Casio Scientific Calculator fx 991MS

Casio Scientific Calculator fx 991MS
Rs. 845 Rs. 639 (24% Off)

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Item Details


  • 3 Year's Manufacturer Warranty
  • Brand: Casio
  • 10+2 Digit
  • Two Way Power
  • Matrix calculations
  • Equation calculations
  • Differential and Vector Calculations
  • 2 Line display
  • 401 functions
  • Dimensions: 12.7 x 78 x 154.5
  • Product code: Casiofx-991MS
  • SUPC: 1535018


Casio FX 991MS is a very efficient scientific calculator to solve all your mathematical and scientific equations in seconds.  The Casio Scientific Calculator FX 991MS can perform up to 401 functions with ease. It features plastic keys that are comforting to use. The key operations of this brilliant aid are stored in buffer and you can make the best of the 9 variable memories offered by this scientific calculator. Casio FX 991MS allows you to carry on matrix calculations, equation calculations and vector calculations, metric conversions, statistics too. A battery operated calculator and can revive your smile as it works with solar power too. This calculator has a tough slide-on hard case that withstands rough use and acts as a protective covering for the calculator. It is a 12 digits calculator to solve more complex problems and it features an extra-large high contrast clear display. An additional feature of this calculator is a 2-line display that provides a clear view of the imputed data and the resultant data at the same time. Casio FX 991MS Scientific Calculator offers a multi-replay function that gives you access to review and edit the assigned formula and hence saves effort by allowing speedy rectification. In case, your tasks are more about graphs, Casio FX 991MS is a suitable choice for you as it is equipped with dot matrix facility for viewing and understanding graphs keenly.

For students and finance aspirants too, this scientific calculator is a useful tool to solve statistical problems like standard deviation, regressions analysis, normal distribution and other similar equations. You can find accurate answers to the problems with the tap of your fingers. The Solve function of Casio FX 991MS allows quick solving of equations, devoid of great effort.


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Rating & Reviews 262

  • 4.4 OUT OF 5
    Based on 975 ratings
    5 Star 616
    4 Star 252
    3 Star 52
    2 Star 18
    1 Star 37
  • 97% Recommend

    Based on 199 recommendations. Would you recommend this item?

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  • name99
    Verified Buyer
     Most Helpful Positive Review (250)
    Jul 02, 2015
    nice calculator

    it is very good. but it is better to purchase casio fx 991 ES plus,as it has advantage of correcting the values individually which is not possible in  read more

    View 250 Positive Reviews
  • Abhishek
    Verified Buyer
     Most Helpful Critical Review (12)
    Jan 07, 2015
    I need atleast a year to properly rate

    I have not tested it completely.A calculator must last long.In order to rate it I need to see its performance atleast for a year.Then I can rate it.Bu  read more

    View 12 Critical Reviews
Displaying Reviews 1-10 of 262
name99 5 Reviews
Verified Buyer
Jul 02, 2015
nice calculator

it is very good. but it is better to purchase casio fx 991 ES plus,as it has advantage of correcting the values individually which is not possible in 991 ms. But this calc is also very good.

Was this review helpful? YES 2
akash 2 Reviews
Verified Buyer
Oct 16, 2013
definitely for heavy calculations

the calculator that the casio is providing you is of top notch quality and so it is in performance .the casio is a trusted brand,so no need to worry about after sales services.there are lot of functions in the calculator and it would definitely exceed your expectations,though the screen clarity is better in the other 991 model i suppose it was es..overall awesome calculator

Was this review helpful? YES 0
nachiketshivrame21 1 Review
Verified Buyer
Jan 04, 2016
Nice casio..must have to all engineering students

This calci is very easy to use as it has all the latest and easy features which an engineering student should have... I would suggest it is an pretty nice gadget. Also the quick delivery of item has impressed me a lot.

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Sid 4 Reviews
Oct 01, 2013
Must have for all engineering students

I don't think any engineering student in India needs an introduction to this device! I used the FX-100 and FX-991 during my engineering days and they were used so much that I was afraid I'd wear them out by sheer usage! The best feature of 991MS has to be its ease of use. Even if you're using scientific calculators for the first time ever, you'll figure out how to use them in no time. The 991MS provides practically all formulas/operations that you could possibly need (strictly talking about engineering or scientific operations). The simple but rugged calculator just keeps on working without any issues whatsoever. Haven't had the chance to use it much after engineering and I don't think this would be the best product for financial/consulting based industries but a very useful product nevertheless.

Was this review helpful? YES 1
arindam 1 Review
Verified Buyer
May 17, 2014
its the perfect thing for life

its a good calculator , its been a helpful decision to buy this thing, it will help me a lot in my is one of the top models it contains 401 functions, matrices, vectors, calculus, integration and lot more ….. it is also having two way power. So it is a final perfect thing.

Was this review helpful? YES 0
Divu 8 Reviews
Verified Buyer
May 30, 2014
Casio Scientific Calculator fx 991MS

good product Product centricity: Concentrate only on product feedback and DO NOT include service or seller feedback. Reviews with such content will NOT BE made live Simple language: Keep the language simple, light and in your own words Be crisp: If the details run long, break the review into readable short paragraphs and bullets No profanity: Profanity, copyrighted comments or any copied content must be avoided Share your experience: Explain what you liked and disliked about the product. The most helpful reviews are the ones that help readers know exactly what to expect Pros & cons: Select or add appropriate pros & cons to give a quick summary of your review to the reader Best usage: Mention best uses of the product and why should one buy it

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Rui 2 Reviews
Verified Buyer
Aug 29, 2015
Very Efficient solar powered calculator

Since Casio is a trusted brand I didn't mind paying little extra for a two way powered calculator and I am sure it will last a lifetime . I recommend this over battery powered since there is little chance of leakage and also one can save on expensive batteries . Solar panel works efficiently even from inside the house.

Was this review helpful? YES 0
night baron 1 Review
Verified Buyer
Oct 12, 2013
good product

its a great product. every time i get the products in good condition, it makes me shop still more:-) i would like to recommend it to every engineering student. the only problem with this calculator is, its very much complicated to make scientific calculations for which it was meant to be. i wish all the keys were seperate...

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Hari 1 Review
Verified Buyer
Sep 05, 2015
About this product

I received it correctly and quickly. It works good. I recommend it.

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sonu 3 Reviews
Verified Buyer
Nov 03, 2014
It awesome

This product is a nice product. Let me mark first, it has the best sleek outlook out of all the models of CASIO. It has a lot of functions. The most useful are- 1. Trigonometric Functions 2. Logarithmic 3. Factorials 4. Permutation/Combinations 5. Solving Equations 6. Definite Differential+Integral Calculus can be solved 7. Complex no. form 8. Matrix 9. Vectors 10. And lot more. It has a life of 17000hours[the battery] which is 708 days of continuous i.e. 24x7 which is quite impossible.

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Most Recent Reviews
abhishek.royalmitra 1 Review
Verified Buyer
Jan 26, 2016
Delivery was faster than expected. Packing of the article was very safe. It is a very good calculato

It is a very good calculator. Happy with the service of Snapdeal.

Was this review helpful? YES 0
Ramakrishna 1 Review
Verified Buyer
Jan 25, 2016
Casio Scientific Calculator

Though the new calculator ordered was packed excellent, I did not feel it was a brand new calculator. I felt it was used for at least some time

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VAMSI 2 Reviews
Verified Buyer
Jan 23, 2016
It's nice.

good product.

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akashpandi 1 Review
Verified Buyer
Jan 18, 2016
Awesome product

Really nice one to buy And delivery was perfectly on time Kudaos to snapdeal

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liginattumalil7 2 Reviews
Verified Buyer
Jan 14, 2016
Superrrr it is a good product

Good one no problems

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Casio Scientific Calculator fx 991MS
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Casio Scientific Calculator fx 991MS

Rs. 845

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