CASIO FX‑991ES PLUS Scientific Calculator – Specifications for Website
The CASIO FX-991ES PLUS is a reliable scientific calculator designed for students and professionals who require advanced mathematical functions. It features Natural Textbook Display technology that shows equations exactly as they appear in textbooks, making calculations easier to read and understand. With 417 built-in functions, dual power supply, and advanced scientific capabilities such as matrix, vector, and equation calculations, it is widely used for education and engineering applications.
Key Features
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417 built-in scientific functions
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Natural Textbook Display (Natural-V.P.A.M.)
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Dot matrix LCD screen for clear expression display
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Matrix and vector calculations
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Integration and differentiation functions
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Equation solver and CALC function
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Statistical calculations with list-based data editor
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Dual power supply (Solar + Battery)
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Slide-on hard protective case included
Specifications
| Feature | Details |
|---|---|
| Brand | CASIO |
| Model | FX-991ES PLUS |
| Calculator Type | Scientific Calculator |
| Programmable | No |
| Number of Functions | 417 |
| Display Type | Dot Matrix LCD |
| Display Format | Natural Textbook Display |
| Display Digits | 10 + 2 digits |
| Display Resolution | 96 × 31 pixels |
| Variables | 9 |
| Internal Calculation Digits | 15 |
| Nested Parentheses | Up to 24 levels |
| Memory | Independent Memory (M+, M-, M) |
| Power Source | Solar + 1 × LR44 Battery |
| Battery Life | Approx. 3 years |
| Dimensions | 161.5 × 77 × 11.1 mm |
| Weight | Approx. 95 g |
| Accessories | Slide-on Hard Case |
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