How do you determine the shipping cost on a large package?

Use tools provided at USPS.com to determine the cost of shipping a large package. To accurately calculate rates, it is necessary to know the size and weight of the package, as well as the zip codes of the locations the package is being shipped from, as well as its destination.

The cost of shipping a large package may vary depending on the shipping speed chosen. For example, packages shipped via First Class Mail generally cost less than those shipped via Priority Mail, but arrive more slowly. Other factors that can affect the cost of shipping a large package include the value of the item being shipped and whether the package contains sensitive or hazardous materials.