Calculator
A simple, fast four-function calculator for everyday math.
About this tool
A simple, no-frills calculator for everyday math: add, subtract, multiply, divide, and percentages, right in your browser. For trigonometry, logarithms, powers, and a memory register, use the Scientific Calculator instead.
Frequently asked questions
- Can I use my keyboard?
- Yes — type numbers and operators directly, press Enter or "=" to calculate, Backspace to delete the last digit, and Escape to clear.
- What does the ± button do?
- It flips the sign of the current number between positive and negative.
- Why does dividing by zero show an error?
- Division by zero is mathematically undefined, so the calculator clears the display and shows a hint instead of a result.