# Volumetric weight

The volumetric weight of a shipment represents the amount of space it takes up in an aircraft/vehicle. Some carriers use volumetric weight to determine the cost for a shipment, while others use only the gross weight. Carriers that do use volumetric weight to calculate the cost of a shipment will take the higher value between the gross weight and the volumetric weight to determine the billable weight (or chargeable weight). Some of the carriers integrated in the MyParcel.com API consider volumetric weight (also known as dimensional weight) when determining the cost of a shipment.

### Formula

The formula to calculate the volumetric weight of a shipment depends on the preferred dimension units. When using `mm` as the unit for dimensions, calculating the volume by multiplying the dimensions and then dividing that by 5.000.000 will give the volumetric weight in kilograms:

When using `cm` as the unit for shipment dimensions, the factor to divide the volume by becomes 5000: