What is the standard length of a 40-foot container in meters?

The standard external length of a 40-foot container is 12.192 meters.

That figure is the metric conversion of 40 international feet: 40 × 0.3048 meters equals 12.192 meters. It describes the nominal outside length of the standardized container, not the usable interior space. A typical 40-foot general-purpose container is also about 2.438 meters wide and 2.591 meters high externally.

The word “standard” matters because container types vary. A 40-foot high-cube container keeps the same 12.192-meter length but is taller, normally about 2.896 meters externally. Refrigerated containers, open-top units, and other specialized designs can also have different internal dimensions or equipment clearances.

A common mix-up is rounding 12.192 meters to 12 meters or 12.2 meters. Those approximations may be adequate for casual conversation, but engineering, shipping, and capacity calculations use the precise nominal conversion. The internal floor length is shorter because the steel walls, doors, and corner structures consume space. In container logistics, a 40-foot unit is commonly counted as two TEUs, or twenty-foot equivalent units.