How to use the Calculator

Click the buttons or use your keyboard to enter numbers and operators. Press Enter or = to calculate, Escape to clear, and Backspace to delete the last character.

Keyboard shortcuts

Key	Action
`0`-`9`	Enter digits
`+` `-` `*` `/`	Arithmetic operators
`.` or `,`	Decimal point
`Enter` or `=`	Calculate result
`Escape`	Clear all (AC)
`Backspace`	Delete last character
`%`	Percentage

How percentage works

The % key divides the current value by 100. When used in an expression like 200 + 15%, it calculates 15% of 200 (= 30) and adds it to 200, giving 230. This matches the behavior of most pocket calculators.

Order of operations

This calculator evaluates expressions from left to right as you chain operations, it does not apply algebraic operator precedence (BODMAS/PEMDAS). To calculate 2 + 3 × 4 with correct multiplication priority, calculate 3 × 4 first, then add 2 to the result.