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Casio fx-991ES Plus Scientific Calculator

417 Functions - Textbook Display, Dual Power, Hard Shell Cover - 15 Digits - Dot Matrix - Battery/Solar Powered - 6.4" x 3.1" x 0.4"

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Product Highlights

  • Product Type: Scientific Calculator
  • Number of Functions: 417
  • Power Source: Battery/Solar
  • Calculator Features: Dual Power, Hard Shell Cover, Textbook Display
  • Height: 6.4"
  • Width: 3.1"
  • Display Screen Type: Dot Matrix
  • Number of Display Digits: 15
Ship Weight: lbs.
$29  CAD
Retail Price: $32.04
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Product Information

This top of the range scientific calculator presents 403 mathematical functions on its exceptionally clear and easy-to-read Natural Textbook Display. This ever popular model is now available with Random Integers and an improved equation mode, as well as solar power.

General Information
Manufacturer:Casio Computer Co., Ltd
Manufacturer Part Number:FX-991ESPLUS
Manufacturer Website Address:
Brand Name:Casio
Product Model:fx-991ES Plus
Product Name:fx-991ES Plus Scientific Calculator
Product Type:Scientific Calculator
Technical Information
Number of Functions:417
  • Fraction Input Mode
  • Improved Equation Mode
  • Random Integer
  • Repeat Function
  • 24 Levels of Bracket
  • Variable Memories
  • Percentage
  • Exponential
  • Logarithmic
  • Power/Root
  • Inverse
  • Logical Calculation
  • Complex Numbers Calculation (a+bi /r??)
  • Parentheses
  • Output in ? -form
  • Output in ?-form


  • Trigonometric/Inverse Trigonometric
  • Hyperbolic/Inverse Hyperbolic
  • Combinatoric/Permutation
  • Random Number Generator
  • Polar & Rectangular Coordinates Conversion
  • Calculates with Fractions (two modes)
  • Sexagesimal & Decimal Conversion
  • Gradian, Degree & Radian Calculation


  • Lists of Based Statistic
  • Variable Statistic
  • Standard Deviation
  • Linear
  • Quadratic
  • Solve/Calc
  • Numeric Integration
  • Numeric Differentiation
  • ?()-


  • Linear System
  • Polynomial


  • Determinant
  • Inverse Matrix


  • Internal/ External Product
  • Physical Constant
  • Metric Conversion
Calculator Features:Textbook Display, Dual Power, Hard Shell Cover
Display & Graphics
Number of Display Digits:15
Display Screen Type:Dot Matrix
Battery Information
Power Source:Battery/Solar
Physical Characteristics
Weight (Approximate):95 g
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