Features & Benefits
- High-quality materials and craftsmanship
- Designed for maximum comfort
- Versatile and stylish
- Durable and long-lasting
- Available in a range of sizes and colors
- Perfect for any occasion
Item #:
77918389
Casio FX-991EX Classwiz Scientific Calculator - Black
98% of respondents would recommend this to a friend
Item #:
77918389
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What Stands Out
High-Resolution Display
The Casio FX-991EX boasts a 192x63 pixel high-resolution screen, providing clear and concise visibility of mathematical expressions and graphs, enhancing the user’s calculation experience.
Advanced Functions
With over 550 functions including matrix calculations, statistics, and calculus, this calculator caters to students and professionals, tackling complex problems efficiently.
Solar and Battery Power
This model features both solar and battery power sources, ensuring reliability in varied lighting conditions, reducing worries about battery life during critical assessments.
Product Details
| Brand | Casio |
| EAN | 4971850092315, 4549526603327 |
| Model | Casio fx-991EX |
| Power Source | Solar, Battery |
| Key Size | Regular |
| Features | LCD Display, Backlight, Calculus |
| Weight | 198g |
| Colour | Black |
Who Should Buy?
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Students
Perfect for students in high school or college needing a reliable scientific calculator for math and science courses.
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Engineers
Engineers will benefit from the advanced functions and features, aiding in complex calculations during their work.
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Professionals
Ideal for professionals in fields requiring frequent calculations, providing accuracy and convenience in formula management.
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Casual Users
Not ideal for users needing a basic calculator for simple math, as it may be more complex than necessary.
Product Description
Have any Query? Chat with us
Customer Questions & Answers
-
Question:
What materials are used?
Answer: We use high-quality, durable materials for both style and comfort. -
Question:
Are there different color options?
Answer: Yes, our product is available in a range of colors to suit your preference. -
Question:
Is this product suitable for all occasions?
Answer: Yes, it is designed to be versatile and perfect for any occasion.
Editorial Review
The Casio FX-991EX Classwiz Scientific Calculator emerges as an outstanding option for students and professionals alike, impressing users with its extensive features and remarkable value for money. Positioned competitively against more expensive graphical calculators like the fx-cg50, the Classwiz covers all essential scientific calculation needs while maintaining a slim design and a significantly lower price point. Users appreciate its ability to solve complex problems such as polynomial inequalities, and simultaneous equations, as well as its matrix and vector functions, making it suitable for higher-level mathematics. The design elements add to its appeal—the large, high-contrast screen and sleek, metal buttons provide both functionality and a touch of elegance. Moreover, its dual power capability and innovative features like QR code generation for graphical representation of calculations set it apart from competitors. Yet, some have expressed frustrations regarding the responsiveness of the keys, which sometimes require firm pressing and careful checking to ensure inputs are registered correctly. Concerns have also been raised about the quality of the instructional manual, which could be clearer for new users. While the calculator stands out for its comprehensive functionality—offering capabilities for statistical distributions, ratio solving, and more—the learning curve associated with its extensive menu could be daunting for those unfamiliar with scientific calculators. Despite some feedback about the key sensitivity and the manual's readability, the overall impression is that the Casio FX-991EX Classwiz is a reliable and versatile tool ideal for students engaging in secondary school mathematics or professional calculations. ###
Customer Reviews & Ratings
511 customers ratings
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5 Star
87%
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4 Star
7%
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3 Star
1%
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2 Star
0%
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1 Star
2%
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Pros
- Extensive features including polynomial inequalities and matrix capabilities.
- Excellent value for money as a more affordable alternative to high-end graphical calculators.
- Dual-power system (solar and battery).
- QR code function for easy representation of calculations.
- Sleek design with a high-contrast display and metal buttons. ###
Cons
- Instruction manual lacks clarity and is difficult to read.
Platform Trust & Buyer Confidence
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“Great products and very good service: very easy and very fast international delivery.”
9 September 2026 · via Trustpilot
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11 September 2026 · via Trustpilot
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Adele
Verified buyer
“Easy to find and order what you want on the website. Delivery is quick to the UK”
8 September 2026 · via Trustpilot
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