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fx-991CW advanced scientific calculator
New ClassWiz+ range launched January 2026.
Our advanced scientific calculator, the UK’s best selling, been upgraded to the latest ClassWiz technology.
It features a brand-new interface with scrolling menus, all mathematical functions available in a single key and a new crystal-clear display.
You’ll really appreciate:
• natural maths display
• advanced maths functions
• scrolling menu navigation
• simplified keys with main functions
• easy-to-use number formatting
• 4-tone input display with a new font
• keys that work pressed at any angle
• the clip-on cover
You get all the basic maths functions and more. For GCSE there’s the basics plus equation and inequality solvers. For A-level there’s probability distributions. For Further Maths there’s complex numbers, matrices and vectors.
Interested in going graphic? Check out the fx-CG100.
- Description
- Specification
Our advanced scientific calculator with solar power comes with additional functions for solving equations and inequalities; calculating probability distributions; complex, vector and matrix arithmetic; base arithmetic and conversion; and a spreadsheet.
The new interface features scrolling menus, all mathematical functions available in a single catalogue key and number formats available in a format key. The new display has a new font and 4-tone input for extra clarity.
Suitable for all levels up to A-level (including Further Maths) and for professional work.
CALCULATION: arithmetic, trigonometry, logarithms, exponential, hyperbolic, equivalent ratio, complex number, vectors, matrices, base-n
STATISTICS: mean, standard deviation, quartiles, regression
SOLVER: simultaneous linear, polynomial, non-linear, inequalities
FUNCTIONS: table of values (2 functions),
PROBABILITY: Normal, inverse Normal, Binomial, Poisson
SPREADSHEET
SIMULATION: dice roll, coin toss
POWER: Solar panel, battery backup
ClassWiz+ has just launched
ClassWiz+ offers all the features you’re familiar with… PLUS an improved user interface, enhanced curriculum aligned functionality, and built with sustainability in mind.
The fx-991CW+ UK is now even better! It includes all the functionality you will find in an entry level scientific calculator and has been further improved based on feedback directly from educators, specifically designed for UK curriculum. It even has UK printed on the calculator, so that you know which model is appropriate for your syllabus.
• Ultimate Advanced calculator with new functionality such as; HCF, LCM and recurring decimals
• S<>D is easily accessible in one-press via the updated FORMAT key toggle
• Shortcuts are readily available in all menus by using the represented number keys for efficient navigation
• Standard Form conversion in format menu
• Shift Catalog for easy access to functionality
• A calculator designed and optimised for UK curriculums
Skills Resources for the fx-991CW
The intended audience and use for these videos are those outlined in the JMC report on Maths technology:
- For Teachers and Students looking for support on their calculator
- For Teachers to be able to show these videos in class as part of lessons
earn how to navigate ClassWiz CW scientific calculators using the navigation key…
How to reset the calculator, with options for resetting variable memory or not….
Learn how to calculate with fractions and recurring decimals using the fx-83GT C…
How to store answers and values in memory, and use memory in calculations….
Learn how to customise number display preferences on ClassWiz CW scientific calc…
How to check your ClassWiz calculator is a genuine Casio, and how to get help an…
Learn how to perform harder fraction calculations using ClassWiz scientific calc…
How to create a table of values for plotting a graph. We plot y=2x+1 and also sh…
ClassWiz: Maths Functions – fx-991CW What’s changed? Advanced Functions…
Learn how to calculate key statistical measures from a list of values or a frequ…
How to calculate powers and roots of any number The video is relevant for the fx…
How to find the product of prime factors of a number, and the highest common fac…
How to calculate the value of the first derivative and definite integral of a fu…
How to calculate the gradient, y-intercept and correlation coefficient of a line…
In this video we will look at how to define, add and multiply matrices. The vide…
How to calculate the scalar (dot) product, vector (cross) product and scalar tri…
In this video we will look at how to define vectors, and calculate a scalar mult…
How to calculate the determinant and inverse of a matrix We also cover finding t…
In this video we will look at how to solve linear and non-linear equations using…
In this video we will look at how to evaluate exponents and logarithms to differ…
Resources to help you explore the ClassWiz range
We recently had the chance to work with Joely as she developed five teaching resources dedicated to the new ClassWiz scientific calculator range.
Teachers and students share their views on new ClassWiz calculators
It’s important to us to stay up to date with how developments in our devices are being received by the people who use them every day.
How scientific calculators can boost classroom engagement
Calculators will never be a substitute for good teaching or effective learning, but they do offer huge potential to strengthen understanding, unlock new approaches to problems and build confidence.
In this video we will look at how to use coin flips to simulate probability outc…
In this video we will look at how to find the solutions to polynomial equations …
In this video we will look at how to make calculations and format numbers on the…
In this video we will look at how to use dice rolls to simulate probability outc…
In this video we will look at how to display charts in Classpad.net using the St…
fx-991CW transition videos
A selection of transition videos designed to help make the switch from the fx-991EX model to the new fx-991CW.
New ClassWiz: key changes – fx-991CW What’s changed? Apps, Navigation and Set…
New ClassWiz: Maths Functions – fx-991CW What’s changed? Maths Functions…
Register for your Calculator policy
To help you communicate calculator use in your school, we have developed some calculator policy templates for you to share with students and parents.
Examinations
The fx-991CW is permitted in GCSE & National 5 and A-level & Highers exams.
FAQs
How can we help? Visit our FAQ page to find out more about our calculators.