Casio FX-991EX Calculator

Professional Power with the Casio FX-991EX ClassWiz

High-Performance Calculation for STEM Excellence

The Casio FX-991EX represents the pinnacle of non-programmable scientific calculators. Part of the ClassWiz series, it features a high-resolution “Natural Textbook Display” that makes equations and data easy to read. Its powerful processor handles complex calculations—such as $4 times 4$ matrices and simultaneous equations with four unknowns—at lightning speeds, making it an essential companion for engineering, physics, and advanced mathematics students.

Technical Specifications & Features

• High-Resolution LCD Display: A $192 times 63$ dot-matrix screen that provides crystal-clear text and symbols, allowing for more data to be displayed at once.
• 552 Integrated Functions: Comprehensive tools for calculus, algebra, statistics, and vector analysis.
• Online Visualization Service: Generate a QR code for any calculation to view graphs and charts on your smartphone or tablet via the Casio EDU+ app.
• Advanced Spreadsheet Function: Perform basic spreadsheet tasks like sums, means, and standard deviations directly on the calculator.
• Natural Textbook Display: Fractions, powers, logarithms, and roots are displayed exactly as they appear in academic textbooks.
• Two-Way Power: Solar-powered with a battery backup ensures the calculator is always ready for exams or long study sessions.
• Sleek Carbon Fiber Texture: A modern, professional design with high-quality tactile keys for precise data entry.
• Non-Programmable: Permitted for use in most international and regional standardized examinations.

Ideal For

• University Students: Particularly those in Engineering, Mathematics, and Computer Science fields.
• Advanced High School Curricula: Perfect for AP, IB, and A-Level mathematics and science courses.
• Professional Use: A reliable, fast tool for laboratory research and field engineering calculations.