Original Scientific Calculator - fx991ES PLUS

🔢 Casio fx‑991ES PLUS Scientific Calculator – 417 Functions

The Casio fx‑991ES PLUS is a top-tier, non‑programmable scientific calculator featuring 417 built‑in functions, a Natural Textbook Display, and dual power.

 Whether you're a student, engineer, or math enthusiast, this reliable device ensures quick, precise calculations for a wide range of academic and professional needs.

🌟 Key Features

Natural Textbook Display: Dot-matrix screen mirrors textbook formulas and expressions, making interpretations easy

417 Functions: Includes fractions, exponentials, logarithms, trigonometry, complex numbers, matrices, integration, differentiation, statistics, and equation solving .

417 Functions & Advanced Modes: Equation Editor, Random Integers generation, base‑n, vectors/matrices, and unit conversions

409 Scientific Constants & Conversions: Includes common physical constants and 40 unit conversion tool.

✅ Why Choose This Calculator?

Educator & Exam Trusted: Approved for exams like SAT, JEE, NEET; ideal for high school to university-level STEM courses.

Student-Friendly: Replay and editing features let you review and modify calculations without re-entering them.

Professional Grade: With functions covering calculus and statistics, it's suitable for engineers, data analysts, and researchers.

Durable & Economical: Built to last, with solar-battery backup and a protective casing.