Calculating international ocean freight rates requires a comprehensive consideration of the cargo type (full container load (FCL) / less than container load (LCL), shipping terms (such as FOB, CIF), and the actual service content. While there’s no single, fixed formula, the core logic and cost components are clearly categorized.
In this article, Weefreight will break down the calculation method and cost structure, hoping it will be helpful.
From a calculation perspective, there are significant differences between full container load (FCL) and less than container load (LCL). Full container loads are usually charged on a “container unit” basis, meaning shipping companies set a fixed “container fee” based on the route and container size (e.g., 20-foot container, 40-foot container) (e.g., the freight for a 20GP container on a certain route is US$1,500 per container). The fee has nothing to do with the actual weight or volume of the cargo in the container. You only need to ensure that the cargo does not exceed the container’s load limit (e.g., a 20GP container usually has a weight limit of 21-28 tons, depending on the shipping company’s regulations). LCL freight is charged based on the greater of the weight or volume of the cargo. The industry standard is that one cubic meter (CBM) of cargo is equivalent to one ton. If the actual weight (ton) of the cargo is greater than the volume (CBM), it is charged based on the weight ton (W); if the volume is greater than the weight, it is charged based on the volume ton (M). Some cargo with unusual density (such as machinery parts and metal products) may be charged based on the higher of the weight or volume ton (W/M). Freight rates are calculated in US dollars per ton or US dollars per CBM. The exact weight and volume (length × width × height, all in meters) of the cargo must be determined before calculation.
International ocean freight is not a single fee, but consists of two major components: the “base freight” and the “surcharge.” In some cases, “other service charges” may also be included. The basic freight rate is the core fee charged by shipping companies for completing the sea transport of goods and serves as the basis for freight calculation. The amount is determined by the route, cargo type, and mode of transport (FCL/LCL). For example, the basic freight rate for a 20GP full container load (FCL) from Shanghai, China to Los Angeles, USA, or the basic freight rate for a 1CBM general cargo load (LCL) is determined by shipping companies based on factors such as market supply and demand, fuel costs, and route distance.
Surcharges are additional fees incurred due to special transportation needs, external cost fluctuations or regulatory requirements. There are many types and the most common ones are as follows: First, the bunker surcharge (BAF), which is adjusted due to fluctuations in international oil prices. When oil prices rise, shipping companies will charge an additional fee, which is directly reflected in the freight rate; second, the currency depreciation surcharge (CAF), which is charged to offset the exchange rate risk when the exchange rate of the settlement currency (usually the US dollar) fluctuates significantly; third, the peak season surcharge (PSS), which is charged by shipping companies during the peak freight season (such as before and after holidays, and after e-commerce promotions) due to tight shipping space; fourth, the port surcharge (THC), which includes the terminal handling fee at the port of departure and the terminal handling fee at the port of destination, which is used to cover the service costs of loading and unloading, storage, tallying, etc. at the terminal. The THC standards for different ports are different; fifth, the overlength/overweight surcharge, which is incurred if the length of a single piece of cargo exceeds the container limit (such as more than 6 meters) or the weight of a single piece exceeds the terminal lifting limit (such as more than 10 tons), and special loading and unloading equipment is required; sixth, the dangerous goods surcharge (DG Dangerous goods transportation requires special shipping space, packaging inspections, and safety supervision, which shipping companies will charge additional fees for. These fees vary depending on the dangerous goods class (e.g., Class 3 flammable liquids, Class 9 miscellaneous dangerous goods).
In addition, other service fees may apply. For example, when goods need to be transported from the factory to the port of departure, there will be a towing fee; if goods need to be temporarily stored in a warehouse at the port of departure, there will be a storage fee; when LCL cargo is separated and consolidated at the warehouse, there will be a CFS charge; when customs declaration and inspection procedures are handled, there will be customs and inspection fees; and if the shipper entrusts a freight forwarder (freight forwarder) to handle the entire transportation process, there will also be a freight forwarding service fee (usually included in the overall quote to cover the freight forwarder’s communication, coordination, document processing, and other costs).
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