4x3

4x3, commonly written as 4:3, denotes an aspect ratio in which the width is four units and the height is three units. It is equivalent to 1.333:1 and is used to describe the proportions of an image, display, or film frame.

In video and display technology, 4:3 was the standard aspect ratio for analog television and early computer displays from the 1950s through the early 2000s. Common resolutions include 640x480 (VGA), 800x600 (SVGA), 1024x768 (XGA), and 1280x960. With the rise of widescreen formats, 16:9 became dominant, but 4:3 remains in use for standard-definition content, retro gaming, medical displays, and some projectors.

In photography and digital imaging, 4:3 is a common sensor and image format, especially on Micro Four Thirds cameras, as well as some DSLR sensors and compact cameras. The ratio yields a slightly taller frame compared with 16:9, which influences composition and framing in certain genres.

History and usage notes: The 4:3 ratio originated with early cinema and television standards and was widely adopted in the mid-20th century. It was gradually supplanted by widescreen formats with the advent of high-definition television and flat-panel displays, though it remains prevalent in various legacy and specialty contexts.

Other uses: In mathematics, 4×3 denotes the product of 4 and 3, equal to 12.