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Casio FX-991ES Plus Scientific Calculator

4.79207 product ratings

Electronics-Kingdom (1130)
95.9% positive feedback

Price:

US $29.99

ApproximatelyC $41.49

Free shipping

Estimated delivery Tue, Nov 5 - Fri, Nov 22

Returns:

30 days return. Buyer pays for return shipping.

Condition:

New

Easily compute the most complex of mathematical problems, equations, and scientific formulae with the Casio FX-991ES Plus scientific calculator. Moreover, with batteries installed, you can safely use it for weeks together without worrying of replacing them.

All listings for this product

item 1 Casio FX-991ES Plus Scientific Calculator â Visually Perfect Algebraic Method
C $10.00
item 2 Casio FX-991ES Plus C Scientific Calculator -Tested - Free Shipping
C $24.89
+C $14.03 shipping
item 3 Casio FX-991ES Plus Edition Scientific Calculator Trigonometrical Statistics
C $41.49
Free shipping
item 4 Casio FX-991ES Plus Scientific Calculator GREAT BUY!
C $21.99
+C $21.00 shipping
item 5 Casio FX-991ES Plus Scientific Calculator
C $20.75
item 6 Casio FX-991ES Plus Scientific Calculator Fx 991 Es + FX991ES New CE Logo Sealed
C $48.18
Free shipping
item 7 New Casio FX-991ES Plus Scientific Calculator With Free Worldwide Shipping
C $49.99
Last oneFree shipping
item 8 Casio FX-991ES Plus Scientific Calculator Fx 991 Es + FX991ES New CE Logo Sealed
C $50.31
Free shipping
item 9 Casio FX-991ES Plus 2nd Edition Scientific Calculator
C $40.81
+C $13.82 shipping
item 10 Casio FX-991ES Plus Scientific Calculator
C $34.58
item 11 Casio FX82ES Plus 2nd Edition Scientific Calculator Plus Nonprogrammable
C $27.61
+C $27.67 shipping
item 12 CASIO Scientific Calculator fx-991ES PLUS-2
C $58.10
Free shipping
item 13 Casio FX-991ES Plus-2nd Edition Scientific Calculator With Bill Original
C $34.46
+C $27.29 shipping
item 14 Casio FX-991ES Plus Scientific Calculator
C $41.49
item 15 Casio FX-991ES Plus-2nd Edition Scientific Calculator With Bill Original
C $34.57
+C $27.67 shipping
item 16 Casio FX-991ES Plus Scientific Calculator 2nd Generation With Bill and Invoice
C $38.04
+C $27.67 shipping
item 17 Scientific Calculator Casio FX-991ES Plus For mathmatics for students and office
C $29.04

See all 17

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

4.8

4.8 out of 5 stars based on 203 product ratings

203 product ratings

183 users rated this 5 out of 5 stars
12 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 117 reviews

4 out of 5 stars
by twilliams9279Mar 15, 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 hendersonnhMay 18, 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 aguyonthebuySep 05, 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 sousabayeJan 28, 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 helius619Sep 29, 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 1 of 2

Casio FX-991ES Plus Scientific Calculator

All listings for this product

About this product

Product Information

Product Identifiers

Product Key Features

Additional Product Features

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

Save on Calculators

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