Packing methods in Shopify Multi Carrier Shipping Label App

Packing your products in the right way is not only important for the seamless delivery of your package but also for saving shipping costs. Shopify has certain limitations in handling the packing process based on product dimensions. So, it is really important to have a solution that lets you handle the packaging process with ease and saves on shipping costs. One of the easiest solutions is to use the Shopify Multi Carrier Shipping Label app which helps you automate this process.

This guide explains the different packing methods in the Shopify Multi Carrier Shipping Label app and how you can use these methods to automate your packaging process.

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The Shopify Multi Carrier Shipping Label app offers the most advanced packaging methods that are based on the product weight as well as dimensions. To configure the packing method, head to App Settings –> Shipping –> Packaging, and choose the required packing method. Below are the four parcel packing methods in Shopify Multi Carrier Shipping Label App: 

1. Weight based Packing
2. Box Packing
3. Stack Packing
4. Quantity based Packing


Weight based Packing: Based on the products’ weight

This packing method is based on the products’ weight. You can set a max.weight (maximum weight) limit for your box and the app automatically packs the maximum number of products possible in this box based on the max.weight defined.

This is the recommended packing method since most often weight is used as a parameter to handle the packaging and calculate accurate shipping rates. So, by default, the app will calculate the rates based on this packaging method.

In the below image, the max.weight is configured as 50 lbs. This means that in this particular box, items with a maximum weight of 50 lbs can be packed. So, as soon as the weight of the entire package crosses this value (50 lbs), the app will automatically select another box, and the remaining items are packed.


Understanding the method with an example; you have eight items and each of them weighs 10 lbs. The max.weight of the box is 50 lbs. So, five of them go into one package and the next three will go into another package since the ‘Max Weight’ set here is 50 lbs.

Now, if max weight is 50 lbs and the product weight is 60 lbs, the product cannot be packed in the box and no rates will be provided at checkout, and the label generation will fail. In this case, you have to add the max.weight as 60 lbs so that, the product is packed correctly into the box.

Under the advanced configuration, you have the option to configure the box weight and also add a max.quantity that will be packed in a box.

Box Packing: Based on the products’ weight & dimensions

This is an advanced packing method which is entirely based on the box Volume, Dimensions, and Weight.

When your products have different weights and dimensions, this packing method allows you to set up different packages based on the products’ weight & dimensions. So, whenever a customer places an order, the app automatically chooses the right box and calculates the rates accordingly.

Ensure that you have entered the product dimensions under the “Products” section in order to use the box packing method as shown below.


In this method, the volume of the products is used to fit the total volume of the packages that you add. A box is filled based on the dimensions of the product until the box is completely filled or a minimum volume is left vacant. If the next unpacked product has a volume greater than the vacant volume, it goes into the next box and this process is continued until all products are packed properly.


In this method, you can create boxes based on your product weight & dimensions. You can add the Inner and Outer dimensions of the box, the weight of the box, max weight, and the buffer height, as shown below.


Buffer height: This allows you to give a percentile adjustment value while packing the products. For example, if you have set up the box height as 100 cms, and you have a product with 25 cms height, you can fit 4 items in the particular box. But, if the product height is slightly higher, (maybe 27.5 cms), you would not be able to fit the products properly. To handle this, you can add a 10% buffer height, that will increase the height, and 4 items can be correctly packed in the box.

Stack Packing: Based on the products’ height

The Stack packing method is based on the product height. You can add a box based on your product dimensions and the app automatically packs the products one over the other, based on the height configured under this packing method.


You can also add a Buffer Height similar to box packing if required. Also, this method allows you to add the max.weight of the box as well, which allows the app to pack the maximum number of products in the box based on this weight.

Quantity based packing: Based on the products’ quantity

Using the quantity based packing method, you can set up the packing based on the number of items that can be packed in one box. Add a box based on your product dimensions and you can set the max.quantity that can be packed in one box.


For example, in the image above, the max.quantity is set as 10. This means that only 10 items will be packed on this box and a new box will be generated for the 11th item.

Also, this packing method can be used if you would like to pack your items individually. To do this, you can set the max.quantity as 1, and provide the weight and dimensions the same as the product weight and dimensions. This means that only one item will be packed in each box.

Enabling the volumetric weight of a product

In order to choose the weight of the product, the app checks if the volumetric weight is enabled or not during the Box packing and Stack packing process.


If the volumetric weight of the product is not enabled

If the volumetric weight is not enabled under the app, the actual weight & dimensions of the product will be chosen as the product weight & dimensions for the packing process.

If the volumetric weight of the product is enabled

If the volumetric weight is enabled, as shown above, the volumetric weight of all the products is calculated.
The actual weight of the product and the volumetric weight is compared and the highest among them is chosen for the packing process.

For example, if the actual weight of a product is 5 lbs and the volumetric weight is 7 lbs, the volumetric weight of 7 lbs will be chosen as the product weight for the Box Packing and Stack packing process.

Calculation of Volumetric weight of a product

You can calculate and verify the dimensional weight of your products from different carrier websites as given below. 

1. FedEx volumetric weight calculation
2. DHL volumetric weight calculation
3. UPS volumetric weight calculation
4. USPS/Stamps volumetric weight calculation
5. Canada Post volumetric weight calculation
6. Parcelforce volumetric weight calculation

If you have any queries with the setting up of the app, you can look into setting up Shopify Multi Carrier Shipping Label app. Also, for any issues with the app, the troubleshooting guide for Shopify Multi Carrier Shipping Label app would help you.

Also, if you have any other queries regarding the packaging process with the app, do contact PluginHive support.