Math Calculator

Click or tap the expression input bar at the top of the calculator and type your expression directly — for example: 2*(3+4)^2 or sin(30)*cos(45). Press Enter or click = to evaluate. The calculator fully supports standard operator precedence and parentheses nesting.

The calculator includes: sin, cos, tan, asin (arcsin), acos (arccos), atan (arctan), log (base 10), ln (natural logarithm), sqrt (square root), cbrt (cube root), x² (square), x³ (cube), xʸ (power), n! (factorial), |x| (absolute value), floor, ceil, round, and constants π (pi) and e (Euler's number).

Every calculation is automatically saved to your browser's localStorage — no account, no server, no sign-up needed. History persists between sessions. Click any history entry to restore that expression to the calculator. Use "Clear All" to wipe the history. Up to 200 entries are retained.

Type numbers and operators directly. Enter or = evaluates the expression. Escape clears everything. Backspace deletes the last character. All numpad keys work (0–9, /, *, -, +, ., Enter). Parentheses can be typed directly with ( and ). ^ is used for powers.

Toggle between DEG and RAD modes using the button in the scientific functions panel. In DEG mode, sin(90) = 1. In RAD mode, sin(π/2) = 1. The current mode is always visible in the display area and on the toggle button.

When you have unclosed parentheses in your expression, an orange badge appears in the top-right of the display showing how many are open. For example "( 2" means 2 more closing parentheses are needed. This helps you avoid "unexpected end of expression" errors.