Casio FX-991EX Classwiz Non-Programmable Scientific Calculator, 552 Functions with Menu Driven Interface

(10 customer reviews)


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Non-Programmable Scientific Calculator with 552 Functions

4-times better resolution than Casio 991ES Plus for easier viewing on long expressions

Natural Textbook Display- Input and display fractions, powers, logarithms, roots, and other mathematical formulas and symbol just as they appear in textbooks

Scientific Calculator with inbuilt QR Code function — QR Code feature generate graphical visualization of given equation in your smart device. It also helps you to access calculator user manual on your smart phone.

Faster than any previous Casio Non-Programmable Scientific Calculator

Up to Four Degree Simultaneous and Polynomial Solver

Numerical Integration, Differentiation, Statistics, Matrix, Vector Calculation

Colour coded keypad for easy key differentiation for Secondary and tertiary functions.

Dual Powered – Solar & Battery so that you can use for long time without the need of battery replacement

Attractive and elegant look with metallic keys

Recommended by Engineering & UG Maths Students

3 Years All India Manufacturer Warranty

Country of Origin: China

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Returnable (Not Applicable For Health and Personal Care Items): 7 Days

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10 reviews for Casio FX-991EX Classwiz Non-Programmable Scientific Calculator, 552 Functions with Menu Driven Interface

  1. Krishna Gayari

    Best calculator so far allowed in the exams. Display, design and interface are much improved in this model, and equations, matrices etc can be calculated of degree 4, 4×4 etc. The calculations are also much faster than the earlier models like 991es plus or 991ms, you can compare the speed by yourselves.

  2. Saleesh

    The best calculator in the world!Trust me, I read through almost 1000 reviews online across all types of calculators before finally buying this.Do not waste money on costly graphing calculators. This cheap calculator has a QR code system. You do the calculations and once you get the equation, generate the QR code and scan it with a Casio app on your mobile. TaDa! You can see a much better graph than the one you get from a costly graphing calculator.2ndly, if you are looking for graphing calculator functions, it is better to install an app called Calc84 on your mobile rather than buying a costly graphing calculator like Ti 84 plus CE.Moreover, you can take this to any exam hall.Far better screen resolution than any other calculator in this price range.Looks sexy too!Amazing plastic that is strong and at the same time lightweight.

  3. Matruprasad Chand

    Really great functionality. The 4X4 matrix solving ability makes it far better if you are dealing with that. The build quality is really great and feels lightweight but sturdy. I would however suggest you look for this model offline and check prices as I found the online price to be about ₹100 more than the offline ones.

  4. Shabbir Udaipurwala

    I really love the calculator. It is portable and light weight. I love the Carbon Fibre design on the inside of the calculator. I find two extremely miniscule errors. Although the calculator itself is very light weight, the case is almost twice as heavy. It’s not an issue but I would suggest Casio to reduce the weight of the calculator case. Another thing is that I would love to have a variant in black colour. This would totally complement the look and feel of the calculator. Otherwise there is no error in the internal systems whatsoever.

  5. Sudesh Chandar

    I was in the market for a good calculator and this one from casio fit the Bill. The other choices were from HP and TI because I wanted to practice RPN notation. But these were priced higher than Casio. So I finally decided on the FX-991 EX. It has all the functions that a engineer needs with a spread sheet application too, And has all the constants an engineer needs for his work. My only dislike is that the display LCD is a little dark and requires a little bit of bright light to read the display

  6. Arun Kumar

    It’s the best calculator available in the market. I’m using casio 991ms from last four years, no issues. So i decided to purchase it’s new version fx991ex. It’s just wow!I’m writing this review after 2 months usage.Do not forgot to register for it’s warranty online.Here’s it’s FEATURES:-Number of Functions : 552552 Functions for easy and fast Calculations for all your Mathematical and engineering problemsMenu Driven User InterfaceMenu Driven Interface makes it easier for students to find out required function and execute it easily.High Resolution LCDHigher resolution increases the amount of information that can be displayed and so makes it easier to view numerical formulas and symbols.High Speed CalculationFour Times faster than previous model Casio fx-991ES PlusQR CodeQR Code feature generate graphical graphical visualization of given equation in your smart device. It also helps you to access calculator user manual anytime, anywhere.Advanced Polynomial & MatrixSolve up to 4 degree polynomial, inequalities and simultaneous equation with four variables. Define and calculate up to 4 by 4 matrixNatural textbook displayInput and display fractions, powers, logarithms, roots, and other mathematical formulas and symbol just as they appear in textbooksDual PowerYour calculator works on battery and solar power both, hence it goes on for long without the need of changing battery.Stylish BodyA special surface process applied to the body results in an elegant texture and design. Along with this, the Calculator has some metallic keys for very elegant look.Japanese Trusted QualityCasio Calculators comply with ISO 14001, and ROHS policies and abolish usage of harmful substances like lead (Pb), mercury (Hg), cadmium (Cd), hexavalent chromium (CrVI), polybrominated biphenyls (PBB) and polybrominated diphenyl ethers (PBDE) for an effective environmental management system (EMS). Casio pride itself for delivering high quality products and services while being environmentally conscious.Made by Recycled PlasitcThe calculator body is made by recycled plastic support green environment.3-Year WarrantyCasio Scientific Calculator comes with 3-year of warranty (given by manufacture).

  7. Akash U Gajinkar

    I really like the design of the Calci and it’s faster than my previous Fx350Es Well it’s after 10years, My fx350Es died from Screen Shot Blackening and blown of IC circuit internals after getting it cross-checked. Well For Fx350Es I had replaced its battery Ones and that’s way long survived for 10years. Anyways this Modern looking Fx911Ex looks to be cool, stylish, lightweight, faster with 3yrs Warranty. Hope at this time it will survive more than 30yrs.Next, this QR generating Code is an amazing Feature, like generating secret code numbers or any mysterious top-secret number.

  8. Prakash K S

    After reading out quite a few reviews of different calculators, i saw this model which is close to 4 times faster than its earlier generation mode. Has tons and tons of modes which is highly useful in technical courses for students. Quality is very good and buttons have good tactical feel. Comes with a nice plastic cover which can be pushed behind while use and same used as front cover during storage.Bought white one and felt made a good decision of buying it (rather than the black one which i normally have bought earlier). Only thing is we have to keep it tidy to have the original whiteness… 🙂

  9. prithvipal singh

    The best casio calculator with functions like matrix, polynomial equations, inequalities etc. Everything basic an engineering student requires, got this for around INR 1100. Can be easily carried in a pocket. Best part is the display, it is pixelated.IMPORTANT ALERT:PS: some colleges might not allow this scientific calculator as it can make complex calculations like matrix inversion and multiplication very very easy.Remember to Register for warranty.

  10. Ankur Singh

    This calculator is awesome.First off, I’m a college student in Delhi, studying in a IIT. I have been using this calculator for the past two months, and it has performed remarkably . It can solve most equations, can differentiate and integrate functions, solve for X, show your answers in multiple forms, and it has a nice and crisp display which is just like writing on a paper. Its wide variety of functions has made it the number 1 calculator used in our college, and everyone recommends it.I got to know about this calculator when Casio did marketing inside our college.Also, you can use this for your SAT and ACT exams, as well as every other exam out there.Look no further, just buy this oneIt has really helped in excelling my performance in my semester exams.

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