Math Calculator
Free online math calculator for quick arithmetic. Type any expression with + - x / parentheses, powers and percentages to get an instant accurate answer.
About this tool
Sometimes you just need a quick answer to a messy calculation without opening a spreadsheet. Our free math calculator evaluates any arithmetic expression you type, following the correct order of operations.
It handles addition, subtraction, multiplication, division, powers, percentages-as-remainders, and parentheses. Type it, press Calculate, done.
How to use
Enter your expression using + - * / symbols, parentheses for grouping, and ^ for powers. For example, (250 + 75) * 1.2 computes the total after a 20 percent markup.
Press Calculate to see the result instantly. If the expression has a typo or cannot be evaluated, the tool tells you instead of guessing.
The math behind it
The calculator respects standard math precedence: parentheses first, then powers, then multiplication and division, then addition and subtraction, all left to right. Your input is sanitized so only numbers and math symbols are allowed, then evaluated by the browser's math engine.
The % symbol here means remainder (modulo), as in programming - 10 % 3 equals 1. It does not mean percent-of; for that, just divide by 100 yourself, like 250 * 15 / 100.