Casio FX-991CW Classwiz Non-Programmable Scientific Calculator

I've been using the Casio 991CW for a while now, and I must say—it’s hands down one of the most versatile and powerful scientific calculators I’ve ever owned. Whether you're a student, an engineer, or someone who frequently deals with complex calculations, this calculator is an absolute must-have. Key Features That Impressed Me: Matrix Calculations: Handling matrices has never been easier. The 991CW allows you to perform operations like addition, subtraction, multiplication, and even find determinants and inverses with ease. This is a lifesaver for linear algebra problems! Probability Calculations: As someone who deals with statistics, the built-in probability functions are incredibly handy. Calculating combinations, permutations, binomial, and even more complex probability distributions is quick and straightforward. Equation Solving: The equation solver is a gem! Whether it’s linear, quadratic, cubic, or even systems of equations, the Casio 991CW handles them effortlessly. No more struggling with lengthy manual calculations. Integration & Differentiation: Yes, you read that right—it can perform both definite integrals and derivatives! This feature is a game-changer for calculus students. It provides accurate results, saving time and reducing errors during complex problem-solving. Other Useful Features: Complex number calculations Vector calculations Base-n conversions (binary, octal, decimal, hexadecimal) Statistical calculations (mean, standard deviation, regression, etc.) Scientific constants readily available for quick use High-resolution display that makes reading long expressions super easy Build Quality & Usability: The sleek, modern design feels premium, and the interface is intuitive. The Natural Textbook Display makes it easy to enter and view expressions just as they appear in textbooks, which is incredibly helpful for accuracy. Battery Life: It’s solar-powered with battery backup, ensuring it’s always ready when you need it most. Final Thoughts: The Casio 991CW is not just a calculator; it’s a comprehensive math assistant. It handles everything from basic arithmetic to advanced calculus and statistics with impressive precision. If you’re in the market for a reliable, feature-packed scientific calculator, look no further. This gorgeous-looking calculator is absolutely value for money! Highly recommended!

It has a modern design and is very easy to use. It has so many functions that many other calculators of the same range cannot offer. I am using it for my engineering studies and it offers all the functions I need. Buttons are of good quality except I think the on button which is small but overall have a good button quality. It has solar charging too and you won't need to change the battery often. You can carry it in your pocket. You can also change the contrast of the screen for better viewing at different lighting. Casio has made a truly wonderful product.

Light weight. Black in colour. Comfortable to use. Keys/buttons are very smooth. Brightness and readability are not very good but decent enough. Slightly confusing to operate initially but with practice, it gets better. Allows matrix calculations till 4 × 4 matrices. Allows polynomial factorisations till degree 5. And so much more.

Product is very good but i get used product.

Does what a damn calculator should do. Ofc perfect.

I've been using the Casio FX-991CW Classwiz for a few weeks now for my pg and physics courses, and it has quickly become an essential tool. If you’re a student or professional looking for a powerful yet exam-safe scientific calculator, theit is a smart investment. It’s packed with features, easy to use, and built with reliability in mind. Runs on solar + battery power. It handles everything from basic arithmetic to matrix operations, complex numbers, integrations, differentiation, and equation solving with ease. The response time is fast, and calculations are accurate. Allowed in most exams, including competitive ones, since it's non-programmable. No graphing on the device itself — QR codes take you to the graph on your phone.

Nice 👍

I recently bought the CASIO FX-991CW Classwiz Scientific Calculator from Amazon, and it has been a fantastic purchase. As someone who often handles complex calculations, I needed a reliable calculator, and this one does the job perfectly. Build Quality and Design The build quality of this calculator is great. It feels sturdy and well-made, ideal for daily use. The buttons are easy to press and respond quickly, making it easy to enter numbers and functions accurately. The display is clear and readable, but not up to the mark. Functionality and Features The FX-991CW has many useful functions. It can handle basic arithmetic, trigonometry, and statistics, and it even has advanced features like solving equations and matrix calculations. The natural display feature is particularly helpful because it shows mathematical expressions as they appear in textbooks, making it easier to understand and check your work. This calculator is non-programmable, which I find very useful. While some might prefer programmable calculators, I like the simplicity and reliability of a non-programmable one. It removes the risk of errors from incorrect programming and ensures that all calculations are accurate and dependable. Advantages - Strong Build Quality: The sturdy construction ensures long-term durability, making it suitable for frequent and rough usage. - Wide Range of Functions: With capabilities ranging from basic arithmetic to advanced equation solving, it meets the needs of both students and professionals. - Non-Programmable Design: Eliminates the risk of programming errors, ensuring dependable and consistent results. - User-Friendly Interface: The intuitive menu system and comprehensive manual make it easy to use for people at all skill levels. Disadvantages - Lacks Graphing Functions: Users requiring graphing capabilities will need to look at more advanced models, as this feature is not included. - Step-by-Step Verification: The calculator does not allow for checking intermediate steps in complex calculations, making error tracking more challenging and disrupting the flow of problem-solving. Value for Money The Calculator is priced at Rs. 1595, which might seem costly compared to other calculators. However, considering its extensive range of features and reliable performance, it offers excellent value for money. It provides many features typically found in more expensive models, making it an affordable yet powerful tool for students, professionals, and math enthusiasts. Overall, every penny spent for this calculator is worthy. Rating Overall, I am very happy with the CASIO FX-991CW Classwiz Scientific Calculator. It has become an essential tool for my daily work, helping me handle even the most complex calculations confidently and accurately. I highly recommend this calculator for its reliability, functionality, and ease of use. And I would rate 4.5 out of 5.