Tools

Dimensional weight calculator

Understand DIM weight vs actual weight. See when DIM charges kick in and how to avoid them.

How DIM works

Carriers price by the greater of actual and dimensional weight. Optimization: reduce any one dimension, use right-sized boxes, or switch to mailers.

What is dimensional weight?

It is a pricing weight based on volume using a divisor (e.g., 139 for UPS/FedEx). The billed weight is the greater of DIM and actual.

How do I reduce DIM charges?

Use right-sized packaging, reduce any one dimension, and avoid oversized thresholds to lower calculated DIM weight.

Length (in)

Width (in)

Height (in)

Actual Weight (lb)

USPS

5.8 lb

Dim: 5.8 lb (divisor 166)

UPS

7.0 lb

Dim: 7.0 lb (divisor 139)

FedEx

7.0 lb

Dim: 7.0 lb (divisor 139)

Tip: Billed weight is the greater of actual and dimensional weight. Reduce any one dimension or use a right-sized box to lower dimensional weight.