How to use
Tap the keys or type straight from your keyboard. Enter numbers with + - * /, brackets and %, then press Enter or =. Backspace deletes one character and Esc clears everything.
The large number updates as you type, so you can see the running result before finishing the expression.
Order of operations
Multiplication and division come before addition and subtraction, and anything in brackets is worked out first. 2+3×4 is 14, while (2+3)×4 is 20.
The % key
A number followed by % is divided by 100, so 50000×15% gives 7,500. For "what percent is A of B" or percentage change, the percentage calculator is quicker. Need sin, log or powers? Use the scientific calculator.