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.

It is good, sturdy and a very reliable product. It is difficult to learn using it, but it is just a skill issue, so no worries. I would recommend buying

Exelente me llegó antes y muy buen producto calidad buen protegido

Works great for my CEGEP math

Excellent

Excellent , very Useful

Exactly what I wanted