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What Are the Standard Dimensions of a 20ft Shipping Container?

A standard 20ft shipping container follows international ISO specifications, meaning its dimensions are consistent worldwide. These standardized measurements allow the container to be transported safely by ship, rail, and truck.

Answer reviewed November 2, 2026

External Dimensions (Outside Measurements)

  • Length: 20 feet (6.06 meters)
  • Width: 8 feet (2.44 meters)
  • Height: 8 feet 6 inches (2.59 meters)

These external dimensions are critical for transportation, stacking, and placement planning.

Internal Dimensions (Usable Space)

  • Length: approximately 19 feet 4 inches (5.90 meters)
  • Width: approximately 7 feet 8 inches (2.35 meters)
  • Height: approximately 7 feet 10 inches (2.39 meters)

Interior measurements are slightly smaller than exterior dimensions due to the thickness of the steel walls, doors, and flooring.

Door Opening Dimensions

  • Width: approximately 7 feet 8 inches (2.34 meters)
  • Height: approximately 7 feet 5 inches (2.28 meters)

Door clearance is an important consideration when loading equipment, pallets, or oversized items.

Weight and Capacity

  • Tare Weight (Empty): ~4,850 lbs (2,200 kg)
  • Maximum Payload: ~47,900 lbs (21,700 kg)
  • Maximum Gross Weight: ~52,800 lbs (24,000 kg)

Total Interior Volume

A standard 20ft container provides approximately 1,170 cubic feet of usable interior space, making it ideal for storage, shipping, and modification projects.

Why These Dimensions Matter

Knowing the exact dimensions of a 20ft container helps ensure proper delivery access, placement planning, and compatibility with the intended use-whether for storage, transportation, or conversion into offices or workspaces.

Bottom Line

A standard 20ft shipping container measures 20 ft long x 8 ft wide x 8 ft 6 in high externally, with slightly reduced interior dimensions due to construction materials.

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