About the basic calculator
This basic calculator handles addition, subtraction, multiplication, and division. You can type a full expression (e.g. 115+200, 50×12−30, or 150+200+63−85×89) and press = or Enter to evaluate. The display keeps the expression visible so you can check it; the result replaces the display after equals. Multiplication and division are applied before addition and subtraction, so 2+3×4 equals 14. Use C to clear and start over. The ± button flips the sign of the last number; the % button divides the last number by 100, useful for percentages and discounts.
The calculator runs in your browser—no sign-up or download. It works on phones, tablets, and desktops; the keypad is touch-friendly and the layout stacks on small screens. You can use the keyboard for speed: number keys, +, -, *, /, Enter for equals, Escape or C to clear, and Backspace to remove the last character. Use it for shopping, tips, budgets, or quick homework. For exponents, roots, or trigonometry, try the scientific calculator on this site.