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FedEx SmartPost Dimensional Weight (DIM) & 71 lb plus rates

By Last updated on: June 22, 2022

Effective January 22, 2018, FedEx will apply dimensional weight pricing with a dimensional divisor of 139. Plus, a per pound rate for all packages over 71 lbs on all SmartPost (FedEx Ground Economy) packages. Dimensional weights are, of course, (length x width x height) divided by a DIM factor. The dimenstional divisor is 139 by default. Since the beginning of the service offering, DIM weights have not been applied to SmartPost. Many Refunfd Retriever customers move from Ground and Home Delivery services to the lower price option of SurePost. This service might not be as cost-effective as before.

FedEx Per Lb rate for 71 Lbs up

FedEx SmartPost will also introduce per-pound rates for packages rated above 71 lbs. The shipping charges for a FedEx SmartPost Oversize package will be based on the greatest of the package’s actual rounded weight, dimensional weight, and 71 lbs.

DIM weight = package length x package width x package height / DIM divisor

Round each measurement to the nearest whole inch

What is FedEx SmartPost?

FedEx Ground Economy, formerly FedEx SmartPost, is a service option that utilizes the infrastructure of FedEx while relying on the U.S. Postal Service to provide final delivery to your customer. Packages are typically delivered in 2–7 business days based on the distance to the destination. There is no charge for residential or Saturday delivery, but the time in transit is greater than ground services.

FedEx SmartPost DIM (Now FedEx Ground Economy)

SmartPost DIM

January 1, 2018, FedEx Ground Economy Changes.  

  • A Third Party Billing Surcharge of 2.5% will apply to shipments billed to a third party.
  • Non-Machinable Surcharge for all services will increase from $2.75 to $2.90 per package.
  • Package Relabel Surcharge will increase from $0.50 to $0.60.
  • Delivery Area Surcharge will increase. $1.20 to $1.30 and $1.70 to $1.85 per package for shipments in the contiguous U.S., Alaska & Hawaii.

In 2015, UPS subjected all SurePost packages to dimensional weight charges. SurePost boxes follow the same dimensional weight formula as UPS Ground, and UPS has not yet come out with the 2018 rate and fee changes.

Effective March 8, 2021:

FedEx SmartPost and FedEx SmartPost Returns are now FedEx Ground Economy and FedEx Ground Economy Returns. FedEx will still provide the same residential shipping for low-weight packages. It has a new name: FedEx Ground Economy, formerly FedEx SmartPost.

Brian Gibbs

Author Brian Gibbs

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Brian Gibbs | President of Refund Retriever

Brian Gibbs founded Refund Retriever in 2006 while running his first eBay-based business and seeing the shortcomings of other shipment auditing companies. Refund Retriever's primary focus is FedEx and UPS parcel invoice auditing. After graduating from Texas A&M University in 2001, he graduated from the University of Houston in 2004 with a JD and MBA. Gibbs has been featured in Forbes, Entrepreneur, and other publications discussing parcel auditing, shipping, e-commerce, and more. Learn more at or call (800) 441-8085 for more information.

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