Dimensional weight, also known as volumetric weight, is a pricing technique for commercial freight transport (including courier and postal services), which uses an estimated weight that is calculated from the length, width and height of a package.
- Measure the length, width and height of a single unit in either inches or meters. Whichever unit of measurement you use, measure all dimensions in the same unit of measurement. ...
- Multiply the length, width and height of the unit together.
- Divide the result by 1728 if your measurements were in inches. ...
- Finished.
This can be why some lighter shipments seem like they cost more than you think they should.