Casio fx-991CW Advanced Scientific Calculator
Rating
Product Overview
The Casio fx-991CW is an advanced scientific calculator featuring a high-resolution 4-tone display and natural textbook display for enhanced comprehension. It offers over 540 functions, including numeric calculus and matrix solving. Ideal for engineering, science, and exam use, it includes a math catalog for constants and conversions, and QR functionality for graphing results. Its durable design ensures longevity in various environments.
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Product Specifications
Size & Weight
Features
This function allows you to solve for unknown variables in equations directly on the calculator. Instead of manually manipulating equations, you can input the equation and find the solution, saving time and reducing errors, especially useful for complex algebraic problems.
The equation solver function allows users to solve complex equations directly on the calculator, saving time and reducing errors. This is particularly useful for algebraic problems and enhances the calculator's versatility.
This function enables you to perform operations on matrices, such as addition, subtraction, multiplication, and finding determinants and inverses. Useful for linear algebra calculations in subjects like engineering, physics, and computer graphics.
The matrix calculation function enables users to perform operations such as addition, subtraction, multiplication, and finding determinants. This is beneficial for linear algebra calculations in engineering, physics, and computer graphics.
This function allows calculations involving complex numbers, including addition, subtraction, multiplication, division, and finding magnitudes and arguments. Simplifies calculations in electrical engineering, quantum mechanics, and other fields involving imaginary numbers.
This calculator does not support complex number calculations. Users needing this functionality may need to consider other models designed for electrical engineering or advanced physics applications. This is a limitation for some users.
This function allows you to perform calculations in different number systems, such as binary, octal, and hexadecimal, in addition to decimal. Useful for computer science and digital electronics, where these number systems are frequently used.
The absence of base-N calculation functions means it's less suitable for digital electronics or computer science tasks. Most general users will not require this function, but it can be useful in specific situations. Consider other models if this is needed.
This function enables you to perform statistical analysis, including calculating mean, standard deviation, variance, regression, and distributions. Useful for statistics courses, data analysis, and research projects.
The inclusion of statistical calculation functions makes this calculator an excellent tool for statistics courses and data analysis projects. It can calculate mean, standard deviation, variance, and more, making it versatile for academic and professional use.
This function allows you to easily convert between different units of measurement, such as length, mass, volume, and temperature. Saves time and reduces errors when working with different units in physics, chemistry, or engineering problems.
The unit conversion function is very useful for quickly converting between different units of measurement, saving time and reducing errors in physics, chemistry, and engineering problems. This feature enhances the calculator's practicality for various applications.
SHOPSTAFF Rating Score
The Casio fx-991CW is a feature-rich scientific calculator suitable for students and professionals. Its high-resolution display and extensive functions make it a versatile tool for various mathematical tasks. Durability is good, and the Casio brand is reliable.
Brand & Manufacturer Details
Key Highlights
- High-resolution display
- Extensive function set (540+)
- Natural textbook display
- Matrix Solver
Considerations
- Avoid dropping the calculator
- Keep away from moisture
- Do not expose to extreme temperatures
- Be mindful of battery life
Recommended For
- High school students
- College students
- Engineers
- Scientists
Not Recommended For
- Young children
- Professionals requiring advanced graphing
- Users needing programmable functions
Suitable For
- Classroom
- Office
- Homework
- Exams
Not Suitable For
- Advanced engineering simulations
- High-level statistical analysis
- Complex financial modeling
Frequently Asked Questions (FAQ)
Q.I'm a student and need a reliable calculator for exams. Is this Casio model suitable?
Q.Does this calculator have a natural textbook display, and how does it improve the user experience?
Q.I need a calculator for advanced math functions like integration and matrix operations. Does this calculator support these?
Q.I'm looking for a calculator with good memory capabilities. How does this calculator handle memory and variables?
Q.I'm concerned about the calculator's durability. Is it suitable for daily use in a classroom or for exams?
Q.I want a calculator that's easy to navigate and use. Is this Casio model user-friendly?
Q.I see that this calculator has a QR code function. What is it used for?
Q.I am hesitating between this model and the fx-115es+. What are the key differences?
SHOPSTAFF Rating Ranking
Casio FX-991ES Plus-2nd Edition Scientific Calculator with Natural Textbook Display and 417 functions.
| Display Digits | 10 + 2 digits | Display Type | LCD (dot-matrix) |
| Power Source | Solar & Battery | Number of Functions | 417 |
| Memory | - locations | Fractions | Yes |
| Complex Numbers | Yes | Statistics Functions | Yes |
| Regression Analysis | - | Unit Conversions | - |
Casio fx-991CW Advanced Scientific Calculator with High-Res 4-Tone Display and 540+ Functions.
| Display Digits | - digits | Display Type | High-Resolution 4-Tone |
| Power Source | Solar Powered | Number of Functions | 540+ |
| Memory | 9 locations | Fractions | Yes |
| Complex Numbers | - | Statistics Functions | Yes |
| Regression Analysis | - | Unit Conversions | Yes |
Casio
fx-115ES Plus 2nd Edition Advanced Scientific Calculator
$16.99(incl. tax)Amazon price as of 2025-09-29
Casio fx-115ES Plus 2nd Edition: Advanced scientific calculator with Natural Textbook Display and 280+ functions.
| Display Digits | 16 digits | Display Type | LCD |
| Power Source | Solar Powered | Number of Functions | 280 |
| Memory | 9 locations | Fractions | Yes |
| Complex Numbers | Yes | Statistics Functions | Yes |
| Regression Analysis | Yes | Unit Conversions | Yes |
Texas Instruments
TI-36X Pro Engineering/Scientific Calculator
$20(incl. tax)Amazon price as of 2025-09-24
TI-36X Pro: Engineering/Scientific calculator with MultiView display, ideal for high school through college.
| Display Digits | - digits | Display Type | LCD |
| Power Source | Battery Powered | Number of Functions | - |
| Memory | - locations | Fractions | Yes |
| Complex Numbers | No | Statistics Functions | Yes |
| Regression Analysis | Yes | Unit Conversions | Yes |
TI-30XIIS: A fundamental two-line scientific calculator for high school math and science with solar and battery power.
| Display Digits | 12 digits | Display Type | LCD |
| Power Source | Solar & Battery | Number of Functions | - |
| Memory | 5 locations | Fractions | Yes |
| Complex Numbers | No | Statistics Functions | Yes |
| Regression Analysis | Yes | Unit Conversions | Yes |
