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Casio ClassWiz CW fx-991CW Scientific Calculator

by Casio
Original price $25.95
Original price $25.95 - Original price $25.95
Original price $25.95
Current price $22.95
$22.95 - $22.95
Current price $22.95

Quantity discounts available! Email

The fx-991CW ClassWiz is the latest enhancement to the scientific calculator. With an all-new quadruple graded LCD display, users will be able to easily find their cursor while writing and modifying expressions. The ClassWiz features circular, convex buttons that are appropriately spaced to prevent the mis-keying of information, and the button labels now feature glyphic representations of the functions they perform. The hard plastic case features an etched edge surface to prevent slipping in the hand. The ClassWiz can store and recall up to nine variables which can contain integers, computations, and functions. The variables will persist in the calculator's memory between sessions. All of the calculator's functions can be accessed through the convenient Math Catalog. The Math Catalog also hosts 47 scientific constants and 40 measurement conversions. By partnering the ClassWiz with an internet-capable mobile device, solutions can be graphed and visualized through by scanning a QR code on the calculator's screen.

Basic Information

Product features

  • Non Programmable
  • Non Graphing

Product type

  • Non Programmable
  • Non Graphing

Number of digits

  • 10 + 2 digits

Liquid crystal display

  • Natural textbook display
  • Icon menu
  • Dot matrix display
  • High Resolution
  • 4-gradation display

Key characteristics

  • Plastic keys

Key functions

  • Negative Sign
  • Power Off


  • Variables: 9 (A,B,C.D.E.F.X.Y,M)
  • Variables List
  • Answer Memory
  • Function memory
  • Memory Protection
  • Reset Function

Power supply

  • Solar & Battery
  • Approximate battery life Main 2 years
  • Auto Power Off

Size (D × W × H)

  • 162 × 77 × 10.7 mm


  • 95 g


  • Hard Case

Display Settings

Display format settings

  • Number Format: Fix
  • Number Format: Sci
  • Number Format: Norm
  • Engineering Symbol
  • Engineering Notation
  • Fraction / Decimal Conversion
  • Angle Unit (Degree, Radian, Gradian)
  • Improper/Mixed Fraction
  • Sexagesimal/Decimal Conversion
  • Digit Separator

Calculation Functions

Basic calculation

  • Basic Calculation
  • Bracket Calculation
  • Fraction Calculation
  • Degree, Minute, Second (Sexagesimal) Calculations
  • Reciprocal Calculation
  • Percent Calculation (scientific calculator function)
  • Ratio calculation
  • Factorial Function
  • π
  • Irrational number calculation
  • Rounding Function

Advanced calculation

  • Transcendental number: e
  • Base-n calculation
  • Logical Operators
  • Complex number calculation
  • Matrix calculations
  • Vector calculations
  • Ratio calculation
  • Spreadsheet
  • Numeric Table
  • Simultaneous Equation
  • Polynomial Equation
  • Inequality Calculations
  • List based STAT-data editor
  • 1-Variable statistics
  • 2-Variable statistics and regression
  • Distribution Calculations
  • Mathbox (Coin Toss, Dice Roll)

Applied calculation

  • Continuous Calculation
  • Replay Function
  • Multi-replay Function
  • UNDO
  • SOLVE Function

Functions Features

Basic functions

  • Basic Mathematical Functions
  • Independent Key x
  • Absolute Value Calculation
  • Square and square root (x2/√)
  • Power and radical root (xy/x√)
  • Trigonometric, inverse trigonometric (sin/cos/tan/sin–1/cos–1/tan–1)
  • Hyperbolic, inverse hyperbolic (sinh/cosh/tanh/sinh–1/cosh–1/tanh–1)
  • Exponential, logarithmic (log, ln, 10x, ex)
  • Base specified logarithmic
  • Coordinate Conversion
  • Combination / Permutation
  • Prime Factorization
  • Random Number Generation
  • Random Integer Generation
  • Summation
  • Differentiation Calculation
  • Integration calculation

Physics- and chemistry-related functions

  • Scientific Constants
  • Metric conversion function

Statistical Functions

Statistical data

  • List based STAT-data editor

Exam Compatibility

Permitted in exams

  • GCSE/AS/A Level

Peripheral Devices

Connection to peripheral devices

  • QR Code
  • Authenticity Check
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