--- product_id: 523514828 title: "FX-991CW Advanced Scientific Calculator" brand: "casio" price: "€ 47.42" currency: EUR in_stock: true reviews_count: 12 category: "Casio" url: https://www.desertcart.pt/products/523514828-fx-991cw-advanced-scientific-calculator store_origin: PT region: Portugal --- # High-res 2.25" LCD display 552 advanced math functions Solar powered with battery backup FX-991CW Advanced Scientific Calculator **Brand:** casio **Price:** € 47.42 **Availability:** ✅ In Stock ## Summary > 📐 Elevate your math game with precision and style! ## Quick Answers - **What is this?** FX-991CW Advanced Scientific Calculator by casio - **How much does it cost?** € 47.42 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/523514828-fx-991cw-advanced-scientific-calculator) ## 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 - • **Eco-Friendly Power:** Solar powered with battery backup means uninterrupted performance wherever you go. - • **Trusted by Thousands:** 4.7-star rating from over 2,100 users proves it’s the go-to for students & pros alike. - • **See More, Solve Faster:** High-resolution display lets you view complex spreadsheets & 4x4 matrices with ease. - • **Textbook-Perfect Input:** Natural textbook display shows formulas exactly as in your study materials—no guesswork. - • **Master Calculus & Beyond:** Perform numeric integration, differentiation, vector, and inequality calculations effortlessly. ## 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 vector calculations, making it ideal for middle school through college math courses. With a natural textbook display and a 4.7-star rating from over 2,100 users, it combines reliability, precision, and eco-friendly power in a sleek, portable design. ## 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: Best calculator <3 - Best calculator i ever used it does need time to learn but honestly didn’t deter me from loving it Review: Good one - Good item... For starting high school ## 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 ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0BSJ33C4R | | Best Sellers Rank | #828 in Office Products ( See Top 100 in Office Products ) #10 in Scientific Calculators | | Brand | Casio | | Calculator Type | Engineering/Scientific | | Color | Black | | Colour | Black | | Customer Reviews | 4.7 out of 5 stars 2,134 Reviews | | Display Type | LCD | | Enclosure Material | Plastic | | Item Dimensions L x W | 7.7L x 16.2W centimeters | | 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) | | 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 Count | | Warranty Description | 1 YEAR | ## Product Details - **Brand:** Casio - **Calculator Type:** Engineering/Scientific - **Colour:** Black - **Power source:** Solar Powered - **Screen size:** 2.25 Inches ## Images ![FX-991CW Advanced Scientific Calculator - 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 ### ⭐⭐⭐⭐⭐ Best calculator <3 *by R***A on 23 November 2025* Best calculator i ever used it does need time to learn but honestly didn’t deter me from loving it ### ⭐⭐⭐⭐⭐ Good one *by T***A on 31 October 2025* Good item... For starting high school ### ⭐⭐⭐⭐ Ok *by E***A on 22 November 2025* Ok ## 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.pt/products/523514828-fx-991cw-advanced-scientific-calculator](https://www.desertcart.pt/products/523514828-fx-991cw-advanced-scientific-calculator) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-06-22*