They rely on cubic meters to calculate the size or weight of the shipment. Then simply multiply the 3 measurements together using the formula Volume Length Width Height. Finally add the units cubed.
Substitute numbers into a formula for the volume.
To calculate the volume of a rectangular box first measure its length width and height. The formula is then volumebox width x length x height. Recall that a box is also called rectangular prism. By designating one dimension as the rectangular prisms depth or height the multiplication fo the other two gives us the surface area which then needs to be multiplied by the depth height to get the volume.