The calculation of sea freight is usually based on the weight of the goods; according to the size or volume of the goods; according to the weight or size of the goods, choose the one that charges the higher freight to calculate the freight; now the third is more common, the specific calculation method is: A FCL: FCL The freight is divided into three parts, the total freight = the sum of the three parts. 1. Basic Freight Basic Freight = Unit Basic Freight × FCL 2. Port Surcharge Port Surcharge = Unit Port Surcharge × FCL 3. Fuel Surcharge Fuel Surcharge = Unit Fuel Surcharge × FCL B Box loading: LCL freight only basic freight, divided by volume and weight two ways 1. According to volume calculation, X1 = unit basic freight (MTQ) × total volume 2. According to weight, X2 = unit basic freight (TNE) × total gross weight takes the larger of X1 and X2