Seller tools
Packaging is where sellers control the bill. These two tools turn a product list into billable weights, so the expensive packages show up before the carrier finds them.
Box size calculator
Smallest standard box that fits a product, with padding, and the DIM and billable weight that box produces per carrier.
One product at a time
Batch DIM weight calculator
Paste a list of packages and get billable weight per carrier for every row, with totals and CSV export.
A whole catalog at once