What are the internal dimensions of a 20 foot container and what is its cubic space?

The dimensions of a 20-foot container are:

External Dimensions

Length: 20 feet

Height: 8 feet 6 inches

Width: 8 feet

Internal Dimensions

Length: 19 feet 5 1/2 inches

Height: 7 feet 9 7/8 inches

Width: 7 feet 8 inches

Cubic Capacity: 1,173 cubic feet