---
product_id: 48591129
title: "CASIO FX-991EX Advanced Engineering/Scientific Calculator (UK VERSION), Black"
brand: "casio"
price: "S/.20"
currency: PEN
in_stock: false
url: https://www.desertcart.pe/products/48591129-casio-fx-991ex-advanced-engineering-scientific-calculator-uk-version-black
store_origin: PE
region: Peru
---

# 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:** S/.20
**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?** S/.20 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.pe](https://www.desertcart.pe/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

Great prices on your favourite Office brands plus free delivery and returns on eligible orders.

## 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 | 12,464 in Stationery & Office Supplies ( See Top 100 in Stationery & Office Supplies ) 46 in Scientific Calculators |
| Brand Name | Casio |
| Calculator Type | Engineering/Scientific |
| Colour | Black |
| Customer Reviews | 4.7 4.7 out of 5 stars (9,513) |
| 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 |
| Number of Batteries | 1 CR123A batteries required. (included) |
| 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.

## 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 Peru*
*Store origin: PE*
*Last updated: 2026-05-21*