---
product_id: 48591129
title: "CASIO FX-991EX Advanced Engineering/Scientific Calculator (UK VERSION), Black"
brand: "casio"
price: "0 zł"
currency: PLN
in_stock: false
reviews_count: 13
url: https://www.desertcart.pl/products/48591129-casio-fx-991ex-advanced-engineering-scientific-calculator-uk-version-black
store_origin: PL
region: Poland
---

# QR code generator for app integration 552 functions for every calculation Solar powered with battery backup CASIO FX-991EX Advanced Engineering/Scientific Calculator (UK VERSION), Black

**Brand:** casio
**Price:** 0 zł
**Availability:** ❌ Out of Stock

## Summary

> 🔬 Elevate your calculations — the pro’s choice for precision and power!

## Quick Answers

- **What is this?** CASIO FX-991EX Advanced Engineering/Scientific Calculator (UK VERSION), Black by casio
- **How much does it cost?** 0 zł with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/48591129-casio-fx-991ex-advanced-engineering-scientific-calculator-uk-version-black)

## 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 seamless LR44 battery backup ensures uninterrupted performance anywhere.
- • **Precision Meets Speed:** High-resolution display and lightning-fast processing for flawless, efficient workflows.
- • **Durable & Sleek Design:** Lightweight carbon-fiber effect body built to last, combining style with professional reliability.
- • **Instant Visual Insights:** Built-in QR code creator links your calculations to dynamic graphs via the Casio app.
- • **Master Complex Calculations:** 552 advanced mathematical functions tailored for GCSE, A-level, and professional use.

## Overview

The CASIO FX-991EX is the UK’s best-selling advanced scientific calculator, featuring 552 mathematical functions, solar power with battery backup, and a high-resolution display. Designed for advanced GCSE, A-level, and professional engineering use, it includes a unique QR code generator for seamless app integration, all housed in a durable, lightweight body that balances style with long-lasting reliability.

## Description

From the manufacturer Casio fx-991EX Advanced Scientific Calculator The Casio fx-991EX is Casio’s most advanced scientific calculator with 552 mathematical functions. 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 large Natural Textbook Display (Natural-V.P.A.M.) shows mathematical expressions like roots and fractions as they appear in your textbooks which increases comprehension because results are easier to understand. The UK’s best-selling Advanced Scientific calculator. Main Features and Functions Especially recommended for Advanced GCSE, A/AS level and Highers. Large and clear Natural Textbook Display (Natural-V.P.A.M.), shows mathematical expressions as they appear in textbooks 552 Mathematical functions Solar Powered with Battery backup Slide-on protective hard cover included Equation, Matrix, Vector, Inequality, Probability and Complex Number Calculations QR Code function BaseN function Protective Case Battery powered (LR44 x 1 supplied) 274 Functions Auto power off Hard slip on case included Large Natural Textbook Display (Natural-V.P.A.M.), shows mathematical expressions as they appear in textbooks 192 x 63 LCD display, 82mm (W) x 168mm (L) x 18mm (H) (excl. cover) Weight 90g Why a Casio Scientific/Graphic calculator? Casio have pioneered the development of mathematical tools for over 50 years and have always provided devices embedded with ease of use, advanced features and progressive learning functionality. The Casio range of Scientific and Graphic calculators enhance mathematics study along with a broad range of associated subjects and assessments. The Casio educational calculator range provides a series of features and devices which will continue to develop student understanding, interpretation and fundamental knowledge of the subject area.

Review: The best scientific calculator I’ve ever used - The best calculator I’ve ever had. Truly professional and very reliable. It’s fast, accurate, and very easy to use. The display is clear and well designed, which makes calculations much easier, especially for complex equations. The functions available are perfect for engineering and scientific work. The build quality is excellent, and it feels solid and durable. In my opinion, it offers great value for money and is suitable for students as well as professionals. Highly recommended!
Review: The ultimate scientific calculator – outstanding - Outside of a graphing calculator, which is a much more expensive and complex proposition, this has to be the best you can get. Casio has spent years refining the way these things work, and it shows. The keyboard, for instance, is faultless. The display, considering it's not backlit, is very clear, and higher resolution than in previous models so you can have more rows in a table or spreadsheet. It's a very fast calculator too, with most operations happening instantly. Mostly it works on solar power, and there's a little 'sun' icon to tell you this is happening. If the light's too dim, the LR44 backup battery will take over, and since this is just about the most widely available button cell battery, you should be able to replace it easily and for peanuts. The range of functions on offer is amazing – almost too much until you get your head around them. Might be worth watching some YouTube videos for this. There are quite a few on this calculator and others that work like it does. One cool feature is the 'QR code' creator that puts a QR code on the screen you can scan with your phone to get graphical representations of functions through the Casio app that you would be able to put into projects. Nice. If you're tempted to get a cheaper brand to save a couple of quid, don't bother. This is such a low price you may as well have the best. You won't get the great keyboard with a cheaper brand, or the speed, or the cool carbon-fibre effect body. Casios are always well built and last forever. This one weighs nothing but feels good and well built although the hard case it fits into is a little bit rattly and being white will show dirt. My only other criticisms are that some of the text on the keyboard is a bit too small to read comfortably, especially on the textured surface, and the same thing applies to some of the text on the screen too, like the list of scientific constants. And this comes in a blister pack that you have to destroy to open instead of a simple box you can keep. Small beer. Really, this is about as good as it gets. It's outstanding. Just get one.

## Features

- The UK’s best-selling advanced Scientific calculator.
- Especially recommended for advanced GCSE, a/as level and higher.
- This model has now been replaced with the new upgraded FX-991 packed with addtional features
- 552 Mathematical functions
- Solar powered with battery backup

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0719FWP3X |
| Best Sellers Rank | 20,798 in Stationery & Office Supplies ( See Top 100 in Stationery & Office Supplies ) 57 in Scientific Calculators |
| Brand | Casio |
| Brand Name | Casio |
| Calculator Type | Engineering/Scientific |
| Colour | Black |
| Customer Reviews | 4.7 out of 5 stars 9,514 Reviews |
| Display Type | Natural Textbook Display |
| Enclosure Material | Plastic |
| Global Trade Identification Number | 04549526603327 |
| Item Dimensions L x W | 16.8L x 8.2W centimetres |
| Item Part Number | FX-991EX |
| Item Type Name | ADVANCED SCIENTIFIC CALCULATOR (UK VERSION) |
| Item Weight | 3.18 Ounces |
| Manufacturer | CASIO |
| Manufacturer Part Number | FX-991EX |
| Model Name | FX-991EX |
| Model Number | FX-991EX |
| Model name | FX-991EX |
| Number of Batteries | 1 CR123A batteries required. (included) |
| Number of batteries | 1 CR123A batteries required. (included) |
| Power Source | Solar & Battery Powered (LR54) |
| Power source | Solar & Battery Powered (LR54) |
| Product Warranty | 3 Year |

## Product Details

- **Brand:** Casio
- **Calculator Type:** Engineering/Scientific
- **Colour:** Black
- **Display type:** Natural Textbook Display
- **Global Trade Identification Number:** 04549526603327
- **Material:** Plastic
- **Model name:** FX-991EX
- **Number of batteries:** 1 CR123A batteries required. (included)
- **Power source:** Solar & Battery Powered (LR54)
- **Product dimensions:** 16.8L x 8.2W centimetres

## Images

![CASIO FX-991EX Advanced Engineering/Scientific Calculator (UK VERSION), Black - Image 1](https://m.media-amazon.com/images/I/71wygIjTn6L.jpg)
![CASIO FX-991EX Advanced Engineering/Scientific Calculator (UK VERSION), Black - Image 2](https://m.media-amazon.com/images/I/61DwjPr90aL.jpg)
![CASIO FX-991EX Advanced Engineering/Scientific Calculator (UK VERSION), Black - Image 3](https://m.media-amazon.com/images/I/81vZ5yRGdwL.jpg)
![CASIO FX-991EX Advanced Engineering/Scientific Calculator (UK VERSION), Black - Image 4](https://m.media-amazon.com/images/I/819FZlTX6ZL.jpg)
![CASIO FX-991EX Advanced Engineering/Scientific Calculator (UK VERSION), Black - Image 5](https://m.media-amazon.com/images/I/71icOjAJXLL.jpg)

## 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 Standard Deviation?**
A: Yes it does.

## Customer Reviews

### ⭐⭐⭐⭐⭐ The best scientific calculator I’ve ever used
*by F***N on 16 February 2026*

The best calculator I’ve ever had. Truly professional and very reliable. It’s fast, accurate, and very easy to use. The display is clear and well designed, which makes calculations much easier, especially for complex equations. The functions available are perfect for engineering and scientific work. The build quality is excellent, and it feels solid and durable. In my opinion, it offers great value for money and is suitable for students as well as professionals. Highly recommended!

### ⭐⭐⭐⭐⭐ The ultimate scientific calculator – outstanding
*by A***O on 10 August 2020*

Outside of a graphing calculator, which is a much more expensive and complex proposition, this has to be the best you can get. Casio has spent years refining the way these things work, and it shows. The keyboard, for instance, is faultless. The display, considering it's not backlit, is very clear, and higher resolution than in previous models so you can have more rows in a table or spreadsheet. It's a very fast calculator too, with most operations happening instantly. Mostly it works on solar power, and there's a little 'sun' icon to tell you this is happening. If the light's too dim, the LR44 backup battery will take over, and since this is just about the most widely available button cell battery, you should be able to replace it easily and for peanuts. The range of functions on offer is amazing – almost too much until you get your head around them. Might be worth watching some YouTube videos for this. There are quite a few on this calculator and others that work like it does. One cool feature is the 'QR code' creator that puts a QR code on the screen you can scan with your phone to get graphical representations of functions through the Casio app that you would be able to put into projects. Nice. If you're tempted to get a cheaper brand to save a couple of quid, don't bother. This is such a low price you may as well have the best. You won't get the great keyboard with a cheaper brand, or the speed, or the cool carbon-fibre effect body. Casios are always well built and last forever. This one weighs nothing but feels good and well built although the hard case it fits into is a little bit rattly and being white will show dirt. My only other criticisms are that some of the text on the keyboard is a bit too small to read comfortably, especially on the textured surface, and the same thing applies to some of the text on the screen too, like the list of scientific constants. And this comes in a blister pack that you have to destroy to open instead of a simple box you can keep. Small beer. Really, this is about as good as it gets. It's outstanding. Just get one.

### ⭐⭐⭐⭐⭐ Still Going Strong-A Worthwhile Investment
*by V***T on 1 September 2025*

I'm so happy with the calculator I purchased over a year ago; it has been a true workhorse. The display is still crystal clear, and the keys haven't faded or stuck, despite frequent use. The battery life has also been surprisingly good, and I haven't needed to replace it yet. I would absolutely recommend this calculator to anyone looking for a reliable and long-lasting tool. It's a great investment, and I'm very satisfied with my purchase.

## Frequently Bought Together

- CASIO FX-991EX Advanced Engineering/Scientific Calculator (UK VERSION), Black
- Ks3 Science Complete Revision & Practice - Higher (With Online Edition)
- Casio FX-991CW Scientific Calculator, 540 Functions and Natural Display

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*Product available on Desertcart Poland*
*Store origin: PL*
*Last updated: 2026-05-22*