A standard 20-foot shipping container weighs about 4,850 pounds (2,200 kg) empty. That’s the tare weight, meaning just the container itself with nothing inside. Depending on the container type and what it’s built from, that number can shift by several hundred pounds in either direction.
Empty Weight by Container Type
Not all 20-foot containers are built the same way. A standard dry container, the kind you see stacked on cargo ships and flatbed trucks, has an empty weight that falls between 4,500 and 5,000 pounds (2,050 to 2,300 kg). The variation comes down to the manufacturer, the age of the container, and the specific materials used in its construction.
High cube containers are one foot taller than the standard version (9’6″ instead of 8’6″), which adds steel and weight. A 20-foot high cube typically weighs around 5,100 pounds (2,313 kg) empty.
Refrigerated containers, called reefers, are the heaviest of the bunch. The insulation and built-in cooling machinery push the empty weight to roughly 6,800 pounds (3,080 kg). That’s nearly 2,000 pounds more than a standard dry container, which matters if you’re calculating how much cargo you can actually load.
Steel vs. Aluminum Construction
Most shipping containers are made from Corten steel, a type of weathering steel designed to resist corrosion. A standard 20-foot steel container has a tare weight of about 4,850 pounds. Aluminum versions of the same size weigh around 4,189 pounds, saving you roughly 660 pounds. That weight savings translates directly into extra payload capacity, which is why aluminum containers are sometimes preferred for heavy cargo that pushes up against weight limits.
Maximum Loaded Weight
The maximum gross weight for a 20-foot container, meaning tare weight plus cargo, is around 67,200 pounds (30,480 kg). Subtract the container’s own weight and you get a payload capacity of up to 62,170 pounds (28,230 kg). That’s the theoretical maximum based on the container’s structural rating.
In practice, you’ll rarely load a 20-foot container to its full structural capacity because road weight limits will stop you first.
Road Weight Limits for Transport
The federal gross vehicle weight limit on U.S. highways is 80,000 pounds. That total includes the truck, the chassis, and the loaded container. A typical tractor and chassis combination weighs somewhere around 30,000 to 35,000 pounds on its own, which means your loaded container usually can’t exceed about 44,000 to 48,000 pounds without going over the federal cap.
As a practical guideline, the recommended maximum cargo weight for a 20-foot dry container moving by road in the U.S. is around 39,500 pounds (about 17.9 metric tons). For a 20-foot reefer, that drops to about 36,500 pounds because the heavier container eats into the available weight budget. Some states allow overweight permits that raise the gross vehicle weight ceiling to 88,000 or even 105,000 pounds, but those require advance paperwork and additional fees.
There’s also a federal certification requirement: any container moving by truck on U.S. highways with more than 29,000 pounds of gross cargo weight must have a weight certification that includes the commodity, container number, and gross cargo weight including pallets and packaging. This certification has to be provided to the carrier before the load is tendered for transport.
Why the Weight Matters
If you’re buying a shipping container for storage, the empty weight tells you what kind of equipment you need to deliver and place it. A 4,850-pound steel box requires a crane, a tilt-bed truck, or a forklift rated for at least 2.5 tons. You’ll also want to confirm your property can handle the weight. Soft ground, older concrete pads, or elevated surfaces may need reinforcement.
If you’re shipping cargo, the relationship between the container’s tare weight, the structural payload limit, and the road weight limit determines how much you can actually load. The structural limit is generous at over 62,000 pounds, but road regulations will almost always be the binding constraint, capping practical cargo weight closer to 39,500 pounds for a standard 20-foot dry container on U.S. highways.