Engineering Calculator

• sin / cos / tan: Standard trig functions. Press 2nd to switch to their inverses (asin, acos, atan).
• ln / log: Natural log (base e) and common log (base 10). Press 2nd for eˣ and 10ˣ.
• x² / √x: Square and square root. Press 2nd for cube and cube root.
• xʸ: Raise x to any power — type the base, press xʸ, then the exponent.
• n!: Factorial. Type a number then press n! — e.g. 5! = 120.
• 1/x: Reciprocal of the current value.
• sinh / cosh / tanh: Hyperbolic trig functions (not affected by DEG/RAD).
• π / e: Insert the mathematical constants pi (≈3.14159) and Euler's number (≈2.71828).
• MC / MR / M+ / M−: Memory clear, recall, add, subtract.
• Ans: Inserts the result of your last completed calculation so you can chain operations.

The DEG/RAD toggle at the top controls how angles are interpreted for trig functions.

DEG (degrees): sin(90) = 1. Use this for most everyday engineering and physics problems where angles are given in degrees.

RAD (radians): sin(π/2) = 1. Use this in pure mathematics, calculus, and when working with angular frequency.

Pressing 2nd activates the secondary function of several buttons, shown in the highlighted state. The key swaps are: sin↔asin, cos↔acos, tan↔atan, ln↔eˣ, log↔10ˣ, x²↔x³, √x↔∛x. Press 2nd again (or after any input) to return to primary mode.

• 0–9 + . : Digits and decimal point
• + − * /: Arithmetic operators
• Enter or =: Evaluate
• Backspace: Delete last character
• Escape: Clear all (AC)
• ^ : Power operator (xʸ)
• ( and ): Parentheses