DTDC calculates the weight of a package based on its actual weight or volumetric weight, whichever is higher. Volumetric weight is calculated by multiplying the length, width, and height of the package in centimeters and dividing the result by a volumetric factor of 5000. The volumetric weight is then rounded up to the nearest whole number. This method of weight calculation is used to ensure that the shipping charges are fair and accurate, as packages with a large size but low actual weight can take up a significant amount of space on the delivery vehicle and incur higher handling and fuel costs.