---
product_id: 48101544
title: "Casio FX-991ES Plus Scientific Calculator"
brand: "casio"
price: "50 DH"
currency: MAD
in_stock: false
reviews_count: 4
url: https://www.desertcart.ma/products/48101544-casio-fx-991es-plus-scientific-calculator
store_origin: MA
region: Morocco
---

# Natural Textbook Display for easy comprehension Solar powered + battery backup Random Integers & improved equation mode Casio FX-991ES Plus Scientific Calculator

**Brand:** casio
**Price:** 50 DH
**Availability:** ❌ Out of Stock

## Summary

> 🧠 Elevate your calculations with clarity and power — don’t get left behind!

## Quick Answers

- **What is this?** Casio FX-991ES Plus Scientific Calculator by casio
- **How much does it cost?** 50 DH with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.ma](https://www.desertcart.ma/products/48101544-casio-fx-991es-plus-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

- • **Power That Lasts:** Solar powered with battery backup ensures uninterrupted performance
- • **Effortless Clarity:** Natural-V.P.A.M. display mirrors textbook math for instant understanding
- • **Trusted Reliability:** Backed by a 3-year guarantee for peace of mind
- • **Exam-Ready Precision:** Recommended for Advanced GCSE, A/AS level, and Highers — your academic edge
- • **Advanced Calculation Modes:** Includes Random Integers and enhanced equation functions for complex problems

## Overview

The Casio FX-991ES Plus is a solar-powered scientific calculator featuring a large Natural Textbook Display that presents math expressions exactly as in textbooks, enhancing comprehension. It supports advanced functions like Random Integers and improved equation modes, making it ideal for Advanced GCSE, A/AS level, and Highers. Lightweight and reliable, it comes with a 3-year guarantee, though it is now replaced by the FX-991EX model.

## Description

Full description not available

## Features

- This model is now obsolete and has been replaced with the Casio FX-991EX Advanced Scientific / Engineering calculator”
- Recommended for Advanced GCSE, A/AS level and Highers
- This ever popular model is now available with Random Integers and an improved equation mode
- Solar Powered with Battery backup
- 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
- 3 year guarantee
- NB. This Model can not be used in some Exams in Eire. Please check first. User manual (PDF )can be found below.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Casio |
| Brand | Casio |
| Model Number | CS13486 |
| Product Dimensions | 2.5 x 3.3 x 1.5 cm; 95.25 g |
| Batteries | 1 LR44 batteries required. |
| Colour | 1 |
| Material Type | Plastic |
| Number of Items | 51 |
| Size | 1 |
| Lines Per Page | 2 |
| Manufacturer Part Number | FX-991ESPLUS-SA-UH |
| Item Weight | 95.2 g |

## Product Details

- **Brand:** Casio
- **Colour:** 1
- **Calculator Type:** Engineering/Scientific
- **Power source:** Dual Powered / Solar and Battery
- **Screen size:** 2.51
- **Number of batteries:** 1 LR44 batteries required.
- **Model name:** FX 991ESPLUS
- **Material:** Plastic
- **Product dimensions:** 25L x 33W millimetres
- **Display type:** LCD

## Images

![Casio FX-991ES Plus Scientific Calculator - Image 1](https://m.media-amazon.com/images/I/61t-ja8Y9eL.jpg)

## Questions & Answers

**Q: Is this allowed in Edexcel A Level (GCE) Exams?**
A: Yes, but it's no longer adequate for the new A levels.  You need the new version, the 991-EX.

**Q: Does this have the recurring number feature where it displays the dot above the recurring number?**
A: Hi. Unfortunately there isn't this feature, but it does display for example 0.333333333333... for 1/3.

**Q: Can this calculator do mod, as in, modular arithmetic (used in computer science and cryptography)? e.g. 21 % 6 = 3; 50 % 21 = 8; 24 % 12 = 0**
A: No, but it is dead simple to calculate, even on the Casio FX-85GT Plus.  Do the division, it will be displayed in fraction form. Then press "Shift S--D" to transform the result in mixed fraction form. The modulus is the nominator of the fraction. Simple as that! I use this often while doing computer programming.

**Q: Will it solve matrix equations**
A: It will find the inverse of 2x2 or 3x3 matrices, if one exists, so if you're thinking of matrix solutions to simple, linear, simultaneous equations, with up to 3 variables, then yes. If you're thinking of anything else, then no, but you can carry out matrix multiplication, addition and subtraction, when possible, with matrices up to 3x3.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Perfect GCSE & A-Level Calculator
*by E***M on 30 April 2012*

Prior to this calculator, I used a Casio FX 991 ES (an old model). After losing it, I decided to upgrade to the ES-Plus. I was pleased to have upgraded -- the ES-Plus is a fully featured calculator yet the features are not too intrusive to hinder every day, 'casual' operations (such as simple addition).When wanting to do something a little more complex (e.g. complex numbers, vector products, matrices etc.), a simple shift into a different mode and the calculator becomes even more powerful. A particular feature which is useful for the GCSE mathematician is the equation solving function (which can be used to check an answer after working it out by hand) -- this can be used to solve linear, quadratic and cubic equations. For AS and A2 mathematicians, the statistic functions (such as regression) are useful -- regression calculations can take a lot of working, so it's satisfying to be able to check that you're right using a calculator function! Complex/Imaginary modes and vector modes are particularly helpful in Further Pure modules. Another feature which I found useful is the 'table' function -- this allows you to calculate a series of values for a certain function in a certain range. I have used this many times in Further Pure 2 when having to draw polar graphs!Arguably, the build quality isn't superb, but you have to remember that this is one of the cheapest calculators you can buy: and for how powerful it is, it is certainly worth it.

### ⭐⭐⭐⭐⭐ Multi-functional and overall fantastic
*by D***2 on 29 May 2014*

It has Calculus functions, Solving equations (up to and including cubic) and complex number functionality. Trig and most other basic things are there too like surds and. Display is fantastic in both clarity and the way it displays fractions as... real fractions. Wish they did include the reccuring decimal functionality like they do in the fx-85GT PLUS but it's nothing major just a bit of missed opportunity. I'd highly reccomend for both GCSE Maths and OCR's FSMQ Additional Mathematics (As well as A-Level Maths). The conversion functionality is good but I rareley use it (40 conversions available (20 'types' but back and forth like in->cm , cm->in)). You can also change the 'base' (do your calculations in hexadecimal for example) but this too is not really useful for me but could come in handy for some people.Overall, good buy, a little more expensive than other calculators but totally worth it even just for the calculus functions.

### ⭐⭐⭐⭐⭐ Best Calculator Available
*by R***N on 3 April 2013*

Casio have always been the best calculators and after much wear and tear over the years I decided to replace my old casio to the top range model. I can't say I am disappointed, it does everything you could ask for from a calculator as well as a host of stuff you probably wont. It has been polished from my previous model and the ability to add fractions after you've typed numbers as well as being able to navigate more complicated fractions just make it easier to use. Some functions such as numerical differentiation and integration are also extremely useful, especially just for checking answers, which I found particularly helpful for my C3/C4 A level exams. I'm hoping this calculator shall stay with me through university and beyond. All in all you can't really ask for much more from a calculator, and easily worth much more than it is.

## Frequently Bought Together

- Casio FX-991ES Plus Technical and Scientific Calculators,White
- Casio Fx-991ESPlus-2 Technical And Scientific Calculator Fx-991Es Plus 2Nd Edition

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*Product available on Desertcart Morocco*
*Store origin: MA*
*Last updated: 2026-03-10*