From time to time it is necessary to calculate the volumetric weight of a package as the cost can be affected by the amount of space it occupies in transit. We also use this formula to calculate sending parcels worldwide. If the volumetric weight exceeds the dead weight of the package then we will charge the greater weight. The industry standard conversion formula is: Length (cms) x width (cms) x height (cms) divided by 4500 as shown in the example diagram below.