USPS Cubic Pricing

USPS Cubic Pricing offers discounted rates to its high volume shipping customers that ship heavy and small packages. In order to be classified as high volume customer and hence be eligible for cubic pricing, customers must ship over 50,000 packages a year. Moreover, you qualify for Cubic Pricing if you meet the minimum package requirements: USPS Priority Mail packages must measure at most 0.5 cubic feet and weigh less than 20 pounds. Instead of paying for its package weight, in cubic pricing customers pay shipping costs for shipping distance and package size. Therefore, USPS Cubic Pricing is an effective alternative, to lower your shipping costs, over large shipping carriers such as FedEx, UPS and DHL that only offer pricing based on distance and weight.

A guide to how USPS Cubic Pricing works

The cubic pricing for your USPS package is measured by calculating:

Length x Width x Height / 1728 = Cubic Feet

Once you have the cubic feet measurement, your package will fall into one of the following five tiers:

  • Tier 1: Packages up to 0.10 cubic feet
  • Tier 2: Packages more than 0.10 and up to 0.20 cubic feet
  • Tier 3: Packages more than 0.20 and up to 0.30 cubic feet
  • Tier 4: Packages more than 0.30 and up to 0.40 cubic feet
  • Tier 5: Packages more than 0.40 and up to 0.50 cubic feet


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