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CASIO / SCIENTIFIC

fx-991ES PLUS-2
simulator.

A scientific calculator inspired by the fx-991ES PLUS 2nd edition. Explore core arithmetic, trigonometry, logarithms and powers in an interactive layout.

01 Interactive keys02 Keyboard support03 Calculation history
Official model specifications ↗
Casiofx-991ES PLUS-2
DEGSCI
0
0
Ready
⌨ Type numbers and operators · Enter to calculate · Esc to clear
MODEL NOTES

What works today.

This is an independent simulator. Its current calculation core covers the functions below. It does not yet reproduce every hardware mode, screen behavior or physical detail.

Available now

✓Arithmetic and parentheses
✓Degree and radian trigonometry
✓Inverse trigonometry
✓Logarithms and powers
✓Factorial, percent and constants
✓Answer memory and history

In development

○Natural textbook rendering
○Fractions and exact answers
○Matrix and vector modes
○Complex numbers
○Equation, integral and differential modes
○All 417 hardware functions
YOUR SESSION

Calculation history

Recent results remain in this browser tab. Select one to reuse its answer.

RECENT CALCULATIONS
  1. No calculations yet. Try 12 × 8.
Casio and fx-991ES PLUS-2 are trademarks of their respective owners. This independent educational simulator is not affiliated with or endorsed by the manufacturer.