--- product_id: 256698007 title: "FX-991ARX Scientific Calculator, Black" brand: "casio" price: "₨20803" currency: LKR in_stock: true reviews_count: 13 category: "Casio" url: https://www.desertcart.lk/products/256698007-fx-991arx-scientific-calculator-black store_origin: LK region: Sri Lanka --- # 4x4 Matrix & Simultaneous Equations QR Code Equation Sharing Dual Battery & Solar Power FX-991ARX Scientific Calculator, Black **Brand:** casio **Price:** ₨20803 **Availability:** ✅ In Stock ## Summary > 📐 Elevate your calculations — where precision meets innovation! ## Quick Answers - **What is this?** FX-991ARX Scientific Calculator, Black by casio - **How much does it cost?** ₨20803 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.lk](https://www.desertcart.lk/products/256698007-fx-991arx-scientific-calculator-black) ## 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 - • **Master complex math with ease:** Supports advanced calculations including quartic equations and 4x4 matrix operations. - • **Seamless digital collaboration:** Generate and scan QR codes to instantly share equations and graphs with your devices. - • **Power that lasts, come rain or shine:** Dual battery and solar power ensure uninterrupted performance wherever you work. - • **Crystal-clear full dot matrix display:** Unabbreviated dual-language screen guarantees accurate reading and error-free input. - • **Compact, lightweight, and built to last:** Sleek black design with durable plastic casing, perfect for on-the-go professionals. ## Overview The Casio FX-991ARX is a cutting-edge scientific calculator featuring a full dot matrix LCD, dual battery and solar power sources, and advanced functions like 4x4 matrix and quartic equation calculations. Its unique QR code generation enables effortless sharing of equations and graphs across devices, making it an essential tool for professionals and students aiming for precision and productivity. ## Description From the manufacturer Simplify your tasks with the Casio Calculator. This Casio calculator has variables and statistical calculation results stored in its memory, and they can be displayed in lists, so there is no need to recall previous models. The unabbreviated dual language display ensures correct reading. This calculator features the calculation functions that allow you to carry out advanced mathematical calculations. Additionally, the online visualization service enables you to generate and scan QR codes of equations for displaying them on from one device to another. Advanced Computing This scientific calculator boasts of unique, new-age calculation functions that support advanced and complicated mathematical calculations. Carrying out operations such as spreadsheet calculations, 4*4 matrix calculations, calculation of simultaneous equations with four unknowns, and quartic equations is smooth. You can generate QR codes of equations on this Casio calculator, using the advanced features. Thus, image projection of the graphs and calculations on your smartphone or tablet becomes hassle-free as you can scan the QR code. New-age Design You can generate QR codes of equations on this Casio calculator, using the advanced features. Thus, image projection of the graphs and calculations on your smartphone or tablet becomes hassle-free as you can scan the QR code. Review: أصلية - الآلة الحاسبه أصلية. شكرا للبائع. Review: أصلية - ممتازة ## Features - Product type: Casio FX-991ARX Scientific Calculator - Screen proportion: Full Dot Matrix - Power source: Battery/Solar Powered ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07N6Q35QN | | Best Sellers Rank | #56 in Office Products ( See Top 100 in Office Products ) #2 in Scientific Calculators | | Brand | Casio | | Calculator Type | Engineering/Scientific | | Color | BLACK | | Colour | BLACK | | Customer Reviews | 4.4 out of 5 stars 506 Reviews | | Display Type | LCD | | Enclosure Material | Plastic | | Item Dimensions L x W | 16.2L x 7.7W centimeters | | Item Weight | 170 Grams | | Manufacturer | Casio | | Mfr Part Number | FX-991ARX | | Model Name | FX-991ARX | | Model Number | FX-991ARX | | Number of Batteries | 1 A batteries required. (included) | | Number of batteries | 1 A batteries required. (included) | | Power Source | Battery | | Power source | Battery | | Screen Size | 2.51 Centimeters | | Screen size | 2.51 Centimeters | | Unit Count | 1 Count | | Warranty Description | 1 year manufacturer warranty | ## Product Details - **Brand:** Casio - **Calculator Type:** Engineering/Scientific - **Colour:** BLACK - **Power source:** Battery - **Screen size:** 2.51 Centimeters ## Images ![FX-991ARX Scientific Calculator, Black - Image 1](https://m.media-amazon.com/images/I/61z9hWHc5yL.jpg) ## Questions & Answers **Q: is it only arabic** A: It is having English and Arabic menu ## Customer Reviews ### ⭐⭐⭐⭐⭐ أصلية *by I***I on 16 November 2025* الآلة الحاسبه أصلية. شكرا للبائع. ### ⭐⭐⭐⭐⭐ أصلية *by O***A on 23 November 2025* ممتازة ### ⭐⭐⭐⭐ Good *by T***D on 1 August 2024* This calculator is good I haven't really used it yet but it's good and has many functions that other calculators don't it just feels a little thin though ## Frequently Bought Together - Casio FX-991ARX Scientific Calculator, Black - TGTGHEE 8 Pieces Math Geometry Kit Set Student Supplies with Shatterproof Storage Box & Reusable Pouch,Includes Rulers,Protractor,Compass,Pencil,Eraser.for Students and Engineering Drawings - UHU STIC, The Proven Glue Stick - Glues strongly, quickly and permanently, without solvent, 8.2g, Set of 3, White pack may vary --- ## 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.lk/products/256698007-fx-991arx-scientific-calculator-black](https://www.desertcart.lk/products/256698007-fx-991arx-scientific-calculator-black) --- *Product available on Desertcart Sri Lanka* *Store origin: LK* *Last updated: 2026-06-24*