The United States Postal Service (USPS) is an independent agency of the United States government responsible for providing postal service in the United States.
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How to calculate volumetric weight of Parcels :
Calculate Parcel Length x Breadth x Depth in Centimeters and divide it by 6000
(Note: Some Courier Companies have currently started dividing by 5000.)
Calculate Parcel Length x Breadth x Depth in inches and divide it by 366 .