--- product_id: 727662253 title: "CASIO FX-991CW Advanced Scientific Calculator, Black, S" brand: "casio" price: "387.74 DT" currency: TND in_stock: true reviews_count: 10 category: "Casio" url: https://www.desertcart.tn/products/727662253-casio-fx-991cw-advanced-scientific-calculator-black-s store_origin: TN region: Tunisia --- # 540 advanced functions High-def 4-tone display Solar powered + battery backup CASIO FX-991CW Advanced Scientific Calculator, Black, S **Brand:** casio **Price:** 387.74 DT **Availability:** ✅ In Stock ## Summary > 📐 Elevate your calculations—where precision meets next-gen tech. ## Quick Answers - **What is this?** CASIO FX-991CW Advanced Scientific Calculator, Black, S by casio - **How much does it cost?** 387.74 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/727662253-casio-fx-991cw-advanced-scientific-calculator-black-s) ## 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 - • **QR Code Graphing:** Instantly scan and visualize graphs on ClassPad.net—tech that keeps you ahead. - • **Durable & Ergonomic:** Rounded keys and anti-slip case built for long study sessions and exams. - • **Memory & Math Catalog:** Store and recall up to 9 variables plus 47 constants for seamless workflow. - • **540 Advanced Functions:** From integrals to 4x4 matrix ops—power through complex calculations effortlessly. - • **Natural Textbook Display:** See equations exactly as in your textbooks for error-free learning. ## Overview The CASIO FX-991CW is a solar-powered advanced scientific calculator featuring a high-definition 4-tone LCD display and natural textbook view. It supports 540 advanced mathematical functions including integrals, matrix operations, and spreadsheet-style data display. With memory storage for variables and constants, QR code graphing integration, and a durable ergonomic design, it’s engineered for students and professionals demanding accuracy and efficiency. ## Description High performance scientific calculator with high-resolution display features ultra-fast calculating speeds to increase the amount of displayed information and test and perform the most advanced math. High resolution LCD screen displays detailed information such as spreadsheet and 4x4 matrix calculations. This calculator has a comprehensive set of advanced calculations for integral and fractional calculations, along with vector and irregularity calculations. For middle school, high school, college math courses Review: Casio - Casio managed to update a classic without ruining it. The FX-991CW takes the reliable computational power of its predecessor and wraps it in a smooth, accessible, and high-tech shell. Absolutely highly recommended. Review: いいよ ## Features - NATURAL TEXTBOOK DISPLAY - Shows equations, fractions and symbols as shown in the textbook to help deepen understanding and reduce errors - HIGH DEFINITION 4 TONE DISPLAY - Enhanced screen with quad-tone shading provides increased visibility and helps you keep track of your cursor while writing or editing expressions - Memory & Math Catalog - Store and recall up to 9 variables including integuments, calculations, and functions. A feature educators demand for memory during sessions. Access to 47 constants, 40 conversions and advanced mathematical functions through the intuitive math catalog - 540 Advanced Features - Perform numerical integral and fractions, 4x4 matrix operations, spreadsheet style data display and more - QR FEATURES & DURABLE DESIGN - Scan QR code and graphing results with ClassPad.net. Includes rounded keys and anti-slip hard case for classroom and examination ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0BSJ33C4R | | Amazon Bestseller | #77,323 in Office Products ( See Top 100 in Office Products ) #41 in Scientific Calculators | | Brand | Casio | | Calculator Type | Engineering/Scientific | | Color | Black | | Customer Reviews | 4.7 4.7 out of 5 stars (2,089) | | Display Type | LCD | | Enclosure Material | Plastic | | Item Dimensions L x W | 16L x 7.6W cm | | Item Type Name | Casio Advanced Scientific Calculator | | Item Weight | 3.35 Ounces | | Manufacturer | Casio | | Mfr Part Number | FX-991EX | | Model Name | FX-991CW | | Model Number | FX-991CW | | Number of Batteries | 1 LR44 batteries required. (included) | | Power Source | Solar Powered | | Screen Size | 2.25 Inches | | UPC | 889232615011 | | Unit Count | 1.0 Count | ## Product Details - **Brand:** Casio - **Calculator Type:** Engineering/Scientific - **Color:** Black - **Power Source:** Solar Powered - **Screen Size:** 2.25 Inches ## Images ![CASIO FX-991CW Advanced Scientific Calculator, Black, S - Image 1](https://m.media-amazon.com/images/I/716Qoq3t58L.jpg) ## Questions & Answers **Q: Can it handle complex numbers in matrix ?** A: Yes. .or say within reason. Download the manual from Casio, its free and you dont need to buy calculator.. Look at page 114 and 107. Make sure you download fx-991CW...not fx-991. **Q: ¿Este artículo tiene garantía?** A: Good afternoon, I bought the calculators without a guarantee, but I really don't know if the product has a guarantee, although they should have a guarantee. Regards, AC. **Q: when you turn off the calculator, the calculation history is deleted or not?** A: The data is deleted when you turn it off. It's the only thing that keeps it from being the perfect scientific calculator for me. **Q: is there a ohms law calculator?** A: Well any calculator can "do" Ohms law. If ypur worried about remembering it, any programming calculator can store formulas for you...Calculated Industries (yellow calculators) makes 2 Electrical calculators, pretty sure both have Ohms law function key. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Casio *by A***O on October 8, 2025* Casio managed to update a classic without ruining it. The FX-991CW takes the reliable computational power of its predecessor and wraps it in a smooth, accessible, and high-tech shell. Absolutely highly recommended. ### ⭐⭐⭐⭐⭐ Review *by A***ー on November 19, 2025* いいよ ### ⭐⭐⭐⭐ Review *by カ***ー on March 20, 2026* 液晶に濃度変化が付いて見やすく進化。キーの文字数が減ってスッキリしましたが、カタログキーがパソコンで言うフォルダに当たるキーにまとめられていて、液晶画面の大きな画面で選択できます。ただ何度も目的の物を探すのにボタンをポチポチしなければなりません。一長一短あり ## Frequently Bought Together - Casio fx-991CW– Advanced Scientific Calculator with High-Res 4-Tone Display | Natural Textbook Display | 540+ Functions, Numeric Calculus, Matrix Solver | Ideal for Engineering, Science & Exams - Texas Instruments TI-36X Pro Engineering/Scientific Calculator | 9.7 Inch | Black. --- ## 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.tn/products/727662253-casio-fx-991cw-advanced-scientific-calculator-black-s](https://www.desertcart.tn/products/727662253-casio-fx-991cw-advanced-scientific-calculator-black-s) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-05-29*