability. If your calculator fails to turn on, try pressing the reset button on the back. For further issues, benefit from our 365-day limited warranty. Contact us, and we'll respond within 24 hours
8.6/10
Available at Amazon
10
DAJILI FX-991EX Scientific Calculator, Engineering Scientific Calculator with Solar Battery Scientific Portable Calculators Electronic Scientific Calculator 552 Functions for Students Teacher
DAJILI

DAJILI FX-991EX Scientific Calculator, Engineering Scientific Calculator with Solar Battery Scientific Portable Calculators Electronic Scientific Calculator 552 Functions for Students Teacher

  • 【552 Function scientific calculator】The FX-991EX scientific calculator provides 552 functions, including fractions, exponents, statistics, integrals, algebra, complex number calculations, standard deviation, linear regression, etc,. FX-991EX scientific calculator engineering scientific calculator also can help you solve complex mathematical problems easily, from mathematics to statistics, from algebra to geometry.
  • 【Natural Textbook Display】The science maths stationary calculater uses a high-resolution LCD display and a natural textbook display, allowing mathematical expressions to be easily interpreted, FX-991EX scientific calculator making complex calculations and equations easier to master. Never worry about deciphering confusing symbols again.
  • 【Compact keyboard with slide card case】This scientific portable calculators features a stylish and compact design, FX-991EX scientific calculator making it easy to carry. Functional engineering scientific calculator comes with a sliding cover, ergonomically designed and comfortable to hold, providing a layer of protection against dust and damage to the computer, and also protecting the lifespan of the scientific calculator.
  • 【Dual power supply electronic calculator】This electronic scientific calculator has a dual power supply system that can be powered by solar energy and batteries, FX-991EX scientific calculator which is energy-saving and environmentally friendly. You don't have to worry about running out of power during critical calculations. (Includes LR44 battery and solar panel)
  • 【Multi-purpose】Whether you're a student trying to solve algebraic equations, a teacher grading papers, or an engineer working on complex projects, our solar and battery calculators can meet all your math needs. The FX-991EX scientific calculator is approved for use in UK exams, making it a reliable companion for students during assessments.
8.5/10
Available at Amazon

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