Enter a number, then tap % to convert it to a decimal (e.g., 50 → 0.5). For percentage of a number, enter the base, tap ×, enter the percentage, tap %, then =. Example: 200 × 50% = 100.
Yes! Use number keys (0-9), operators (+, -, *, /), Enter or = for equals, Backspace to delete, Escape to clear, and . for decimal point.
The ± button toggles the sign of the current number between positive and negative. For example, tapping ± on 42 gives -42, and tapping it again returns to 42.
Every completed calculation is saved to the history panel on the right. Click any history item to load that result back into the calculator. History is stored locally in your browser and persists until you clear it.