Dense goods such as wheat, rice, sorghum, millets and most pulses usually fill a 20 ft container by weight, not by space. In a typical case that means somewhere in the low to mid 20s of tonnes, but the exact figure depends on the shipping line, road limits and the pack.
Always ask the supplier for their last actual loading of the same product and pack. That figure beats any rule of thumb.
Why weight decides
Grain is heavy for its volume. A 20 ft container fills with bagged grain before it is full to the roof, or close to it. The limits that cap the load are the container's own rated payload, the shipping line's weight rules for that route and the road weight limits in India and at your end.
The container may also be lifted onto a truck and driven inland. If your final delivery is by road, local axle limits can be lower than what the sea leg allows. Check with your freight forwarder.
Overloading is a real risk, not a paperwork detail. Shipping lines need a verified gross mass for every container, and an overweight box can be held at the port, reloaded or fined. Agree a safe target weight with the supplier rather than asking for the maximum.
What changes the number
- Product density: small, round, dense seeds pack tighter than large or irregular ones.
- Bag size: 50 kg bags and 25 kg bags stack differently, and small consumer packs in cartons take more space.
- Pallets: palletised loads lose space and weight to the pallets themselves.
- Bulk liner bags: filling loose grain into a liner can use the space more fully.
- Shipping line rules: some lines cap 20 ft containers lower on certain routes or ports.
- Destination road rules: lower limits inland can force a lighter load.
20 ft or 40 ft
For dense grain, a 40 ft container does not carry double the weight of a 20 ft. Both reach a weight cap, and the 40 ft cap is not much higher. So heavy grain usually ships in 20 ft containers, while lighter products such as flakes or puffs may suit a 40 ft.
The general picture for different agri products is in how much product fits in a 20 ft and a 40 ft container. For oilseeds, compare how many tonnes of peanuts or sesame fit in a container.
Before you book
- Ask for the supplier's last actual loading of this product, pack and container size.
- Confirm the maximum gross weight your shipping line accepts on the route.
- Check road limits at your end with your forwarder.
- State the agreed quantity per container and the tolerance in the contract.
- Ask for a weighbridge slip from loading.
How we help
We confirm the planned load with the processor before booking and watch the actual loading, including bag count and weighbridge records. For help planning your quantities, ask for a free sourcing review.