Casio fx‑991ES Plus Scientific Calculator (2nd Edition)
Casio fx‑991ES Plus Scientific Calculator (2nd Edition)
The Casio fx‑991ES Plus‑2 Scientific Calculator (2nd Edition) is a high‑performance, feature‑packed calculator designed for students, engineers, and professionals. With 417 functions, a durable black design, and a 3‑year warranty, it delivers accurate results for complex mathematical, scientific, and statistical calculations.
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The Casio fx‑991ES Plus 2nd Edition Scientific Calculator is one of Casio’s most advanced and reliable models, designed for students, engineers, and professionals who need accuracy, speed, and powerful mathematical functionality. Featuring a Natural Textbook Display (NTD), it presents equations exactly as they appear in books—making learning and problem‑solving easier and more intuitive.
Powered by 417 built‑in functions, this upgraded 2nd Edition handles everything from basic arithmetic to complex calculus, including integration, differentiation, matrix operations, vector calculations, complex numbers, statistics, permutations & combinations, and more.
Engineered with both solar and battery power, it ensures consistent performance in any environment—ideal for exams, classrooms, and professional use. The durable slide-on hard case, high‑resolution dot‑matrix display, and 10+2 digit precision make it a dependable and long‑lasting companion for everyday academic and technical challenges.
Why This Calculator Stands Out
✅ Natural Textbook Display – Learn Faster, Solve Easier
Shows fractions, roots, and equations exactly like in textbooks for improved readability.
✅ 7 Advanced Functions for Engineering & Science
Includes calculus, statistics, matrix, vector, complex number calculations & more.
✅ Dual Power: Solar + Battery
Ensures reliable operation in all lighting conditions.
✅ High Precision 10+2 Digit Display
Accurate scientific and engineering calculations with a clear dot‑matrix screen.
✅ Lightweight and Durable Design
Comes with a slide‑on hard case for protection—perfect for students and fieldwork.
✅ Exam‑Friendly & Classroom Ready
Trusted by educators worldwide as a standard scientific calculator.
Key Specifications
| Feature | Details |
|---|---|
| Model | Casio fx‑991ES Plus 2nd Edition |
| Display | Natural Textbook Display, Dot‑Matrix Screen |
| Number of Functions | 417 |
| Power Source | Solar + Battery |
| Dimensions | 161.5 × 77 × 11.1 mm |
| Digits | 10+2 Digit Precision |
| Advanced Features | Integration, Differentiation, Matrix, Vector, Complex Numbers, Base‑N, Statistics, CALC & SOLVE functions |
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Summary
The Casio fx‑991ES Plus 2nd Edition is the perfect scientific calculator for students and professionals who demand accuracy, speed, and reliability. With 417 powerful functions, Natural Textbook Display, and solar + battery power, it delivers unmatched performance for engineering, mathematics, physics, and statistics.
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