FX-991ES Plus-2 Review
At a Glance
Our Verdict
Best for
High school and early college students (Algebra, Pre-Calculus, Statistics, Physics, Chemistry) who need a powerful scientific calculator without graphing or programming.
Value
Excellent
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Overview
The Casio FX-991ES Plus-2 is a highly capable scientific calculator, offering a comprehensive suite of 417 functions and Casio's intuitive Natural Textbook Display. It's an excellent choice for high school and early college students, providing robust functionality for a wide range of mathematical and scientific disciplines without the complexity or cost of a graphing calculator.
Detailed Review
Key Features
- Natural Textbook Display (Natural V.P.A.M.)
- 417 Functions
- Dual Power (Solar + Battery)
- Equation Solver (Quadratic, Cubic, Simultaneous Equations)
- Matrix and Vector Calculations
- Complex Number Calculations
- Calculus (Definite Integration, Differentiation)
- Statistical Calculations (Standard Deviation, Regression Analysis)
- Base-N Calculations
- 40 Metric Conversions
- Physical Constants Library (40 values)
- Random Integer Generation
- Prime Factorization
Reasons to Buy
- Comprehensive function set (417 functions) for its class.
- Natural Textbook Display significantly improves readability and input.
- Dual power source ensures reliability.
- Affordable price point for the features offered.
- Intuitive interface and easy to navigate for a scientific calculator.
- Durable build quality suitable for student use.
Reasons to Avoid
- Lacks graphing capabilities, which are required for some advanced math courses.
- No programming functionality for user-defined programs.
- Does not feature a Computer Algebra System (CAS).
- Display resolution is lower than newer generation scientific calculators (e.g., Casio FX-991EX).
- Not suitable for university-level engineering or mathematics courses that mandate graphing or CAS calculators.
Technical Specifications
- display type
- Natural Textbook Display (Dot Matrix)
- screen size
- n/a
- battery type
- LR44
- power source
- Solar + Battery
- number of functions
- 417
- programming capability
- no
- graphing capability
- no
- CAS
- no
- connectivity
- None
- dimensions
- 162 x 80 x 13.8 mm (approx.)
- weight
- 100 g (approx.)
- build quality
- Standard plastic with slide-on hard case
At a Glance
Our Verdict
Best for
High school and early college students (Algebra, Pre-Calculus, Statistics, Physics, Chemistry) who need a powerful scientific calculator without graphing or programming.
Value
Excellent
As an Amazon Associate I earn from qualifying purchases.