Enter numbers and operators just like a physical calculator — tap the digits and operator buttons, or type on your keyboard, and press equals (or Enter) to get your result. Every calculation is kept in a short "Recent" history for the current visit.
This calculator works left to right, in the order you press the buttons — the same way a simple physical calculator works, not full mathematical operator precedence (PEMDAS/BODMAS). For example, 2 + 3 × 4 is calculated as (2 + 3) × 4 = 20, not 2 + (3 × 4) = 14. For expressions where operator precedence matters, use the scientific calculator instead.
The percent button divides the number currently on the display by 100 — for example, entering 50 and pressing % gives 0.5. Combine it with an operator to work out a percentage of a value: entering 200 − 10 % reduces 200 by 10%.
The number keys, +, -, * and / work as expected. Press Enter or = to calculate, Backspace to delete the last digit, Escape to clear, and % for percent.
This is a simple four-function calculator — it doesn't support brackets, memory functions, or operator precedence. The "Recent" history holds your last five calculations for this visit only and isn't saved once you close or refresh the page.