Standard Calculator

Perform essential arithmetic operations with our free online standard calculator. Designed for everyday calculations, this tool features a clean interface, memory functions, keyboard shortcuts, and follows proper mathematical order of operations (PEMDAS/BODMAS). Perfect for quick calculations, homework, work tasks, or any situation where you need reliable basic math functionality.

Calculator

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How to Use This Calculator

  1. Enter Numbers: Click number buttons (0-9) or use your keyboard to input values. The calculator displays your current entry.
  2. Choose Operations: Click operation buttons (+, −, ×, ÷) or use keyboard shortcuts (+, -, *, /) to select your mathematical operation.
  3. Calculate Results: Press the equals button (=) or Enter key to perform the calculation and display the result.
  4. Use Memory Functions: Store values with MS, recall with MR, add to memory with M+, or clear memory with MC for complex calculations.
  5. Clear When Needed: Use CE to clear the current entry or C to clear everything and start fresh.

Keyboard Shortcuts

  • Numbers: 0-9 keys
  • Operations: + (add), - (subtract), * (multiply), / (divide)
  • Calculate: Enter key or = key
  • Clear Entry: Delete or Backspace
  • Clear All: Escape key
  • Decimal: . (period) key

Understanding Order of Operations

This calculator follows the standard mathematical order of operations, also known as PEMDAS (Parentheses, Exponents, Multiplication and Division, Addition and Subtraction) or BODMAS (Brackets, Orders, Division and Multiplication, Addition and Subtraction). This ensures that expressions are evaluated correctly according to mathematical conventions.

For example, the expression "2 + 3 × 4" equals 14, not 20, because multiplication is performed before addition. The calculator automatically applies these rules, so you can enter expressions naturally and get mathematically accurate results.

Memory Functions Explained

Memory functions help you store and recall numbers during complex calculations:

  • MS (Memory Store): Saves the currently displayed number to memory
  • MR (Memory Recall): Displays the number stored in memory
  • M+ (Memory Add): Adds the current display to the number in memory
  • MC (Memory Clear): Clears the memory (removes the stored number)

When a number is stored in memory, an "M" indicator appears next to the display to remind you that memory contains a value.

Frequently Asked Questions (FAQ)

FAQ Index

Click number buttons to enter values, then use operation buttons (+, -, ×, ÷) to perform calculations. Press equals (=) to see the result. You can also use keyboard input for faster calculations.

The calculator follows PEMDAS/BODMAS: Parentheses, Exponents, Multiplication and Division (left to right), Addition and Subtraction (left to right). This ensures mathematically correct results for complex expressions.

Memory Store (MS) saves the current value, Memory Recall (MR) displays the saved value, Memory Clear (MC) deletes stored value, and Memory Add (M+) adds current value to memory. Memory is useful for storing intermediate results.

Yes! Use number keys (0-9), operators (+, -, *, /), Enter or = for equals, Delete or Backspace to clear, and Escape to clear all. Keyboard input makes calculations faster and more efficient.

The calculator handles up to 10 decimal places for precision while avoiding floating-point errors. Very long decimal results are rounded to maintain readability and accuracy.

C (Clear) resets the entire calculator including any ongoing calculations, while CE (Clear Entry) only clears the current number being entered, allowing you to correct mistakes without starting over.