15inch

15inch, typically written as 15-inch, is a unit of length in the imperial system equal to 15 inches, or 1.25 feet, which is exactly 38.1 centimeters.

Although it is a simple measure of distance, 15 inches is commonly used to describe the diagonal size of objects, especially screens. In consumer electronics, a 15-inch display refers to a roughly 15-inch diagonal viewing area, with the actual screen size affected by the aspect ratio and bezel. The category sits between smaller portable displays and larger monitors, and 15-inch laptops are a traditional compromise between portability and screen real estate.

Beyond displays, 15 inches is also used for other diameters in objects such as wheels and loudspeakers. A 15-inch wheel or a 15-inch woofer describes the nominal diameter of the circular component, which influences fit, mounting, and acoustic or performance characteristics.

Standardization: the inch is defined as exactly 25.4 millimeters. Therefore, 15 inches equals 381 millimeters (38.1 cm). The term is often hyphenated when used adjectively (15-inch) in product specifications and descriptions.

Origin and usage notes: the inch derives from ancient measurement systems and has been standardized in modern metric terms for precision in manufacturing and commerce. The label 15-inch is most commonly encountered in electronics, automotive components, and audio equipment, where it serves as a concise descriptor of size.