The Multiplication Sign (×): Meaning, History, and Usage
The Multiplication Sign (×) is a standard mathematical symbol used to denote the operation of multiplication, representing the process of calculating the product of two or more numbers. English mathematician William Oughtred first introduced this symbol in 1631. While everyday internet users frequently substitute it with the lowercase letter "x," the true multiplication sign is a distinct, perfectly symmetrical cross designed specifically for mathematical typography.
In the Unicode standard, the Multiplication Sign is assigned the code point U+00D7 and resides within the Latin-1 Supplement block. Because it is a fundamental mathematical character, it enjoys broad support across almost all fonts, digital platforms, and operating systems.
Beyond basic arithmetic, the × symbol serves multiple roles across different fields. In science and engineering, it denotes dimensions, such as a screen resolution of 1920 × 1080 pixels or the physical size of an object. Biologists use it to indicate hybrid crosses in genetics. On social media and in pop culture, the symbol has found a stylized second life representing collaborations—like a limited-edition sneaker release reading "Brand A × Brand B"—or romantic pairings in internet fandom culture. In web design, developers often use the HTML entity `×` to create crisp, symmetrical "close" buttons for pop-up windows.
Typing the exact Multiplication Sign requires specific shortcuts depending on your device. On Windows, hold the Alt key and type 0215 on the numeric keypad. Mac users can easily insert it by pressing Command + Control + Space to open the Character Viewer and searching for "multiply". Web developers rely on the HTML entity `×` or `×` to generate the symbol seamlessly. On most mobile keyboards, you can find × by switching to the numbers and math symbols layout.
It is easy to confuse the Multiplication Sign with visually similar characters. The lowercase letter "x" (U+0078) is the most common stand-in, but it sits lower on the text line and lacks the exact geometric symmetry of ×. In computer programming, the asterisk * (U+002A) serves as the universal operator for multiplication, since the × symbol is absent from standard QWERTY keyboards. Additionally, mathematicians often prefer the Middle Dot · (U+00B7) for multiplication in algebra to avoid any visual confusion with the variable x. For casual messaging, the Heavy Multiplication X (✖️) serves as the colorful emoji equivalent.