Casio FX 991EX Scientific Calculator

Availability: In stock

Features overview

The ClassWiz series with high-resolution LCD and many other extras 

The Classwiz series offers a new high-resolution LC display with 192×63 pixels and a resolution that is four times higher than that of the familiar displays of the FX-ES Plus series. In addition, the new ClassWiz series boasts new hardware with a faster processor and double the memory size.

Functions & general information


There is also a spreadsheet which allows the user to perform basic spreadsheet calculations on a scientific calculator for the first time. In addition, results can be viewed on a smartphone or tablet thanks to the newly available QR code¹ function.

Detailled Specification:

  • High-resolution LC display with 192 x 63 pixels
  • Natural-V.P.A.M. – Natural display
  • 552 functions
  • Icon menu
  • Spreadsheet
  • QR code function¹
  • Solving equations and systems of up to four equations
  • 4X4 matrices
  • Vector calculations
  • Integration calculations
  • Differential calculations
  • Probability distribution
  • Calculation with technical symbols
  • Undo-Function
  • Complex number calculation
  • Base-N calculations
  • Equation calculations
  • Inequality calculation
  • SUM calculation
  • 47 wcientific constants
  • 40 metrixc conversions
  • Automatic parenthesis
  • 24 Parentheses level
  • Variable memory (9)
  • Trigonometric and invers trigonometric functions
  • Hyperbolic and invers hyperbolic functions
  • Power / Power Root calculations
  • logarithmic calculations
  • Exponential calculations
  • Root calculations
  • Combinatoric and Permutation
  • Prime factorization
  • Random Integer
  • Conversion of polar coordinates into rectangular coordinates and invers
  • Fraction (two modes)
  • Conversion of sexagesimal into decimal and invers
  • Calculates in Degree, Grad and Radian
  • SCI/FIX/ENG function
  • List based statistics
  • 1-variable statistics
  • Standard deviation
  • 2-variable statistics (Regressions)
  • Percentage calculation
  • Non-natural input
  • Output with √ form
  • Output with Π form
  • Function table

¹ QR Code is registered trademark of DENSO WAVE INCORPORATED in Japan and in other countries.

General specifications

  • 552 functions
  • Display: „Natural Textbook Display“ Natural V.P.A.M.
  • High-Resolution LC-Display, 63 x192 dots, 16/10 + 2 digits
  • Energy supply: Solar + Battery (1xLR44)
  • Comes with new slide-on hardcase
  • Dimensions (H x W x L): 77 x 165,5 x 11,1 mm
  • Approximate Weight: 90g ( 1 Calculator )
More Information
Color Multi
Brand Casio
Manufacturer Part Number CASIO 991 EX
Country of Manufacture China
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On-time Dispatch

We normally ships goods within 1-2 business days after the order is placed by customer .

Customers will receive Shipping Confirmation and the tracking number once the ordered item has been shipped

We ships all online orders via India Post (Registered Post) Which usually take 15 to 30 days depending on the country

We do not ship to PO Box addresses



We accepts only pay-pal. All payments must be made before we start working on your order

Return Policy

If the product you receive is not as described, the seller promises that you may return it before order completion (when you click ‘Confirm Order Received’ or exceed confirmation timeframe) and receive a full refund. The return shipping fee will be paid by you. Or, you can choose to keep the product and agree with the refund amount directly with the seller.

Seller Service

On-time Delivery

If you do not receive your purchase within 60 days, you can ask for a full refund before order completion (when you click ‘Confirm Order Received’ or exceed confirmation timeframe).

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