Container Loading Guide: How Many Pallets Fit in a 20ft & 40ft Container?

The standard numbers: a 20ft container holds 10–11 pallets, a 40ft GP holds 20–21 pallets, and a 40ft High Cube holds 20–21 pallets floor-loaded but significantly more double-stacked. But those numbers shift based on pallet size, cargo height, and how well you plan the load.

Container Interior Dimensions (ISO 668 Verified)

These are the usable interior dimensions — not the exterior. The difference matters when calculating how many pallets fit.

Key width note: The 92-inch interior width is narrower than a US dry van trailer (99 inches). Two standard 48×40 GMA pallets placed with the 48" side across = 96 inches — which exceeds the 92-inch container width by 4 inches. This is why standard GMA pallets don't fit two-across in a container. The workaround is using Euro pallets (47×31") or turning 48×40 pallets so the 40" side faces across (two 40" = 80" — fits with 12" clearance).

Pallet Count by Container Type

20ft vs 40ft Container — Which Do You Need?

The decision usually comes down to volume, weight, and cost per CBM:

Rule of thumb: If your cargo is over 15 CBM but under 33 CBM, a 20ft container is usually the right call. Over 33 CBM, move to a 40ft. If your cargo is light and bulky (low density), the 40ft HC almost always gives better cost per CBM than the 40ft GP despite the slight rate premium.

What is Container Utilisation — and Why It Matters

Container utilisation is the percentage of the container's usable volume your cargo actually fills. The industry target is 85% or higher. Below 70% you're paying for space you're not using.

Container Loading Plan — What It Is and When You Need One

A container loading plan (also called a stuffing plan or container load plan) is a diagram and document showing how cargo is arranged inside a container. It typically includes:

• Cargo dimensions, weight, and quantity per SKU
• Stacking order — heaviest items on the bottom
• Weight distribution — balanced front-to-back and side-to-side
• Void fill and dunnage placement
• Tie-down and lashing points for heavy items

Most freight forwarders require a loading plan for FCL shipments over 15,000 kg, mixed cargo types, or any shipment with hazmat. Even when not required, a loading plan reduces damage claims and port delays from unstable loads.

Container Loading Best Practices

1. Weight distribution first

Heavy cargo goes on the bottom and distributed evenly front to back. Uneven weight distribution causes containers to rock during sea transit, leading to cargo damage and potentially a failed port inspection. Target: no more than 60% of weight in the front half of the container.

2. Maximise vertical space

The single biggest source of wasted utilisation is unused vertical space. A 40ft HC's 110-inch interior height allows two layers of standard 48-inch pallets (96 inches total + pallet boards) with just enough clearance. If you're using a 40ft GP and your pallets are under 45 inches, double-stacking often fits.

3. Fill gaps systematically

After placing full pallets, fill remaining gaps with smaller cartons or void fill. Our container planner uses a gap-filling algorithm that automatically finds and fills empty container space — calculating final utilisation before you load.

4. Secure the load

All cargo must be secured against movement during transit. Strapping, airbags, dunnage bags, and corner boards are standard. An unsecured load that shifts at sea can damage cargo and delay delivery at port if customs inspection finds an unstable container.

5. Document before sealing

Photograph the loaded container before the doors are sealed — full interior shot showing cargo arrangement. This is your proof if a damage claim is filed at destination. Date-stamp the photos and tie them to the container number and booking reference.