Basic Calculator
A local calculator for arithmetic, decimals, percent, backspace and history
Usage
Use the calculator buttons or your keyboard for digits, decimals, arithmetic operators, percent, Enter, Backspace and Escape. You can also paste copied numbers or simple expressions, such as 123, 1,234.56, 1+2 or 7×6=. The calculator converts pasted text into calculator input and uses it in the current calculation. After a calculation, copy a result from history or reuse it for the next calculation.
FAQ
- 1.
Why does 0.1 + 0.2 show 0.3?
The calculator uses decimal string arithmetic instead of raw JavaScript floating-point addition.
- 2.
Can I paste copied numbers or expressions?
Yes. You can paste a single number, a number with thousands separators, or a simple expression such as 1+2 or 7×6=. Parentheses and scientific functions are not supported in this basic calculator.
- 3.
What happens when dividing by zero?
The calculator shows a recoverable error and does not add a failed result to history. Press AC to reset or Backspace to edit.