--- product_id: 516361960 title: "fx-991CW Advanced Scientific Calculator (UK Version)" brand: "casio" price: "₨21865" currency: LKR in_stock: true reviews_count: 13 url: https://www.desertcart.lk/products/516361960-fx-991cw-advanced-scientific-calculator-uk-version store_origin: LK region: Sri Lanka --- # 540+ advanced functions Natural Textbook Display Dual solar & battery power fx-991CW Advanced Scientific Calculator (UK Version) **Brand:** casio **Price:** ₨21865 **Availability:** ✅ In Stock ## Summary > 📐 Master every equation with the UK’s top advanced scientific calculator! ## Quick Answers - **What is this?** fx-991CW Advanced Scientific Calculator (UK Version) by casio - **How much does it cost?** ₨21865 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/516361960-fx-991cw-advanced-scientific-calculator-uk-version) ## 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 - • **Built to Last:** Compact, durable design with clip-on hard cover and backed by a 3-year guarantee for peace of mind. - • **Effortless Clarity:** Natural Textbook Display shows formulas exactly as in your textbooks for instant comprehension. - • **Smart & Sustainable:** Dual solar and battery power with auto power-off means it’s always ready when you are. - • **Endless Functionality:** Over 540 mathematical functions including equation solvers, statistics, and vector calculations. - • **Exam-Ready Powerhouse:** Approved for all UK exams from Key Stage 3 to Highers—never worry about compliance again. ## Overview The Casio fx-991CW is the UK’s best-selling advanced scientific calculator, featuring a high-definition Natural Textbook Display and over 540 functions. Dual powered by solar and battery, it’s approved for all UK exams from Key Stage 3 through Highers, making it the essential tool for GCSE, A/AS level, and university students. Its intuitive interface, durable design, and comprehensive functionality ensure reliable performance throughout your academic journey. ## Description From the manufacturer Casio fx-991CW Advanced Scientific Calculator The Casio fx-991 CW is the new upgraded version of the Casio fx-991 EX (Casio’s most advanced scientific calculator), containing additional features, to include a high definition display and improved menu navigation. Approved for Key stages 3, 4 and 5, recommended for Advanced GCSE, A/AS level and Highers. Allowed in every UK exam where a calculator can be used. The Casio fx-991 CW is Casio’s most advanced scientific calculator with 540 + mathematical functions. The large Natural Textbook Display shows mathematical expressions like roots and fractions as they appear in your textbooks which increases comprehension because results are easier to understand. Key Features Casio fx-991 is the UK’s best-selling ‘advanced scientific’ calculator. FX-991 CW is the new upgraded version of the fx-991 EX Allowed in every UK exam where a calculator can be used Approved for Key stages 3, 4 and 5, recommended for Advanced GCSE, A/AS level and Highers Dual powered, solar with battery back up and auto power-off. Clip-on on protective hard cover included 3 year guarantee Large and clear high definition Natural Textbook Display shows mathematical expressions as they appear in textbooks New intuitive key layout and menus, quick and easy to navigate to access more functionality Casio fx-991 CW Casio’s most advanced scientific calculator with 540 + mathematical functions Scientific and Statistics Display type: 62 * 192 FULL DOT Natural display, Functions: 540+ Algebraic input logic: Natural V.P.A.M. Number of characters/lines: 16/1+10/1 Icon menu Significant digits and exponent: 10+2 Variable memory: 9 Repeat function Basic mathematics Fraction calculations Functions and Features Powers, roots, reciprocal, logarithms (any base) Equivalent ratio solver, Table of values Equation solver (polynomial, simultaneous linear, numeric) Polynomial inequality solver Angle dimensions DEG,RAD,GRAD Conversions between >DEG-RAD-GRAD Trigonometric functions sin/cos/tan/sin-1/cos-1/tan-1 Calculations in the sexagesimal system (hours (or degrees)/minutes/seconds) Probability distributions (Normal, Binomial, Poisson) More Functions and Features Random decimal and integer generator Vector and matrix arithmetic Spreadsheet, Complex numbers Coordinate conversion PolarRectangular Hyperbolic functions sinh/cosh/tanh/sinh-1/cosh-1/tanh-1, Technical notation ENG Calculation with technical symbols Scientific constants: 47,Unit conversions: 40 Base-N (hexadecimal/decimal/binary/octal) Logical operators (AND/OR/etc.) Other models to consider If you require an even more powerful and more advanced calculator, the Casio Graphic calculator range provides dynamic graphing; capable of calculating and displaying graphs, charts, spreadsheets and statistics. The Casio Graphic range includes the new fx-CG100 and fx-CG50. Review: Gold standard for calculators - High quality calculator, can handle months of being dropped in bags. Great amount of functions and very versatile, suitable for A levels and even got me through most of university. Easy to use, quite quick, perfect size for fitting in a school bag. Review: Excellent, reliable calculator - Excellent calculator for A Level Maths/uni science degrees. Inadequate for Further Maths A Level (and probably uni Maths therefore!), though, I believe. ## Features - Casio fx-991 is the UK’s best-selling ‘advanced scientific’ calculator. - fx-991 CW is the new upgraded version of the fx-991 EX - Allowed in every UK exam where a calculator can be used - Approved for Key stages 3, 4 and 5, recommended for Advanced GCSE, A/AS level and Highers - Dual powered, solar with battery back up and auto power-off - Ideal exam calculator for: GCSE Higher SQA Higher ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0BVVZYNQH | | Best Sellers Rank | 1,475 in Stationery & Office Supplies ( See Top 100 in Stationery & Office Supplies ) 7 in Scientific Calculators | | Brand | Casio | | Brand Name | Casio | | Calculator Type | Graphing | | Colour | black | | Customer Reviews | 4.7 out of 5 stars 2,584 Reviews | | Display Type | LCD | | Enclosure Material | Plastic | | Item Dimensions L x W | 16.2L x 7.7W centimetres | | Item Weight | 100 Grams | | Manufacturer | Casio | | Manufacturer Contact Information | Casio Computer Co., Ltd. | | Manufacturer Part Number | FX-991CW-W-UT | | Model Name | Casio FX-991CW Advanced Scientific Calculator (UK Version) | | Model Number | FX-991CW-W-UT | | Number of Batteries | 1 LR44 batteries required. | | Number of batteries | 1 LR44 batteries required. | | Power Source | Solar Powered | | Power source | Solar Powered | | Product Warranty | 3 year guarantee | | Screen Size | 2.5 Inches | | Screen size | 2.5 Inches | | Unit Count | 1.0 count | ## Product Details - **Brand:** Casio - **Calculator Type:** Graphing - **Colour:** black - **Display type:** LCD - **Material:** Plastic - **Model name:** Casio FX-991CW Advanced Scientific Calculator (UK Version) - **Number of batteries:** 1 LR44 batteries required. - **Power source:** Solar Powered - **Product dimensions:** 16.2L x 7.7W centimetres - **Screen size:** 2.5 Inches ## Images ![fx-991CW Advanced Scientific Calculator (UK Version) - Image 1](https://m.media-amazon.com/images/I/714Av0FqCnL.jpg) ![fx-991CW Advanced Scientific Calculator (UK Version) - Image 2](https://m.media-amazon.com/images/I/81zAIzQxi9L.jpg) ![fx-991CW Advanced Scientific Calculator (UK Version) - Image 3](https://m.media-amazon.com/images/I/61jbT3zn4NL.jpg) ![fx-991CW Advanced Scientific Calculator (UK Version) - Image 4](https://m.media-amazon.com/images/I/61Sge1ebX6L.jpg) ![fx-991CW Advanced Scientific Calculator (UK Version) - Image 5](https://m.media-amazon.com/images/I/61QNJoHkciL.jpg) ## Available Options This product comes in different **Style** options. ## Questions & Answers **Q: Is this suitable for university level** A: It depends. I know from experience that Open University maths exams do not allow calculators that can evaluate integrals so, in that case, this would not be allowed. I would ask the faculty what calculators are permissible in exams as this might also depend on the module, as well as the institution. **Q: Does this calculator have a linear regression function?** A: Yes. A quick search on youtube for LG produced results. Good luck! **Q: Does this have CAS?** A: No this calculator does not have CAS. CAS stands for "Computer Algebra System", which means that calculators with this do symbolic algebra. This is why CAS calculators are banned in most exams. **Q: Does it have graphical computing capabilities? I need to take a math test, the calculator is not allowed to graph calculation function.** A: No but it will work out tables of values for you. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Gold standard for calculators *by J***H on 11 July 2026* High quality calculator, can handle months of being dropped in bags. Great amount of functions and very versatile, suitable for A levels and even got me through most of university. Easy to use, quite quick, perfect size for fitting in a school bag. ### ⭐⭐⭐⭐⭐ Excellent, reliable calculator *by E***Y on 11 July 2026* Excellent calculator for A Level Maths/uni science degrees. Inadequate for Further Maths A Level (and probably uni Maths therefore!), though, I believe. ### ⭐⭐⭐⭐⭐ Genuine calculator *by A***H on 7 June 2026* Really good price, the best recommended calculator for gcse and A level students. ## Frequently Bought Together - Casio fx-991CW Advanced Scientific Calculator (UK Version) - Helix Oxford Maths Set with Storage Tin - 10 Piece Maths Equipment Set - Zamasha Clear Pencil Case Black | 22x4x9 cm Stylish, Practical and Transparent Pencil Case | Versatile Storage for Stationery, Toiletries, Makeup, Travel & Office Supplies --- ## 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/516361960-fx-991cw-advanced-scientific-calculator-uk-version](https://www.desertcart.lk/products/516361960-fx-991cw-advanced-scientific-calculator-uk-version) --- *Product available on Desertcart Sri Lanka* *Store origin: LK* *Last updated: 2026-07-22*