20ft vs 40ft Shipping Container: Which Size Wins?

The 20 vs 40 question has a clean answer once you look at three things: cost per square foot, delivery access, and what you’re actually storing. Let’s settle it.

The numbers

A 20ft gives you ~160 sq ft / 1,172 cu ft; a 40ft doubles that (~320 sq ft / 2,390 cu ft) for typically 40–60% more money — not double. On pure cost per cubic foot, the 40ft wins every time. Full specs in the dimensions guide.

Where the 20ft wins

• Access: needs ~60ft of straight run vs ~100ft for a 40ft — the deciding factor on residential lots.
• Placement flexibility: fits where a car parks; easier to screen from view.
• Relocation: cheaper and easier to move later.
• Weight spread: lighter footprint on marginal ground.

Where the 40ft wins

• Value: the cheapest space you can buy per cubic foot.
• Business storage: pallets, equipment, inventory — one 40ft beats two 20fts on price and walls.
• Conversions: offices and workshops want the length; high-cube 40s are the conversion standard.

The practical answer

Homeowners on normal lots: 20ft, almost always — access decides it. Farms, yards, businesses with room: 40ft for the economics. Genuinely torn? Measure your straight-line access first; the site usually answers before the budget does.