Casio FX991ES Scientific  Calculator
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    Casio FX991ES Scientific Calculator  (12 Digit)

    4.9
    218 Ratings & 36 Reviews
    820
    845
    2% off
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    Features
    • Scientific Calcualtor
    • 12 Digits Display
    • Powered By Battery and Solar
    Services
    • 10 Days Replacement Policy
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      ValidityCoversType Accepted
      10 days from deliveryDamaged, Defective, Item not as describedReplacement

      If you have received a damaged or defective product or if it is not as described, you can raise a replacement request on the Website/App/Mobile site within 10 days of receiving the product.

      Successful pick-up of the product is subject to the following conditions being met:

      • Correct and complete product (with the original brand/product Id/undetached MRP tag/product's original packaging/freebies and accessories).
      • The product should be in unused, undamaged and original condition without any scratches or dents.

      Know more about the Return Policy here

    Description

    Casio Calculators provide quick and easy results and are widely used by businessmen and students around the world. The Casio FX991ES is a scientific calculator with a Full Dot Matrix Natural Textbook Display. The screen is wide and spacious and this calculator has plastic keys, which are designed and engineered for easy operation.

    Body and Power

    The Casio FX991ES has multiple abilities and is capable of performing 403 functions in all. This calculator has a 10-digit mantissa + 2-digit exponential display with an AAA size R03 battery.

    Complex mathematical calculations such as integration, differential equations, matrix and vector calculations, complex number calculation, CALC function, SOLVE function, base-n calculation. Sin, cos and tan functions help solve geometrical problems easily at the click of a few buttons.

    Intricate steps to obtain results for other algebraic conversations such as fractions, permutation and combination, standard deviation, table function etc. can be avoided since the user-friendly built of this Casio Calculator makes it easy to get quick results to these operations. Market researchers, data collectors and data analysts can easily carry out paired -variable statistics regression analysis, standard deviation and other operations related to organized collection and preservation of data using this Casio FX991ES. The List-based STAT data editor makes viewing and editing of input data in list format and shows data groups with x-data, y-data and frequency and surrounding data.

    The Multi-replay function makes it easy to obtain quick and easy recall of previously executed formulas for editing and re-execution. The Dot Matrix Display features a high-resolution screen, providing beautiful looking graphs every time.

    Logarithmic log, table function and logical operations make calculations easy, quick and convenient. This Casio Calculator has 40 stored scientific constants, which come into effect while carrying out these calculations. Data and information is stored on 9 variable memories and there are 20 pairs of metric conversions available.

    The two way power system is capable of using battery as well as solar power for the calculator thus making optimum usage. This Casio Calculator comes with a new slide on hard case, which makes working on the calculator convenient and protects it from scratches and other impacts.

    With its wide variety of features and specifications, this Casio FX991ES is used extensively by students and other professionals in course of their daily routine. The user-friendly and budget-friendly nature of this Casio Scientific Calculator makes it a good buy.

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    Specifications
    • Brand Name
      • Casio
    • Model No
      • FX991ES
    • Type
      • Scientific
    • Display (Digits)
      • 12
    • Power Source
      • Battery and Solar
    4.9
    218 Ratings
    36 Reviews
    • 5
       200
    • 4
       17
    • 3
       0
    • 2
       0
    • 1
       1
    Most Helpful 
    Positive 
    Most Recent 
    By Certified Buyers 
    5

    991ES is gr8 calc for engg. students .... its a steal at this price

    I have been using the Casio FX991ES for the past 4 yrs. Its a gr8 device for engg. students. The greatest feature is the natural notebook display which allows the user to write fractions and functions in a natural manner.
    For just 100-150 bucks more than the 991MS model its a significant improvement with more memory, larger display, gr8tr function(ex:log10 and u can store stat tables) and easy and quick operations (very helpful during exams).
    Bottomline: go for it !!!!
    READ MORE

    Debarun Majumdar

    Certified Buyer

    11 Dec, 2011

    18
    3
    Report Abuse
    5

    Amaizing

    Best calculator i have ever used. natural notebook dishplay makes easy to write fraction,solution of equations, matrix,integration, differentiation etc.
    user friendly platform
    it has memory to store values
    must buy
    READ MORE

    Ashok sahu

    Certified Buyer

    22 Nov, 2011

    5
    0
    Report Abuse
    5

    Best for Engineering students

    I felt that it is the best klc for engineering students @ very affordable price with trust of flipkart.
    Its operations are user friendly & provides much graphical interface.
    I bought it 4 years before @ 620/-
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    Saurabh Sinha

    Certified Buyer

    23 Nov, 2011

    10
    2
    Report Abuse
    5

    Worth the money.

    Now of course Flipkart is always the best! I've been a regular customer and never have they let me down. Rock bottom prices and lightning speed deliveries!

    The Casio FX991ES is master piece. Once you start using it to the max, you realize that the returns are many times higher than what you paid to buy it!

    The natural number display, the plethora of functions and the smooth finish of the product make you a proud owner of one of the finest pieces of technology.

    Must have for most of the stu...
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    Vivek Todi

    Certified Buyer

    3 May, 2012

    4
    0
    Report Abuse
    5

    Paisa Vasool

    I've been using this calculator for 2 years and had no issues with it so far. It is an excellent product from casio.
    Pros-
    1. textbook display which makes entering fractions very easy.
    2. flexible matrix operations.
    3. conversion tables provided on the cover panel.

    Cons-
    1. Takes time while calculating complex equations. Especially while solving interpolation problems and numerical integration (taylor series, simpsons' rules etc.)
    2. max order of the matrix is 3x3.
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    Vamsi Chivukula

    Certified Buyer

    4 May, 2012

    3
    0
    Report Abuse
    5

    An Engineer's life depends on how well his calculator works.

    This calculator is like a perpetual motion machine. It never needs a battery! (Although I did get the battery that came with it after six months of purchase). Since then, There has been no battery issue. In first six months of Engineering, we don't use the calculator that much, but the battery needed to be replaced. But after that, I have been using it extensively (to the point of doing calculations like 15+7=22 :P along with the engineering functions

    The most useful functions for engineerin...
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    VamsiMohanKrishna Vadrevu

    Certified Buyer

    5 Aug, 2012

    1
    0
    Report Abuse
    5

    extremely useful

    purchased this item 2 weeks ago. working fine. the solar charge pannel is really good. no tension for changing the battery. best buy for engineers & technical students. key buttons are hard plastick made & rigid. good stuff overall.
    READ MORE

    Biplab Roy

    Certified Buyer

    28 Apr, 2012

    1
    0
    Report Abuse
    5

    Best for Engineer..!!!

    One of the best calculator in the current market for engineers and I'll give 5 out of 5...!!!
    It has enough functions which assist in your examination..!!!
    But some of the university and colleges doesn't allow this series calculator in exam..!!!
    READ MORE

    Pratik Patel

    Certified Buyer

    1 Mar, 2012

    1
    0
    Report Abuse
    5

    this product is so good

    this product is good but this product price is high in my nearer shop. this product is useful of the all engineering students. this calculator is use of to matrix multiplication and matrix diterminets and this products is so good for all engineering students.
    READ MORE

    shihora hardik

    Certified Buyer

    25 Feb, 2012

    1
    0
    Report Abuse
    5

    the one for engg students

    i have used this calc for the past 3 years...really amazing one...it has easy to use functions like equations,matrices,solve func this makes engg calculations piece of cake....a definite must buy product
    READ MORE

    Adithya kalliath

    Certified Buyer

    29 Dec, 2011

    1
    0
    Report Abuse
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