Use this basic calculator to quickly perform simple arithmetic operations such as addition, subtraction, multiplication, and division — all directly in your web browser. It looks and functions just like a handheld calculator, making it ideal for fast math calculations at home, school, or work.

Built with JavaScript, HTML, and CSS, this calculator runs entirely in your browser. No data is sent to a server, so your calculations are processed locally and instantly for a smooth, private experience.

You can use your mouse, keyboard, number pad, or touch screen to enter values. The calculator includes buttons for digits 0–9, operators (+, –, ×, ÷), and keys for square root, percentage, and plus/minus (±). The AC/CE key automatically switches between clearing all or just your current entry — helping you correct mistakes easily.

Check out the full Basic Calculator page for more information on how to use this calculator.