--- product_id: 238594604 title: "FX-991ES Plus-2nd Edition Scientific Calculator" brand: "casio" price: "£36.31" currency: GBP in_stock: true reviews_count: 13 category: "Casio" url: https://www.desertcart.co.uk/products/238594604-fx-991es-plus-2nd-edition-scientific-calculator store_origin: GB region: United Kingdom --- # Natural Textbook Display Dual solar & battery power 417 functions powerhouse FX-991ES Plus-2nd Edition Scientific Calculator **Brand:** casio **Price:** £36.31 **Availability:** ✅ In Stock ## Summary > 📊 Elevate your calculations, join the elite of precision and style! ## Quick Answers - **What is this?** FX-991ES Plus-2nd Edition Scientific Calculator by casio - **How much does it cost?** £36.31 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/238594604-fx-991es-plus-2nd-edition-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 - • **Dual Power Source:** Solar & battery combo ensures uninterrupted performance wherever you work. - • **Color-Coded Keypad:** Instantly find the right function with a sleek, intuitive layout designed for speed. - • **Sleek, Portable Design:** Lightweight 95g with a durable slide-on hard case—carry your edge everywhere. - • **Natural Textbook Display:** See formulas exactly as in your textbooks—no more decoding cryptic inputs. - • **Master 417 Functions with Ease:** From calculus to complex numbers, conquer every equation effortlessly. ## Overview The Casio FX-991ES Plus 2nd Edition is a premium scientific calculator featuring 417 functions, a Natural Textbook Display for intuitive input, and a color-coded keypad for quick access. Powered by both solar and battery, it offers reliable performance in a sleek, lightweight design with a protective slide-on hard case—perfect for professionals and students demanding accuracy and efficiency. ## Description 417 functions, Display: Natural Textbook Display, LCD (dot-matrix), 10 + 2 decimal places, Power supply: Solar & Battery, Basic Mathematical Functions, Table Generation, Base-n calculation, Scientific Constants, Vector, Basic Statistics, Differentiation, Non Graphing, Matrix, Equation, Integration, Complex number calculation, Comes with new slide-on hard case, Size (H x W x D): 11.1 x 77.0 x 161.5 mm, Weight: 95g Review: Would purchase again - Nice product, easy to use, helpful calculator. Review: surprisingly nice - UPDATE: I thought the U.S. version of this was the update to this model, the ClassWiz one with menus replacing some of the printed-on functions. That is indeed an update (but maybe to the EX versions rather than, or in addition to, ES versions? Because EX versions are discontinued). But actually the U.S. version of the 991ES is the Fx-115ES. I had thought that because of its lower number, it was just a lower-grade model. But in fact it is essentially the same as the 991ES with a few more capabilities and white instead of black. I like this calculator a lot so I wanted a "spare" plus it is nice to always have one of the two within easy reach, so I got the U.S. version as well. They are both similar high quality, just different colors. I am very pleased with these calculators. Previous review: I've used RPN HP calculators for years and didn't expect to enjoy or appreciate this non-RPN calculator as much as I do. The main reason I got it was that I found a couple of lovely calculator apps for Android that I figured out were supposed to mimic the 911 series Casio, and so I wanted the real thing. It has been easy and intuitive to figure out how to use. As someone else commented, this seems to be for Indian market so you probably won't have US warranty. But the US version is totally different; you have to access many of the functions through menus and they are not printed on/above the keys. But having them printed instead of having to access through menus is much more efficient once you learn where things are. The US menu version is maybe best for people who want to use the calculator briefly and/or don't want to bother learning it (like people used to a different brand). You might have to go to a non-US Casio site to find the pdf manual for the 991ES. It would have been nice to include a hard copy of the manual but these days that's rare, and I'm fine with this because it keeps prices down. US version is now ClassWiz which sadly replaced the 991 ES and 911 EX. So you have no choice but to get a non-US-market one if you want the ES or EX (but desertcart also sells a copy-cat version of the 911ES/EX from a different brand). As far as the hardware: The calculator has a nice look and feel. The plastic is premium and nice. The upper (smaller) keys feel nicer to me, especially as a (classic) HP user. The bottom (bigger) keys are a bit squishy but that's normal for most calculators. I like that there are no soft rubber keys or other soft parts (because soft plastics often get old and sticky and gross). The case goes on and off smoothly and does not scratch the calculator. I am glad I got this calculator and I'm sad that Casio is switching to a simplified look, menu-driven, version at least for the U.S. market. ## Features - Redesigned ES PLUS series calculators featuring easy-to-understand Natural Textbook Display, Non-Programmable Scientific Calculator with 417 Functions - Stylish design but same function as Casio FX-991ESPLUS 1st edition, 10-digit mantissa + 2-digit exponential display - Basic Trigonometrical & Statistics Functions, and many more functions - Colour coded keypad for easy key differentiation, Simple and easy to use, Comes with new slide on hard case ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0846D5CBP | | Best Sellers Rank | #23,520 in Office Products ( See Top 100 in Office Products ) #23 in Scientific Calculators | | Brand | Casio | | Calculator Type | Engineering/Scientific, Graphing | | Color | Black | | Customer Reviews | 4.7 out of 5 stars 14,617 Reviews | | Display Type | LCD | | Enclosure Material | Metal or Durable Plastic | | Global Trade Identification Number | 04549526608773 | | Item Dimensions L x W | 6.38"L x 3.03"W | | Item Weight | 95 Grams | | Manufacturer | CASIO | | Mfr Part Number | C79 | | Model Name | fx-991ES PLUS 2nd edition | | Model Number | FX-991ES PLUS 2ND EDITION | | Number of Batteries | 1 LR44 batteries required. (included) | | Power Source | Battery Powered | | Screen Size | 4 Inches | ## Product Details - **Brand:** Casio - **Calculator Type:** Engineering/Scientific, Graphing - **Color:** Black - **Power Source:** Battery Powered - **Screen Size:** 4 Inches ## Images ![FX-991ES Plus-2nd Edition Scientific Calculator - Image 1](https://m.media-amazon.com/images/I/61IujYL0JTL.jpg) ![FX-991ES Plus-2nd Edition Scientific Calculator - Image 2](https://m.media-amazon.com/images/I/619f7cza-ML.jpg) ![FX-991ES Plus-2nd Edition Scientific Calculator - Image 3](https://m.media-amazon.com/images/I/61AGTCz8fjL.jpg) ![FX-991ES Plus-2nd Edition Scientific Calculator - Image 4](https://m.media-amazon.com/images/I/71IKQKEHTvL.jpg) ![FX-991ES Plus-2nd Edition Scientific Calculator - Image 5](https://m.media-amazon.com/images/I/81hUA9xKNuL.jpg) ## Questions & Answers **Q: Can this do mm to inch** A: yes **Q: Cual es la razon para invertir 35 dolares en tu fx-991es, si la calculadora fx-991ex vale apenas 20 dolares y tiene 135 funciones mas ?** A: Me gustó más su diseño, la utilizo como calculadora de bolsillo no programable únicamente , (utilizo una programable para ingeniería). el precio estaba en oferta cuando la compré, me costó casi lo mismo y me gustó más. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Would purchase again *by A***E on March 11, 2026* Nice product, easy to use, helpful calculator. ### ⭐⭐⭐⭐⭐ surprisingly nice *by S***9 on March 15, 2024* UPDATE: I thought the U.S. version of this was the update to this model, the ClassWiz one with menus replacing some of the printed-on functions. That is indeed an update (but maybe to the EX versions rather than, or in addition to, ES versions? Because EX versions are discontinued). But actually the U.S. version of the 991ES is the Fx-115ES. I had thought that because of its lower number, it was just a lower-grade model. But in fact it is essentially the same as the 991ES with a few more capabilities and white instead of black. I like this calculator a lot so I wanted a "spare" plus it is nice to always have one of the two within easy reach, so I got the U.S. version as well. They are both similar high quality, just different colors. I am very pleased with these calculators. Previous review: I've used RPN HP calculators for years and didn't expect to enjoy or appreciate this non-RPN calculator as much as I do. The main reason I got it was that I found a couple of lovely calculator apps for Android that I figured out were supposed to mimic the 911 series Casio, and so I wanted the real thing. It has been easy and intuitive to figure out how to use. As someone else commented, this seems to be for Indian market so you probably won't have US warranty. But the US version is totally different; you have to access many of the functions through menus and they are not printed on/above the keys. But having them printed instead of having to access through menus is much more efficient once you learn where things are. The US menu version is maybe best for people who want to use the calculator briefly and/or don't want to bother learning it (like people used to a different brand). You might have to go to a non-US Casio site to find the pdf manual for the 991ES. It would have been nice to include a hard copy of the manual but these days that's rare, and I'm fine with this because it keeps prices down. US version is now ClassWiz which sadly replaced the 991 ES and 911 EX. So you have no choice but to get a non-US-market one if you want the ES or EX (but Amazon also sells a copy-cat version of the 911ES/EX from a different brand). As far as the hardware: The calculator has a nice look and feel. The plastic is premium and nice. The upper (smaller) keys feel nicer to me, especially as a (classic) HP user. The bottom (bigger) keys are a bit squishy but that's normal for most calculators. I like that there are no soft rubber keys or other soft parts (because soft plastics often get old and sticky and gross). The case goes on and off smoothly and does not scratch the calculator. I am glad I got this calculator and I'm sad that Casio is switching to a simplified look, menu-driven, version at least for the U.S. market. ### ⭐⭐⭐⭐⭐ Good for College Students *by C***A on April 5, 2026* My daughter who is studying to be a mathematics teacher says this calculator is the BOSS. she says it works out fractions and is really good for people who are doing advanced mathematics. She loves it and I'm glad I bought it for her. ## Frequently Bought Together - Casio FX-991ES Plus-2nd Edition Scientific Calculator - Casio fx-115ES Plus 2nd Edition – Advanced Scientific Calculator | 280+ Functions, Natural Textbook Display℠ | Ideal for Math, Science, Engineering & Statistics - 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.co.uk/products/238594604-fx-991es-plus-2nd-edition-scientific-calculator](https://www.desertcart.co.uk/products/238594604-fx-991es-plus-2nd-edition-scientific-calculator) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-05-15*