➗ Math Calculator: Complete User Guide
A powerful, feature-rich calculator for everyday arithmetic and advanced operations.
🔢 Basic Operations
Addition (+), subtraction (−), multiplication (×), division (÷) with full decimal support and correct order of operations.
⚡ Advanced Functions
Squares (x²), square roots (√), reciprocals (1/x), percentages (%), sign toggle (+/-), and full calculation history.
How to Use the Math Calculator
- Click numbers or use your keyboard number keys to enter values.
- Press an operator button (+, −, ×, ÷) or keyboard key to set the operation.
- Enter the second number for the calculation.
- Press = or Enter to get the result instantly.
- Use AC to clear all, ⌫ to delete last digit, +/- to toggle sign, or % for percentages.
⌨️ Keyboard Shortcuts
0-9 — Enter numbers
+ - * / — Operators
Enter or = — Calculate
Backspace — Delete last digit
Escape — Clear all (AC)
. (period) — Decimal point
📐 Order of Operations (PEMDAS / BODMAS)
This calculator follows the universal mathematical order of operations:
Frequently Asked Questions
Is this math calculator free to use?
Yes, 100% free. No registration, no subscription, no hidden fees. Use it unlimited times on any device.
Does the calculator follow order of operations (PEMDAS)?
Yes. Our calculator correctly applies PEMDAS/BODMAS: Parentheses → Exponents → Multiplication/Division → Addition/Subtraction.
Can I use keyboard input?
Yes! Use number keys (0–9), operators (+, -, *, /), decimal point (.), Enter or = to calculate, Backspace to delete, and Escape to clear all.
What happens if I divide by zero?
Division by zero is mathematically undefined. The calculator will display an "Error: Cannot divide by zero" message to protect you from an incorrect result.
How does the percentage (%) button work?
Press % to divide the current number by 100. For example: enter 500, press +, enter 15, press % — the result is 575 (500 + 15% of 500). Perfect for calculating discounts, tax, and tips.