How to calculate volumetric weight?

If you are invoiced by weight

Shipping rates are based on a minimum density of 12.4 lb per cubic foot (this may vary according to your agreement). The transportation cost is calculated using the higher of the actual weight and the volumetric weight.

To calculate a parcel’s volumetric weight, multiply its three dimensions and divide by the appropriate divisor, in inches or centimetres.

In inches (length × width × height) divided by 1728 = parcel volume in cubic feet.
- Example: (24 × 12 × 12 in) / 1728 = 2.0 cu. ft.
- 2.0 cu. ft. × 12.4 lb = 24.8 lb

In centimetres (length × width × height) divided by 28316 = parcel volume in cubic feet.
- Example: (61 × 30.5 × 30.5 cm) / 28316 = 2.0 cu. ft.
- 2.0 cu. ft. × 12.4 lb = 24.8 lb

If you are invoiced by parcel

If you are billed by parcel, volumetric weight does not apply in the same way. Depending on the terms of your agreement with Nationex, a surcharge may apply if your parcel exceeds, for example, 4.0 cubic feet. Standard class sizes are:

Class A: 0 to 3.5 cu. ft. = No charge
Class B: 3.51 to 8.0 cu. ft.
Class C: 8.01 to 12.0 cu. ft.
Class D: 12.01 to 16.0 cu. ft.
Note: Parcels weighing 40 lb or more are also subject to the Class B charge

In inches (length × width × height) divided by 1728 = parcel volume in cubic feet.
- Example: (36 × 18 × 18 in) / 1728 = 6.75 cu. ft.
- 6.75 cu. ft. = Class B

In centimetres (length × width × height) divided by 28316 = parcel volume in cubic feet.
- Example: (100 × 60 × 30 cm) / 28316 = 6.35 cu. ft.
- 6.35 cu. ft. = Class B