Freight dimensions and freight weight should never be estimated. It's critical to measure the length, width and height to the nearest inch, especially for LTL shipping, as these carriers rely on exact dimensions to determine how much freight can fit on one truck. Estimated measurements could result in a costly carrier adjustment.
Much like freight dimensions, weight needs to be accurate as well. Freight carriers typically use the listed weight to determine how much freight can fit into an individual truck. The Department of Transportation (DOT) has truck weight regulations in place and incorrect weights will likely also lead to pricing adjustments.