---
product_id: 1161647
title: "Casio FX-991ES / FX-991-ES-PLUS Calculator"
brand: "casio"
price: "₩2859"
currency: KRW
in_stock: true
reviews_count: 13
url: https://www.desertcart.kr/products/1161647-casio-fx-991es-fx-991-es-plus-calculator
store_origin: KR
region: South Korea
---

# Natural textbook display for intuitive reading Multi replay to edit & review calculations List-based statistical data entry Casio FX-991ES / FX-991-ES-PLUS Calculator

**Brand:** casio
**Price:** ₩2859
**Availability:** ✅ In Stock

## Summary

> 🧠 Master your math game with Casio FX-991ES — where precision meets power!

## Quick Answers

- **What is this?** Casio FX-991ES / FX-991-ES-PLUS Calculator by casio
- **How much does it cost?** ₩2859 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/1161647-casio-fx-991es-fx-991-es-plus-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

- • **Advanced Calculus Ready:** Perform differential and integral calculus with ease—perfect for engineering and STEM pros.
- • **Compact & Durable Design:** Slide-on hard plastic case protects your calculator on the go, fitting perfectly in your professional toolkit.
- • **True-to-Textbook Display:** See formulas and results exactly as they appear in textbooks for seamless learning and presentation.
- • **Trusted by Future Leaders:** Ideal for Keystages 3, 4 and beyond—join thousands of students and professionals who rely on Casio.
- • **Effortless Equation Editing:** Instantly revisit and tweak your calculations with multi replay—no more starting over.

## Overview

The Casio FX-991ES scientific calculator features a natural textbook display, multi replay function for editing calculations, and list-based statistical data entry. Lightweight and protected by a slide-on hard plastic case, it supports advanced calculus operations and is ideal for students and professionals from Keystage 3 upwards.

## Description

Casio Fx-991es Scientific Calculator

Review: Great calculator! - This calculator is really great! My roommate has had this calculator for all of college so far (we are seniors) for engineering work, and he loves it. After getting this and getting used to it, I really love it. The ability to go back and modify equations and also to do differential and integral calculus is very useful.
Review: Five Stars - Great price - works great

## Features

- Natural textbook display
- List-based statistical data entry
- Multi replay
- Slide on hard plastic case
- Ideal for Keystages 3, 4 and above

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0009FHRPW |
| Batteries | 1 Lithium Ion batteries required. (included) |
| Customer Reviews | 4.4 4.4 out of 5 stars (565) |
| Date First Available | August 6, 2012 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 3.7 ounces |
| Item model number | 271239 |
| Language | English |
| Manufacturer | Casio |
| Product Dimensions | 3.15 x 6.46 x 0.48 inches |

## Product Details

- **Brand:** Casio
- **Calculator Type:** Engineering/Scientific
- **Color:** Silver
- **Number of Batteries:** 1 Lithium Ion batteries required. (included)
- **Power Source:** Battery Powered

## Images

![Casio FX-991ES / FX-991-ES-PLUS Calculator - Image 1](https://m.media-amazon.com/images/I/61brq8LPK2L.jpg)
![Casio FX-991ES / FX-991-ES-PLUS Calculator - Image 2](https://m.media-amazon.com/images/I/61fhnkp0JDL.jpg)

## Questions & Answers

**Q: i wana ask which is better for university eng major this one or the 115es ?**
A: You need to be careful on this one- my son has the ES. Some schools will not let you use the calculators with graphing on them! Check with your engineering dept. Also, you might want a different calculator for your math classes. My son has both, but uses the ES for his engineering.

**Q: Does this Casio replay the equation that you were working on, after it times-out and you turn it back on?**
A: If you after it turns off ?It doesnt replay your equation after it turns off then turn it back on. It only shows the last answer that was calculated. It can only memorize the last output before shutting down

**Q: is it the old model of fx-991es or the new fx-991es plus**
A: fx-991es only

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great calculator!
*by M***R on November 23, 2013*

This calculator is really great! My roommate has had this calculator for all of college so far (we are seniors) for engineering work, and he loves it. After getting this and getting used to it, I really love it. The ability to go back and modify equations and also to do differential and integral calculus is very useful.

### ⭐⭐⭐⭐⭐ Five Stars
*by K***N on May 11, 2015*

Great price - works great

### ⭐⭐⭐⭐ Great calculator with great value for money
*by A***K on September 15, 2014*

Amazing calculator does everything you would want on something that's not a GDC

## Frequently Bought Together

- Casio FX-991ES / FX-991-ES-PLUS Calculator
- Casio fx-991ES Plus 2 Scientific Calculator with 417 Functions and Display, Natural
- (Spanish Version) Casio FX-991ES Plus-2nd Edition Scientific Calculator

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*Product available on Desertcart South Korea*
*Store origin: KR*
*Last updated: 2026-03-04*