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Casio FX-991ES Plus Scientific Calculator

4.79207 product ratings

Style in Class (10257)
99.1% positive Feedback

Price:

US $46.20

ApproximatelyAU $69.97

Free postage

Estimated delivery Mon, 22 Jul - Tue, 13 Aug

Returns:

30-day returns. Seller pays for return postage.

Condition:

Brand New

Percent Calculation (scientific calculator function). Scientific Constants. Auto Power Off. Power Function (Square). Power Function (Cube). Power Function. Power Function (Square Root). Physics- and chemistry-related functions.

About this product

Product Information

Easily compute the most complex of mathematical problems, equations, and scientific formulae with the Casio FX-991ES Plus scientific calculator. The Casio 991ES calculator works with a dual power source, the primary being a built-in solar power cell that keeps it running for hours without any batteries. Moreover, with batteries installed, you can safely use it for weeks together without worrying of replacing them. You can practice all sorts of mathematical problems that appear at the GCSE, A Levels and above, with this Casio FX-991ES Plus scientific calculator. The Casio 991ES calculator resolves complex calculations, integrations, and logarithms in just a few steps.

Product Identifiers

Brand
Casio
MPN
FX991MS/ES
UPC
4971850182276
Model
FX-991ES Plus
eBay Product ID (ePID)
92844524

Product Key Features

Power Source
Battery/Solar
Size
Handheld
Key Size
Regular
Type
Scientific

Additional Product Features

Display Type
Large

All listings for this product

item 1 CASIO Scientific Calculator fx-991ES PLUS-2
AU $69.97
Free postage
item 2 Casio FX-300ES PLUS Scientific Calculator with Directions
AU $33.32
+AU $46.96 postage

4.8

4.8 out of 5 stars based on 207 product ratings

207 product ratings

186 users rated this 5 out of 5 stars
13 users rated this 4 out of 5 stars
1 users rated this 3 out of 5 stars
0 users rated this 2 out of 5 stars
7 users rated this 1 out of 5 stars

Would recommend

Good value

Good quality

Most relevant reviews

See all 120 reviews

4 out of 5 stars
by twilliams927915 Mar, 2011
Easy to Use
I bought this calculator because it was the best allowed for use on my exams (best in terms of its features and capablities). The "pretty print" font feature is great too. It can even perform integration and differentiation of a function at a specific value of the independent variable (or over a specified nonvariable range. Unfortunately, it can't produce the function that is the derivative, etc. of a given function like the TI89 (but then if it could it probably wouldn't be allowed on your exam anyhow). Anyway, this thing is pretty decent for calculus and physics - for stats, use a TI83 instead if you can. It is more than adaquate for business types and decent for science students too assuming your professor is against more advanced models. Engineers already know they'll be needing a bit more power. Hope this helps you make an informed purchase decision.Read full review
5 out of 5 stars
by hendersonnh19 May, 2020
Equation Solver
I bought the Casio FX-991 ES. Fantastic for using Newton's law of approximation to solve equations like sinδ = a + bcos(δ + β) (a, b, β constants). Just substitute the ANS key for δ in the equation and keep hitting the "=" button till the answer doesn't change (converges).
Verified purchase: Yes | Condition: New
5 out of 5 stars
by aguyonthebuy05 Sep, 2018
Best Simple Display Calculator I've Used
Best non graphing calculator for engineering courses I've used. Best part is being able to plug in human readable fractions.
Verified purchase: Yes | Condition: New
5 out of 5 stars
by sousabaye28 Jan, 2017
Precise with great features
I'm a student and this calculator helps me a lot to accomplish the math exercises required by class. Many functions are included, more than I will need actually but I loved the design, the big screen, the price and the ease of use.
Verified purchase: Yes | Condition: New
5 out of 5 stars
by helius61930 Sep, 2020
Great for Digital Systems Design
I recommend this model for CS studies and Electrical Engineering. It's real easy to calculate in non decimal base: base 2 8 and 16 and to convert it back to decimal. I think there are calculator models with a more robust screen. I guess that's why it's relatively cheap
Verified purchase: Yes | Condition: New

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Picture 4 of 4

Casio FX-991ES Plus Scientific Calculator

About this product

Product Information

Product Identifiers

Product Key Features

Additional Product Features

All listings for this product

item 1 CASIO Scientific Calculator fx-991ES PLUS-2

item 2 Casio FX-300ES PLUS Scientific Calculator with Directions

Ratings and reviews

Most relevant reviews

Easy to Use

Equation Solver

Best Simple Display Calculator I've Used

Precise with great features

Great for Digital Systems Design

Best Selling in Calculators

Casio fx-8200 AU Classwiz Scientific Calculator - FX8200AU

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