Casio FX-991CW Original Advance Scientific Calculator


ClassWiz CW Series is designed to teach and study for today. Its brand-new approachable UI and various features encourage students’ math learning.

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The new CASIO FX-991CW ClassWiz CW Series is designed for the teaching and studying of today. With its new design and key placement, it can be used by anyone. Includes matchbox, a fun math learning feature. Links up with to support ICT classes. These features help to boost students’ curiosity toward math learning.


  • Approchable Design
    The new display and key layout of the ClassWiz CW Series offer intuitive operability, making it easier for students to learn and teachers to teach.
  • High-definition & 4-gradation display
    The new four-tone screen brings gray into the equation, so you can easily tell which part is being entered.
  • Simple Cursor Operation and Layout
    New ‘OK’ and ‘Back’ keys are added to a streamlined layout that places frequently used keys close to each other, for easy operation with minimal confusion.
  • Easy-Push Keys
    The convex and rounded key faces make it easy to push evenly from any angle.
  • Easy-to-Understand Key Labeling 
    The printed labeling around the keys has been simplified, making it easier to locate your most-used keys.
  • Easy and Intuitive operability
    The intuitive and interactive operation makes it easy to use the features of ClassWiz.
    With the use of icons, the selection of the desired function is quick and easy.
    Visual, interactive, and textbook-based displays make operation easier for teaching the use of scientific calculators, so you can concentrate on teaching mathematics.
  • Natural Textbook Display Models
    Input and display fractions, powers, Logarithms, roots, and other mathematical formulas and symbols just as they appear in textbooks.
  • Interactive, easy-to-learn icon display
    The use of icons on the menu screen improves viewability. Selection of the desired function is quick and easy. The ClassWiz CW Series shows icons and app names together, making it even easier to select them from the menu.
  • Detailed Lists on a High-Resolution LCD Display
    Variables and statistical calculation results stored in memory can be displayed in lists.
  • High-speed calculation
    Like the ClassWiz EX Series, it offers fast calculation for smooth performance in class or during examinations.
  • *Functions for which specific models are not indicated are available in all models.


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