各位外贸朋友们，有没有发现，寄国际快递，有时实重、体积重都不一样，那怎么计费呢？

拿国际快递UPS举例，计费方案是：

根据UPS2014年新规定，重量收费按每件货物实际重量与体积重量相比，取较重者计算收取，之后将每件重量相加后进位得出计费重量。

例如一票三件货，

每件货分别实重是10.2KG,20.3KG,30.4KG，

对应的材积为8.2KG，15.1KG，40.5KG，

按照旧规定计费重量为：8.2+15.1+40.5=63.8KG，

而新规定为：10.5+20.5+41=72KG

如何给国外客户解释体积重呢？
英文描述可以参考：

Volumetric weight, also known as Dimensional weight is used to used by postal companies and other freight industries and courier services around the world to invoice for the actual space that a parcel, package or pallet takes up in a vehicle or storage area. A vehicle can quickly become full of bulky, lightweight articles long before it reaches its capacity in weight which makes for inefficient use of space.

UPS the courier’s answer:
The volumetric weight of a shipment is a calculation that reflects the density of a package. A less dense item generally occupies more volume of space, in comparison to its actual weight. The volumetric or dimensional weight is calculated and compared with the actual weight of the shipment to ascertain which is greater; the higher weight is used to calculate the shipment cost.

官网也有给出一些参考：

Learn About Dimensional Weight
Determining which weight to use in calculating your rate requires that you determine which rule applies. Dimensional weight reflects package density, which is the amount of space a package occupies in relation to its actual weight. Dimensional weight may apply to all UPS domestic and international services. Billable weight is the weight used to calculate the rate. For domestic and international services, the billable weight will be the greater of the dimensional weight as compared to actual weight. Calculations of dimensional weight are subject to change without notice.

Packages that exceed UPS weight and size limits are not accepted for transportation. If found in the UPS system, they are subject to an Over Maximum Limits charge.

How To Measure the Cubic Size of Your Package
Calculate the cubic size of your package in centimetres by multiplying the height by the length by the width. Round each measurement to the nearest whole centimetre. The resulting total is the cubic size of your package.

How To Calculate Dimensional Weight
You can calculate the dimensional weight as the billable weight when the dimensional weight of your package exceeds its actual weight.

Determine Actual Weight: Use any standard scale to determine the actual weight of your package. Increase any fraction to the next half kilogram.

Determine Dimensional Weight: Divide the cubic size of your package in centimetres by 5,000. Increase any fraction to the next half kilogram.

Determine Billable Weight: Compare the package’s actual weight to its dimensional weight. The larger of the two weights is the billable weight and should be used to calculate the rate.

For multiple-package shipments, total the billable weight of all packages in the shipment.

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