Compare the dimensional weight above with the actual package weight and use the heavier number to determine shipping cost
*Fractions are rounded to the next whole pound.
Dimensional weight reflects package density – the amount of space a package occupies in relation to its actual weight. Think about the available space in a truck or plane – if your package is taking up a bit more space than the weight of the package captures in rates, you might see a change in cost in 2015.
Often referred to as “Dim weight”, pricing is based on volume versus actual weight of shipments. It is calculated by determining the cubic size of a package — multiplying its length by width by height and dividing by 166 (for domestic shipments) or 139 (for shipments to Canada). Dimensional weight is a new pricing method being rolled out by major carriers including FedEx and UPS in 2015. The merchant will be charged the greater of the Dim weight or the actual, scale based weight. Learn more.
Dim weight is the weight of a package based on its size rather than "actual weight". UPS and FedEx are implementing dim weight pricing in 2015 for their ground-based services and the heavier of actual weight or dim weight will be used to price packages.
To calculate, you will first determine the package dimensions in inches. For each package dimension, measure at the longest point, rounding each measurement to the nearest whole number (for example, 9.00 to 9.49 will be considered 9, and 9.50 to 9.99 will be considered 10).
Then, multiply the package length by the width by the height and divide by 166 (139 for packages headed to Canada). The result is the dimensional weight. For those services where dimensional weight is relevant, take the greater of this calculation or the actual, scale based weight to calculate the shipping cost.
All the time for UPS and FedEx ground based services in 2015. USPS also applies dimensional weight to some packages (eg Priority Mail packages that exceed 1 cubic foot addressed to Zone 5 or above). So, best practice is to always enter package dimensions to make sure you're getting the best rate possible.
Changes for UPS went into effect on December 29, 2014. The same changes for FedEx went into effect on January 1, 2015.
You'll be paying the higher price between dimensional weight and actual weight. In simple terms, if your package is light weight but large (like a canvas painting), you'll be paying more.
UPS and FedEx