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Explore our advanced scientific calculator with 417 functions for middle to university students. It covers basic to complex scientific, exponential, trigonometric, fractions. Ideal for math, calculus, statistics, algebra, geometry, and physics. Essential for any math-related studies.
2 line Display Calculators
Scientific calculators display both input and result simultaneously, minimizing errors to the greatest extent possible
With Protective Cover
Comes with a slide-on hard case to protect the buttons and body of the device.
Dual Power Supply
Use the scientific calculators anytime, anywhere, without worrying about the battery.
High Sensitivity Button
The button sensitivity of the handheld scientific calculator is high, the printing is very clear, and the user experience is better.
Travis Cannon
Reviewed in the United States on January 21, 2025
Do not recommend this product. It was giving me divisons in fractions instead of decimals and there arent any instructions online on how to change it. Support your product. Waste of money.
RTMPX
Reviewed in the United States on December 29, 2024
I am quite pleased with this calculator. It comes programed with multiple functions, in some cases going beyond a typical scientific calculator. Vector, matrix, probability, integral, or statistical calculations, this calculator can handle surprisingly many of them. As a primary user of TI calculators, I found transitioning to the Dupota calculator a bit challenging due to the learning curve. As long as the protective buyer is okay with that, this solar calculator is extremely powerful and a great choice.
Arman
Reviewed in the United States on December 22, 2024
This calculator has been a great tool for school! The 552 functions cover everything I need, and the two-line display makes it easy to track my calculations. It’s reliable, and the solar battery is a huge plus for not having to worry about changing batteries.
JG
Reviewed in the United States on December 21, 2024
It got the job done!
Rebekah
Reviewed in the United States on December 18, 2024
This calculator is a useful tool for simple math. The solar and battery operation is reliable, and the display is clear and easy to read. It’s lightweight yet durable. It's easy to navigate all the functions, but this calculator gives some answers in fraction form. Sometimes this wasn’t a problem for me, but it was inconvenient on tests. I couldn't figure out which function converts the fraction to a decimal or if it had a function like that at all.
Xoxo
Reviewed in the United States on December 10, 2024
Had to get a non-graphing for a university course. This one fits the bill, sustains small drops, and is pretty comfortable to hold.
Shiva
Reviewed in the United States on November 4, 2024
The OA-991EX Plus Scientific Calculator is an excellent choice for both students and instructors. It includes 552 functions and can readily handle everything from elementary algebra to more complex computations. The two-line display includes both the issue and the answer, making it simple to follow along. With solar and battery power, you won't have to worry about running out. This calculator is reliable, simple to use, and ideal for students!
2L student
Reviewed in the United States on October 27, 2024
I got this for my kid to have a calculator that she can take back and forth to school without having to worry so much if it gets damaged or lost. We have another brand name calculator that she leaves at the house, and this one seems to do everything that the more expensive one does. Granted we will probably never need or use 95% of the features. It seems reasonably well made with no issues going back and forth thrown in a backpack.
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