--- product_id: 48260223 title: "Casio FX-991EX Engineering/Scientific Calculator, Black (European Version), 3\" x 6.5\" x 0.4\"" brand: "casio" price: "FREE" currency: GBP in_stock: false url: https://www.desertcart.co.uk/products/48260223-casio-fx-991ex-engineering-scientific-calculator-black-european-version-3 store_origin: GB region: United Kingdom --- # High-res LCD for complex data QR code visualization Dual solar & battery power Casio FX-991EX Engineering/Scientific Calculator, Black (European Version), 3" x 6.5" x 0.4" **Brand:** casio **Price:** FREE **Availability:** ❌ Out of Stock ## Summary > 📐 Elevate your calculations—where precision meets innovation! ## Quick Answers - **What is this?** Casio FX-991EX Engineering/Scientific Calculator, Black (European Version), 3" x 6.5" x 0.4" by casio - **How much does it cost?** FREE with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/48260223-casio-fx-991ex-engineering-scientific-calculator-black-european-version-3) ## Best For - casio enthusiasts ## Why This Product - Trusted casio brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Visualize your math:** Generate QR codes to instantly graph and share your calculations with peers via the Online Visualization Service. - • **Lightweight powerhouse:** Compact 91g design fits effortlessly in your bag, ready for exams, meetings, or on-the-go problem solving. - • **Power that never quits:** Dual solar and battery power ensures uninterrupted performance wherever you crunch numbers. - • **See more, solve faster:** High-resolution LCD displays full expressions and detailed data, eliminating guesswork and boosting accuracy. - • **Master advanced calculus:** Supports integrals, differentials, vectors, inequalities, and distributions—perfect for A-level and beyond. ## Overview The Casio FX-991EX is a cutting-edge scientific calculator featuring 552 functions, a high-resolution LCD, and dual solar/battery power. It supports advanced math including integrals, differentials, vectors, and distributions, and offers QR code generation for instant graphical visualization. Lightweight and durable, it’s the go-to tool for students and professionals aiming to excel in complex calculations. ## Description Scientific calculator features a high-resolution LCD that displays more information at once to help you work through large spreadsheets, matrix calculations and more. Its comprehensive set of advanced calculations means you can work on integration and differential calculus along with vector and inequality calculations. Online Visualization Service allows you to generate a QR code for your problem, and then scan the code to immediately see a graphical representation of your data. Students can then see their collective data in real time with other students. Two-way power utilizes both solar and battery power for reliable operation in any setting. Calculator is perfect for basic math, Calculus, Algebra, Geometry, Probability and Statistics. ## Features - Number of functions: 552 - Power supply: Battery - Calculation of integral, defined integral and differentials - Display technology: LCD ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00ZZ93346 | | Best Sellers Rank | 242,765 in Stationery & Office Supplies ( See Top 100 in Stationery & Office Supplies ) 321 in Scientific Calculators | | Brand Name | Casio | | Calculator Type | Engineering/Scientific | | Colour | Black | | Customer Reviews | 4.7 4.7 out of 5 stars (14,808) | | Display Type | LCD | | Enclosure Material | Plastic | | Item Dimensions L x W | 16.5L x 7.6W centimetres | | Item Type Name | Scientific Calculator | | Item Weight | 91 Grams | | Manufacturer | Casio Computer Co., Ltd | | Manufacturer Part Number | FX-991EX | | Model Name | ClassWiz | | Model Number | FX-991EX | | Number of Batteries | 1 LR44 batteries required. (included) | | Power Source | Battery Powered | | Product Warranty | 1 year limited warranty | | Screen Size | 7.07 Inches | | UPC | 079767032593 809787035195 809394579433 | | Unit Count | 1.0 count | ## Product Details - **Brand:** Casio - **Calculator Type:** Engineering/Scientific - **Colour:** Black - **Display type:** LCD - **Material:** Plastic - **Model name:** ClassWiz - **Number of batteries:** 1 LR44 batteries required. (included) - **Power source:** Battery Powered - **Product dimensions:** 16.5L x 7.6W centimetres - **Screen size:** 7.07 Inches ## Images ![Casio FX-991EX Engineering/Scientific Calculator, Black (European Version), 3" x 6.5" x 0.4" - Image 1](https://m.media-amazon.com/images/I/61r7pV9dztL.jpg) ![Casio FX-991EX Engineering/Scientific Calculator, Black (European Version), 3" x 6.5" x 0.4" - Image 2](https://m.media-amazon.com/images/I/31VcZ3J3k0L.jpg) ![Casio FX-991EX Engineering/Scientific Calculator, Black (European Version), 3" x 6.5" x 0.4" - Image 3](https://m.media-amazon.com/images/I/71mCfR49bYL.jpg) ## Available Options This product comes in different **Pattern** options. ## Questions & Answers **Q: Is it ok to use for 2017 exams?** A: Not only is it OK for 2017 exams it's ESSENTIAL for the new linear A-level maths exams, for students beginning 6th form this September, as exam boards aren't going to hand out statistical tables any more, so calculators like this one are the MINIMUM SPECIFICATION required. In fact, this calculator is specifically mentioned on the MEI website. **Q: Does this come with an English instruction manual?** A: Mine came with most European languages including English, believe the problems may have been teething problems. The manual is downloadable from Casio's website as a pdf. **Q: Is this calculator ok for univeristy exams in economics - the only specification is that the calculator cannot store text** A: It cannot store text **Q: I just bought it and it's only setting is being powered by solar cells, but it only works when i put it in the sun, can I fix this?** A: There is an internal battery as back-up. Just remove small screws fixing the rear case, replace it. If that doesn't solve the problem, you, return the calculator for repair under warranty. --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.uk/products/48260223-casio-fx-991ex-engineering-scientific-calculator-black-european-version-3](https://www.desertcart.co.uk/products/48260223-casio-fx-991ex-engineering-scientific-calculator-black-european-version-3) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-05-21*