DIM Weight Calculator

Your DIM: 0 Lbs.

Length:
Width:
Height:
Weight:

What is DIM?
DIM, or dimensional weight, is based on the measurements of a package:
(L x W x H) / DIM divisor
The DIM divisor for 2025 is 139. When you send a package, your carrier will electronically scan it to determine its dimensions and calculate the DIM weight, rounding up to the next pound. If the DIM weight is higher than its actual weight, you’ll pay based on the DIM weight. This makes it absolutely vital to choose the right packaging.

Actual Weight

0 Lbs.

vs

Dimensional Weight

0 Lbs.

Actual Weight

Cost Per Package

$0.00

vs

Dimensional Weight

Cost Per Package

$0.00

*Based on published 2025 residential ground shipping prices

Results are based on the following inputs. Modify as needed to calculate DIM and its impact.

Insert your package dimensions to see how DIM is impacting you.

Length (inches)*

Width (inches)*

Height (inches)*

Weight (pounds)*

Zone
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Zone 3
Zone 4
Zone 5
Zone 6
Zone 7
Zone 8

Carrier
FedEx
UPS
USPS

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Go Further: Learn More About Dimensional Weight (DIM)

What is dimensional weight?

Dimensional weight (also known as volumetric weight) is a calculation technique that major parcel carriers (FedEx, UPS, and USPS) use to calculate shipping fees based on the size of the package, rather than its actual weight.

Historically, major carriers charged shipping fees based on the physical weight of the package and the distance to the destination.

When is dimensional weight pricing used?

Shipping companies use dimensional (DIM) weight to account for the difference in weight and size of packages.

How to calculate DIM weight

As the name suggests, this pricing model accounts for the dimensions (length, width, and height) of cargo to calculate the shipping charges. Shipping fees are calculated by multiplying the length, height, and width of the package and dividing the product by a DIM divisor (also referred to as a DIM factor).

The formula for calculating the DIM weight of a package is:

DIM weight = (length x width x height) / DIM divisor

Dimensional weight calculator for FedEx

DIM weight for FedEx is calculated by multiplying the length by the width by the height and dividing the product by 139.

Dimensional weight calculator for UPS

Here’s how you can calculate the DIM weight for UPS:

1. Measure the length, width, and height of the package and round off each measurement to the nearest whole number.
2. Next, calculate the cubic size (volume size) by multiplying the length by the width by the height.
3. Finally, divide the volume size of your package by the DIM factor.

Dimensional weight calculator for USPS

Determine the cubic size of the package by multiplying its length by the width by the height. Divide the product by the carrier’s DIM divisor to calculate the DIM weight.