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Casio

Casio fx-991ES Plus 2 Scientific Calculator with 417 Functions and Display, Natural

  • Based on 2,724 reviews
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Availability: Only 1 left in stock, order soon!
Fulfilled by Amazon
Arrives Monday, Jun 22
Order within 54 minutes
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Features

  • Admitted to maturity exams
  • Natural display to insert and display numeric expressions as they appear on textbooks
  • 24 levels of brackets
  • Regression and correlation coefficients
  • Solar Power and Battery.Dimensions: 1.5 x 7.5 x 16.2 cm

Description

The fx-991es plus 2 is a scientific calculator ideal for secondary school and university degrees with natural ‘natural textbook display’ to display formulas and results exactly as in textbooks. Equipped with 417 functions, including: Equation resolution, calculation of synthesis values and variability indexes, matrix and vector calculation, regression and correlation coefficients, complex numbers, calc key (temporary memory formula), 40 physical constants, integral and differential calculus Combined power supply: Solar and alkaline button cell LR-44.

Brand: Casio


Color: natural


Calculator Type: Engineering/Scientific


Power Source: Solar Powered


Screen Size: 10 Centimeters


Calculator Type: Engineering/Scientific


Power Source: Solar Powered


Screen Size: 10 Centimeters


Number of Batteries: 1 A batteries required. (included)


Compatible Devices: calculator


Color: natural


Enclosure Material: Plastic


Item Dimensions L x W: 6.38"L x 2.95"W


Brand: Casio


Model Name: fx-991ES Plus 2


Manufacturer: CASIO


Mfr Part Number: fx-991ES PLUS-2


Model Number: fx-991ES PLUS-2


Item Weight: 95 Grams


Item Type Name: Scientific calculator with 417 functions and display


Unit Count: 1.0 Count


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, Jun 22

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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  • Financing through Apple Pay
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Top Amazon Reviews

    • Reliable Class Icon!
The Casio fx-991ES Plus 2nd Edition is a perfect blend of "old school" dependability and modern functionality. It maintains the legendary Casio quality that has made it a staple in classrooms and engineering offices for years. What I love: Natural Textbook Display: This is a total game-changer. It displays fractions, roots, and exponents exactly as they appear in textbooks, making complex equations much easier to input and understand. Incredible Functionality: With 417 functions, it handles everything from basic trigonometry and statistics to advanced calculus, matrix calculations, and equation solving with ease. Bulletproof Build: The redesigned body feels solid and durable, featuring wear-resistant printing and a secure slide-on hard case that stands up to daily use in a backpack. Dual Power Reliability: The combination of solar and battery power (LR44) means it’s always ready to go, whether you're in a brightly lit lab or a dimly lit lecture hall. Intuitive Layout: The color-coded keypad and ergonomic design make it easy to navigate, striking a great balance between high-end features and simple, no-fuss operation. Whether you’re a student or a pro, this calculator is a reliable "math companion" that offers exceptional performance and value. It's a five-star workhorse that gets the job done every time. ... show more
Reviewed in the United States on February 23, 2026 by Amazon Customer
    • Perfect Perfect
Review Image by Cesar
Review Image by Cesar
Top-notch scientific calculator. Natural Textbook Display, 417 functions, compact & durable. Perfect for math, physics, or engineering students
Reviewed in the United States on February 9, 2026 Reviewed in the United States on February 9, 2026 by Cesar
    • Good
Good for school
Reviewed in the United States on December 24, 2025 by Dillon Goellner
    • Excelente
Muy bien producto, mi hija la usa para la universidad y ha sido de gran ayuda para ella
Reviewed in the United States on May 10, 2026 by Katherine Hernández Molano
    • Muy buena
Casio es lo mejor en calculadoras
Reviewed in the United States on April 6, 2026 by Oscar Tello
    • Solar Wow!
My kid says it works great! The price wasn't too bad either. My child was able to find and use all the functions a bit easier than other scientific calculators before. The box did come in a bit beat up but all good so far.
Reviewed in the United States on January 30, 2026 by KenKen
    • Working
It's good
Reviewed in the United States on March 31, 2026 by Jaime
    • Best Algebraic for FE/PE Best Algebraic for FE/PE
Review Image by EE/IE
Need to take the FE/PE? The test is limited to a few models. This is the best algebraic allowed: 1) good menu organization, easy to use 2) 2nd and 3rd degree polynomial solvers 3) 2 and 3 element matrices and vectors 4) numeric derivatives and integrals 5) complex numbers 6) engineering notation 7) constants and conversions All built-in, no need to program. A big plus is cost is nominal. One drawback to this model is it slides all over. Add rubber feet to case bottom as a fix. (see pic) ... show more
Reviewed in the United States on July 17, 2024 Reviewed in the United States on July 17, 2024 by EE/IE

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