20foot

20foot is a term used to denote a length of twenty feet. In most English-speaking contexts, a foot is defined as 0.3048 meters, so twenty feet equals 6.096 meters, or 240 inches. The measure is common in construction, architecture, and transportation to specify dimensions and clearances.

In logistics, the phrase often appears as part of the term "20-foot container" or TEU—twenty-foot equivalent unit—a standard intermodal freight container used worldwide. A typical 20-foot container has external dimensions of about 6.096 meters in length, 2.438 meters in width, and 2.591 meters in height, with internal dimensions reduced by wall thickness. Containers are standardized by the ISO 668 specification and are designed to be handled by cranes, ships, trucks, and railcars, enabling efficient movement of goods across modes. The TEU framework allows capacity to be described in multiples of 20-foot units.

Beyond shipping, 20-foot measurements appear in building and design contexts to describe spaces, equipment baselines, or cable runs, where a 20-foot span provides a convenient, modular unit.

Related topics include the twenty-foot equivalent unit (TEU) and ISO 668 container size standards.