i wana ask which is better for university eng major this one or the 115es ?

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.

Does this Casio replay the equation that you were working on, after it times-out and you turn it back on?

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

Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

Account Cart

Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

Account Cart

Casio FX-991ES / FX-991-ES-PLUS Calculator

Product ID: 1161647

Details

Brand
Casio
Calculator Type
Color
Silver
Number of Batteries
1 Lithium Ion
Power Source
Battery

📐Natural textbook display for intuitive reading

🔄Multi replay to edit & review calculations

🧮List-based statistical data entry

Details

Brand
Casio
Calculator Type
Color
Silver

Description

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

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.

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.

Specifications

ASIN	B0009FHRPW
Brand	Casio
Calculator Type	Engineering/Scientific
Color	Silver
Customer Reviews	4.6 4.6 out of 5 stars (568)
Global Trade Identification Number	04971850167037
Item Weight	105 g
Manufacturer	Casio
Mfr Part Number	FX-991ES
Model Number	271239
Number of Batteries	1 Lithium Ion batteries required. (included)
Power Source	Battery Powered

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.

Trustpilot

TrustScore 4.5 | 7,300+ reviews