How to Use This Basic Calculator

This calculator performs the four fundamental arithmetic operations: addition, subtraction, multiplication, and division. It supports parentheses for grouping and follows the standard order of operations (PEMDAS/BODMAS).

Keyboard Shortcuts

Type numbers 0-9, operators + - * /, parentheses ( ), and decimal . directly. Press Enter to calculate, Backspace to delete, Escape to clear all.

Order of Operations

The calculator evaluates expressions using standard mathematical precedence. For example, 2 + 3 * 4 returns 14 (not 20) because multiplication is performed before addition.

Calculation History

Recent results appear below the buttons. Click any entry to reload that value for further calculations. History is session-only and clears when you leave the page.

Common Uses

• Shopping: Add up prices and verify totals
• Bill splitting: Divide totals by number of people
• Cooking: Double or halve recipe measurements
• Homework: Check arithmetic work before submitting