Length weight calculation (window)

Last updated: 21 July 2026

Settings > Weight calculation > next to the drop-down menu Length weight calculation.

In this window, you can set the rules that apply to weight calculations for long goods.

General

Function	Description
Name	Used for identification. The name is shown in the list on the left when a new configuration is saved.
Description	Free text field for internal notes. The description is not displayed anywhere else but here.
Calculate length weight only if stackable Do not calculate length weight if stackable	These settings allow you to define what you mean by ‘stackable’ in your business. Whether or not stackable packages are to be regarded as long goods, that is to say, whether you mean that the bottom or top item is the one that is ‘stackable’. The checkbox on the parcel row in the order reception determines which parcels are stackable. + : All parcels that meet the criteria below are regarded as bulky goods. The tick box Stackable on the consignment line is irrelevant. + : Parcels that meet the criteria for long goods set out below and are stackable and are regarded as long goods. + : Parcels that meet the criteria for long goods set out below and not are stackable and are regarded as long goods. + : This cannot be configured, as the settings would otherwise contradict each other. See examples in Setting up weight calculation for long goods.

Minimum

Function	Description
Lowest length for length weight calculation	Enter the minimum length, in metres, for a parcel to be classified as long goods.
Lowest length weight	Enter the minimum length weight, in kg, that the calculation can return. Example: If you enter 35 kg in the field, and if the result of the length weight calculation for long goods is 22 kg (i.e. less than 35 kg), 35 kg will be used as the length weight.

Maximum

Function	Description
Maximum length Maximum width Maximum height	Enter the maximum length, width and height in metres for a parcel to be classified as oversized goods.
Maximum total height for delivery	Enter the maximum total height, in metres, of all packages on the order for them to be classified as long goods.

Multiple package settings

Select how the length weight calculation should be carried out if the order contains more than one package. The length weight is calculated separately for each consignment and then totalled to give the total length weight length.

Function	Description
Length to use	Maximum: Use the length of the longest package in the length weight calculation for long goods. Sum from all packages: Use the sum of the lengths of all packages as the length for the length weight calculation. If you choose Sum from all packages, we recommend that you choose Maximum for Width to use. Individual: Use the length of each individual parcel.
Width to use	Maximum: Use the width of the widest package when performing a length weight calculation. Sum from all packages: Use the sum of the widths of all packages as the width in the length weight calculation. Individual: Use the width of each individual parcel.

Rules

In the table, enter the rules that will apply to the long goods weight calculation. Enter one line per row.

In the first four columns (Width, Height, Length and Weight) you indicate which conditions apply. You can enter one or more conditions on the same line, for example Width and Height, or simply Width.

In the next two columns (kg/m and Fixed weigth), enter the result you want. Select whether you wish to use a fixed length weight (Fixed weigth) for parcels that meet the criteria in a row, or if you wish to use a factor (kg/m) by which the parcel’s length is multiplied to calculate the length weight. For more information and examples, see Setting up weight calculation for long goods.

Function	Description
Width Height Length Weight	Specifications for width, height and length in metres. Weight specifications are given in kilograms. Example: If you enter “1.61” in column Width, Opter will check whether the width of the package is 1.61 metres or more. If this is the case, Opter uses the factor in column kg/m or the value in column Fixed weigth when calculating the length weight. If the width of the parcel not is 1.61 metres or more, Opter moves on to check the next row in the table.
kg/m	A factor used to calculate the weight per metre, i.e. how many kilograms one metre of the package weighs. The factor is multiplied by the length of the package.
Fixed weigth	Parcels that meet the criteria for long goods are assigned a fixed length-based weight. Expressed in kg.
	Moves the rows up or down. Opter checks the rules from the top down in the table. Arrange the rules in the order you wish.
	Deletes the line.

See also

• Calculating the pricing weight

• Setting up weight calculation for long goods