Math Calculator

Click the number and operator buttons, or type digits, +, -, *, /, and Enter directly on your keyboard. AC clears everything, and ⌫ removes the last digit only.

Yes. The √ button calculates the square root, x² squares the number, and 1/x gives the reciprocal. For example, entering 9 and pressing √ returns 3.

An impossible calculation like dividing by zero shows Error on the screen. Press AC to reset and enter your numbers again.

Yes. The expression you've entered so far (e.g. 12 + 5 =) appears above the result, so you can always see what's being calculated.

No. All calculations happen entirely in your browser and are never sent to or stored on a server.

Standard arithmetic and decimal calculations work fine, but due to JavaScript's floating-point behavior, very long decimals can show tiny rounding errors. For precision engineering or accounting work, pair this with a dedicated tool.