The Casio FX-991ESPLUS-2WDTV is a premium scientific calculator from the ES PLUS 2nd Edition Series, designed for secondary school, university, engineering, and science students. Featuring Natural Textbook Display (Natural-V.P.A.M.), a high-resolution dot matrix display, and 417 built-in functions, it enables mathematical expressions to be entered and displayed exactly as they appear in textbooks. With support for advanced functions including calculus, matrices, vectors, complex numbers, statistics, and equation solving, it is an excellent choice for academic studies and professional technical work.
Key Features
417 built-in functions
Natural Textbook Display (Natural-V.P.A.M.)
High-resolution dot matrix display
Multi-Replay function
Matrix calculations
Vector calculations
Complex number calculations
Numerical integration
Numerical differentiation
Equation calculations
CALC function
SOLVE function
Table function
Prime factorization
Scientific constants
Metric conversions
9 variable memories
Answer Memory
Slide-on hard protective case
Calculation Functions
Basic Mathematics
Arithmetic calculations
Fraction calculations
Percentage calculations
Powers and roots
Logarithmic and exponential functions
Scientific notation
Engineering notation
Absolute value
Factorials
Degree, minute, and second (sexagesimal) calculations
Advanced Mathematics
Trigonometric and inverse trigonometric functions
Hyperbolic and inverse hyperbolic functions
Complex number calculations
Matrix calculations (up to 3 × 3)
Vector calculations
Numerical integration
Numerical differentiation
Simultaneous equations
Polynomial equations
Base-N calculations
Coordinate conversion (Rectangular ↔ Polar)
Statistics & Data Analysis
One-variable statistics
Two-variable statistics
Regression analysis
Standard deviation
List-based statistical editor
Permutations and combinations
Random number generation
Random integer generation
Additional Features
Table function
Prime factorization
Scientific constants
Metric conversions
Replay & Multi-Replay
CALC function
SOLVE function
9 variable memories
Design & Materials
Non-programmable scientific calculator
Non-graphing calculator
High-resolution dot matrix LCD
Natural Textbook Display
Durable plastic keys
Ergonomic key layout
Protective slide-on hard case
Colors
Body: White
Keys: White with gray and black function keys
Display: High-resolution monochrome LCD
Case: Protective slide-on hard case
Note: The FX-991ESPLUS-2WDTV belongs to Casio's ES PLUS 2nd Edition series, providing Natural Textbook Display and 417 built-in functions in a non-programmable scientific calculator suitable for advanced mathematics, engineering, and science education.
Power
Power Source: Solar Cell + 1 × LR44 Button Battery
Battery Life: Approximately 3 years (based on 1 hour of use per day)
Automatic Power Off: Yes
Dimensions & Weight
Dimensions (D × W × H): 161.5 × 77 × 11.1 mm
Weight: Approximately 95 g (including battery)
Ideal For
Suitable for:
High school students
University students
Engineering
Mathematics
Physics
Chemistry
Statistics
Science and technology courses
Professional scientific calculations
What's Included
Casio FX-991ESPLUS-2WDTV Scientific Calculator
Slide-on Hard Case
Instruction Manual
Warranty Card (provided by the authorized distributor)
