--- product_id: 556369443 title: "CASIO FX-991CW Advanced Scientific Calculator, Black, S" brand: "casio" price: "334.54 DT" currency: TND in_stock: true reviews_count: 10 url: https://www.desertcart.tn/products/556369443-casio-fx-991cw-advanced-scientific-calculator-black-s store_origin: TN region: Tunisia --- # Super fast calculation speed High-res 2.25" LCD display 552 advanced math functions CASIO FX-991CW Advanced Scientific Calculator, Black, S **Brand:** casio **Price:** 334.54 DT **Availability:** ✅ In Stock ## Summary > 📐 Elevate your calculations — because precision is the new power move! ## Quick Answers - **What is this?** CASIO FX-991CW Advanced Scientific Calculator, Black, S by casio - **How much does it cost?** 334.54 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/556369443-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 - • **Crystal-Clear Display:** High-resolution screen shows complex spreadsheets & 4x4 matrices with ease - • **Exam-Ready Reliability:** Trusted by schools for GCSE & A-level exams, built to last through years of study - • **Textbook-Perfect Input:** Natural textbook display mirrors real math symbols for intuitive use - • **Eco-Friendly Solar Power:** Solar-powered with battery backup ensures uninterrupted performance anywhere - • **Power-Packed Performance:** 552 functions including numeric integration, differentiation & polynomial solving ## Overview The CASIO FX-991CW is a solar-powered advanced scientific calculator featuring a 2.25-inch high-resolution LCD that displays complex data like spreadsheets and 4x4 matrices. It supports 552 functions including numeric integration, differentiation, and polynomial solving, making it ideal for middle school to college-level math and exams such as GCSE and A-level. Its natural textbook display ensures symbols appear exactly as in textbooks, enhancing clarity and reducing errors. ## Description A high performance scientific calculator with high resolution display increasing the amount of information displayed and super fast calculation speed for testing or performing the most advance mathematics. High resolution LCD screen allows viewing of more information like spreadsheets and 4x4 matrix calculations. This calculator has a comprehensive set of advanced calculations for integration & differential calculus, along with vector and inequality calculations. For middle school, high school and college math courses. Review: So far so good! - Pricey but works well Review: Calculator for exams, (when you need more than a basic one) - This is the specific version of calculator requested by my childs school for GCSE and A-level , quality good and should last years of studies and exams ## Features - High Resolution Display to view more data like spreadsheets and 4x4 matrix calculations - Natural Text book display - symbols and numbers appear just as they do in textbook - Numeric Integration/Differentiation. 552 functions - Simultaneous and Polynomial Solver - International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0BSJ33C4R | | Best Sellers Rank | 36,807 in Stationery & Office Supplies ( See Top 100 in Stationery & Office Supplies ) 65 in Scientific Calculators | | Brand | Casio | | Brand Name | Casio | | Calculator Type | Engineering/Scientific | | Colour | Black | | Customer Reviews | 4.7 out of 5 stars 2,147 Reviews | | Display Type | LCD | | Enclosure Material | Plastic | | Item Dimensions L x W | 16.2L x 7.7W centimetres | | Item Type Name | Casio Advanced Scientific Calculator | | Item Weight | 3.35 Ounces | | Manufacturer | Casio | | Manufacturer Part Number | FX-991EX | | Model Name | FX-991CW | | Model Number | FX-991CW | | Number of Batteries | 1 LR44 batteries required. (included) | | Number of batteries | 1 LR44 batteries required. (included) | | Power Source | Solar Powered | | Power source | Solar Powered | | Screen Size | 2.25 Inches | | Screen size | 2.25 Inches | | UPC | 889232615011 | | Unit Count | 1.0 count | ## Product Details - **Brand:** Casio - **Calculator Type:** Engineering/Scientific - **Colour:** Black - **Display type:** LCD - **Material:** Plastic - **Model name:** FX-991CW - **Number of batteries:** 1 LR44 batteries required. (included) - **Power source:** Solar Powered - **Product dimensions:** 16.2L x 7.7W centimetres - **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) ![CASIO FX-991CW Advanced Scientific Calculator, Black, S - Image 2](https://m.media-amazon.com/images/I/71cqAki4GuL.jpg) ![CASIO FX-991CW Advanced Scientific Calculator, Black, S - Image 3](https://m.media-amazon.com/images/I/81hAm7XjKcL.jpg) ![CASIO FX-991CW Advanced Scientific Calculator, Black, S - Image 4](https://m.media-amazon.com/images/I/61gxxLY81kL.jpg) ![CASIO FX-991CW Advanced Scientific Calculator, Black, S - Image 5](https://m.media-amazon.com/images/I/81IcKs9I-IL.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 ### ⭐⭐⭐⭐⭐ So far so good! *by F***Y on 14 January 2026* Pricey but works well ### ⭐⭐⭐⭐⭐ Calculator for exams, (when you need more than a basic one) *by S***D on 1 October 2025* This is the specific version of calculator requested by my childs school for GCSE and A-level , quality good and should last years of studies and exams ### ⭐⭐⭐⭐⭐ Great *by S***P on 22 September 2025* It's best for my boys 6th form ## 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/556369443-casio-fx-991cw-advanced-scientific-calculator-black-s](https://www.desertcart.tn/products/556369443-casio-fx-991cw-advanced-scientific-calculator-black-s) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-07-05*