Casio FX-991ES Plus scientific calculator with 580 functions, dual solar and battery power, LCD display, and 215 g lightweight design for students and professionals.
Casio FX-991ES Plus Scientific Calculator – Advanced 580-Function Calculator for Students and Professionals
The Casio FX-991ES Plus is a battery- and solar-powered scientific calculator designed for complex mathematical calculations. With 580 built-in functions, it covers everything from basic arithmetic to advanced statistical and matrix operations.
580 scientific functions support algebra, calculus, statistics, and matrix calculations
Dual power supply (battery and solar) ensures reliable operation in any setting
LCD dot-matrix display with 1-line readout for clear, readable results
Compact and lightweight design at 215 g — fits easily in a bag or pocket
What Sets the FX-991ES Plus Apart
The FX-991ES Plus combines a comprehensive function set with an intuitive layout, making it suitable for both classroom and professional use. Unlike programmable models, it focuses on direct, reliable computation without the complexity of programming — ideal for users who need consistent, accurate results every time.
Ideal for...
High school and university students tackling advanced mathematics, physics, or engineering coursework. Also well-suited for professionals in finance, engineering, and data analysis who require a dependable scientific calculator for daily numerical tasks.
Application of the Casio FX-991ES Plus
Power on using the solar cell or replace the battery when the display dims
Select the appropriate mode (COMP, STAT, MATRIX, etc.) via the mode button
Enter the calculation using the keypad and review the result on the LCD display
Use the multi-replay function to review and edit previous calculations
Casio is a Japanese electronics manufacturer founded in 1946, known for producing reliable calculators, watches, and digital instruments. The brand has a strong presence in the educational and professional calculator market, with the FX-991 series being one of its most recognised scientific calculator lines.
The FX-991ES Plus is a scientific calculator designed for advanced mathematical, statistical, and matrix calculations, suitable for students and professionals in STEM fields.
No, the FX-991ES Plus is a standalone, programmable-free calculator that operates independently with battery and solar power — no external device or software required.
580 scientific functions, LCD dot-matrix display, 1-line readout, battery and solar dual power, 215 g weight, non-programmable, grey finish.
The delivery includes the Casio FX-991ES Plus calculator. A protective case or additional accessories are not specified in the manufacturer's data.
The Casio FX-991ES Plus comes with a 24-month manufacturer warranty, providing coverage for material and manufacturing defects.
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