How this calculator works
This calculator evaluates the full expression you type, respecting the standard order of operations: multiplication and division before addition and subtraction. The percent key converts a number to its decimal form, so 200 × 10% gives 20.
Keyboard shortcuts
Digits, + - * /, parentheses and . all work from the keyboard. Enter calculates, Backspace deletes the last character, and Escape clears everything.
Frequently asked questions
Does this calculator follow order of operations?
Yes. 2 + 3 × 4 gives 14, not 20, because multiplication is done before addition, just like a scientific calculator.
Can I use my keyboard?
Yes — digits, operators, Enter for equals, Backspace to delete and Escape to clear all work.
Is this calculator free?
Yes, completely free with no sign-up or download.