Basic Calculator
Free online math calculator. Adds, subtracts, multiplies and divides numbers, works with brackets and decimals.
You can use the keyboard: digits, + − * /, Enter for equals, Backspace to erase, Esc to clear.
The basic online calculator adds, subtracts, multiplies and divides numbers, including decimals.
How to use the calculator
- Enter the first number with the buttons or the keyboard.
- Press an operation: +, -, * or ÷.
- Enter the second number and press =.
The C button clears everything, the <- button erases the last digit. On the keyboard you can use digits, operation signs, Enter (equals), Backspace and Esc.
Example
7 * 6 = 42
0.1 + 0.2 = 0.3
The calculator works with high precision, so 0.1 + 0.2 gives exactly 0.3, without the rounding errors common in ordinary computer arithmetic.