Dimensional Shipping Weight Calculator

Enter the package dimensions and carrier to calculate the dimensional shipping weight and package volume & girth.

Dimensional Shipping Weight:

Package Girth
Package Size (Length + Girth)
Package Volume
cu in
cu cm
cu ft
cu m
Learn how we calculated this below

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How to Calculate Dimensional Shipping Weight

Dimensional weight is a measure of package density and is used to calculate the price of shipping. Dimensional weight is essentially a measure of how much space a package will take up during transport.[1]

To calculate dimensional shipping weight, use the following formula.

dimensional weight = cubic inches / dim divisor

Thus, the dimensional shipping weight in pounds is equal to the package volume in cubic inches divided by the dim divisor. The dim divisor varies by carrier and shipping class, but is often 166 for USPS[2] or 139 for UPS[3] and Fedex[4].

The volume of a package in cubic inches can be found by measuring the length in inches by the width in inches by the height in inches.

volume = length × width × height

For example, let’s find the dimensional shipping weight of a package that is 24″ x 16″ x 12″ for UPS shipping.

volume = 24″ × 16″ × 12″
volume = 4608 cu in

dimensional weight = 4608 cu in / 139
dimensional weight = 33.15 lbs

So, the dimensional weight of this package is 33.15 pounds when shipping via UPS.

You might also find our freight class calculator useful for estimating the class of your cargo.


  1. Katie Wild, How to calculate dimensional weight, https://www.ingrammicroservices.com/blog/calculate-dimensional-weight/
  2. United States Postal Service, Global Express Guaranteed® Service Guide, https://about.usps.com/publications/pub141.pdf
  3. United Parcel Service, 2022 UPS Rate & Service Guide - Retail Rates, https://www.ups.com/assets/resources/webcontent/en_US/retail_rates.pdf
  4. Fedex, What is Dimensional Weight?, https://www.fedex.com/en-us/shipping/packaging/what-is-dimensional-weight.html