Shipping
How dimensional weight affects ecommerce shipping costs
A practical explanation of dimensional weight, carrier divisors, and carton choices for online sellers.
Dimensional weight is a pricing method that lets carriers charge for the space a package occupies, not only for its scale weight. It matters most when a carton is large, light, or padded with excess void fill.
For ecommerce teams, the practical takeaway is simple: carton selection changes transportation cost. A slightly smaller box can lower billable weight, reduce zone-based surcharges, and make rate comparisons easier to explain.
Use a dimensional weight calculator during packaging reviews, new product launches, and carrier negotiations. The calculation is an estimate, but it gives teams a shared number before they commit to a carton.