Question 1

What is dimensional weight?

Accepted Answer

Dimensional (DIM) weight is a pricing technique used by carriers that considers package volume, not just actual weight. It is calculated as (Length × Width × Height) ÷ DIM divisor. Carriers charge based on whichever is greater: actual weight or dimensional weight.

Question 2

What DIM divisor should I use?

Accepted Answer

The standard DIM divisor is 139 for inches/pounds (US domestic) and 166 for some international shipments. The calculator defaults to 139 but you can change it to match your carrier's specific divisor.

Question 3

How is the shipping rate calculated?

Accepted Answer

The calculator uses a base rate plus per-pound rate model. Total = base rate + (billable weight × per-lb rate) + handling fee + optional markup percentage. You can adjust all parameters to match your carrier or fulfillment scenario.

Question 4

Can I add a handling fee or markup?

Accepted Answer

Yes. Enter a flat handling fee and/or a markup percentage. The markup is applied to the shipping cost before the handling fee is added, which is useful for e-commerce stores that charge customers a premium for shipping.