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Casio FX 991 CE X

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€22.36 without VAT

Casio FX 991 CE X

Do you want to equip your schoolchild with a calculator that will last through secondary school and university? Put your trust in the Casio calculator. The advantage of this Casio device is its ability to charge through a built-in solar panel. As a back-up power, you can use the LR44 battery. This calculator will last a lifetime. It has many scientific features and the function of generating the QR code on the display. The Casio FX 991 CE X calculator also has a spreadsheet function that allows basic spreadsheet calculations.

Key Features of the Casio FX 991 CE X Calculator

  • The Casio FX 991 CE X has a spreadsheet
  • LCD High resolution (192 × 63 pixels) display
  • Memory capacity up to 160 statistical data items
  • Intuitive display, easy-to-remember icons
  • Interactive and easy viewing
  • Natural textbook-like display - V.P.A.M
  • The results stored in the memory can be as a list
  • Online visualisation using QR code

The Casio FX 991 CE X Model

In the Casio ClassWiz line, the calculators have a new 192 × 63 pixel high-resolution LCD display. This resolution is four times higher than it the well-known FX-ES plus series. The new calcultor also comes with a new hardware with a faster processor and double the amount of memory. This Casio product has a solid cover and features a new QR-Code function and the already-mentioned spreadsheet.

The Casio FX 991 CE X has 668 functions

  • Dual power supply (solar + LR44)
  • 2 years battery life
  • Dimensions: 11.1 × 77 × 165.5mm
  • Weight: 90g
  • Sliding cover 
  • The internal operating number of digits is 15
  • 24 parentheses
  • Icon menu
  • Spreadsheet
  • Solving equations and up to 4-equation systems
  • Vector calculations
  • Integral calculations
  • Differential calculations
  • Probability distribution
  • Calculations with technical symbols
  • Return to the previous calculation step
  • Calculations with complex numbers
  • N Base Calculation
  • Calculations of equations and inequalities
  • SUM calculations
  • Periodic table
  • 47 scientific constants
  • 9 memory variables
  • Goniometric and inverse goniometric functions
  • Hyperbolic and inverse hyperbolic functions
  • Calculations of powers and roots
  • Logarithmic calculations
  • Exponential calculations
  • Roots
  • Combinatorics and permutations
  • Decomposition to prime numbers
  • Random number
  • Converting polar coordinates to rectangular coordinates and backward
  • Fragments (two modes)
  • Convert from the sixty-five to the full and back
  • Calculations in degrees, grades and radians
  • SCI / FIX / ENG
  • Statistical calculations
  • Statistics of one variable
  • Standard deviation
  • Statistics of two variables (regression)
  • Percent calculations
  • Automatic parentheses adding
  • Function table
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Calculator type Scientific

Power supply

Type of power source Both solar and battery powered
Batteries CR44 / LR44 (Button cell)


Equipment Protective case, Automatic turn-off, QR-code generation
Keyboard type Platic
Mathematic function number 668 functions


Basic funtions Root, Percent
Science functions Trigonometric functions Sin, Cos, Tan, Cotg, Fractions, Logarithmic functions, Complex numbers, Derivatives and integrals, Calculations in DEC, BIN, OCT, HEX, PEN, Calculations with matrices and vectors, Solving linear equation systems, Numeric formulas, Graphic illustration, Statistics of two variables, Physical Constants, Table of function values, Natural-looking calculation display, Unit conversions
Money functions Total sum


Display Dot
Screen width - screen spot number 16

Dimensions and weight

Height 16.55 cm
Width 7.7 cm
Depth 1.11 cm
Weight 90 g
Code:  QS770y7
Warranty: 24 months
Product Number:  FX 991 CE X
Links: Manufacturer's Website: