Calculator

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This online calculator provides the full functionality of a standard handheld calculator and more. The interface is designed for ease of use on both desktop and mobile devices, featuring large, responsive buttons for touch and mouse input.

Calculator Functions and Usage

The following sections provide a complete reference for all operations available on this calculator.

Basic Operations

  • Arithmetic (+, −, ×, ÷): Standard operators for basic math.
  • Equals (=): Executes the pending operation and displays the final result.
  • Plus/Minus (+/-): Toggles the sign of the number currently displayed.
  • Decimal Point (.): Allows for the entry of floating-point numbers.

Clear Functions

  • AC/CE Button: This button has dual functionality.
    • Clear Entry (CE): The first press clears only the number you are currently entering, allowing you to correct a mistake without losing the rest of your calculation.
    • All Clear (AC): Pressing the button a second time (or when the entry is already 0) will completely reset the calculator, clearing the current entry, any pending operations, and the memory.

Advanced & Scientific Functions

  • Percentage (%): A context-aware function for percentage-based calculations.
  • Square Root (√x): Calculates the square root of the currently displayed number. An error will be shown for negative numbers.
  • Pi (π): Replaces the current display value with the mathematical constant Pi.
  • Exponent (xy): Calculates the power of a number. (e.g., `2` `xy` `3` `=` results in `8`).
  • Round to 2 Decimals (R2): Rounds the displayed number to two decimal places (cents).
  • Round to 0 Decimals (R0): Rounds the displayed number to the nearest whole number (dollars).

Memory Functions

Memory functions are used to store a number for use in multi-step calculations.

  • Memory Clear (mc): Clears the value stored in memory, resetting it to zero.
  • Memory Recall (mr): Retrieves the number from memory and places it on the display.
  • Memory Subtract (m-): Subtracts the number currently on the display from the value in memory.
  • Memory Plus (m+): Adds the number currently on the display to the value in memory.

Order of Operations: Sequential Calculation

It is critical to understand that this is a **sequential calculator**. It does not follow the standard mathematical order of operations (PEMDAS/BODMAS). It calculates results in the order they are entered.

For example, `2 + 3 * 4 =` will result in **20**, not 14. To get the correct result, you must enter `3 * 4 =` first, and then `+ 2 =`.