Dimensional weight and shipping glossary

Actual weight

The physical weight of the finished parcel measured on a scale, including product and packaging.

Billable weight

The weight selected for rating after comparing actual weight with dimensional weight and applying the relevant rules. It is not the entire price.

Dimensional divisor

The conversion factor used to turn package volume into a dimensional-weight estimate. The correct divisor depends on service, route and agreement.

Dimensional weight

A calculated weight representing the space a parcel occupies. It is commonly found by dividing length × width × height by a divisor.

Girth

A measurement around a package. For a rectangular parcel it is often described using the two shorter dimensions, but the exact formula must come from the applicable service rule.

Inside dimensions

The usable space inside a box. These are useful for product fit but are not the same as the outside dimensions normally used for shipment measurement.

Irregular package

A parcel that is not a standard rectangular box or that includes protrusions, curves, exposed parts or unusual packaging. Special measurement or handling rules may apply.

Length

Generally the longest outside side of a finished parcel. Confirm the provider’s definition for unusual shapes.

Nominal box size

A box’s named or listed size. It may describe inside dimensions and may differ from the finished outside measurement.

Outside dimensions

The maximum external length, width and height of the sealed parcel, including bulges and attached materials.

Package volume

For a rectangular parcel, length multiplied by width multiplied by height, expressed in cubic inches or cubic centimeters.

Right-sizing

Selecting or designing packaging that removes unnecessary empty space while maintaining product protection and operational performance.

Rounding rule

A rule specifying how dimensions or calculated weight are converted to rating values. Rounding may occur at different stages, so use the current service method.

Surcharge

An additional charge triggered by factors such as location, handling, size, demand, fuel or optional service. Surcharges are separate from the dimensional-weight formula.

Void fill

Material placed around a product to reduce movement and improve protection. Excessive void fill can indicate avoidable package volume.

This glossary is educational and does not replace a provider’s current tariff, service guide or contract.