How is total weight calculated?
Total Weight = Empty box weight + Weight of all items in the return
Empty box weight: the weight you set in this very same dialog further down, so double-check the value you have set.
Item weight: the weight you have set for the variant in your Shopify store.
Does changing the weight for a variant in Shopify change the weight on existing orders?
No, orders in Shopify are immutable; therefore, the weight for line items in existing orders is not updated. Changes to the weight of a variant are available to all new orders.
Can I bulk update the weight of products?
Yes, go to the Products page in your Shopify store and use the Bulk-Edit feature to change weights for multiple products at once. Copy & Paste also works in the table-like editor.
The weight does not match the weight I see in, e.g., ShipStation for the label?
Weight calculations on our side are accurate. Please double-check in your external account (e.g., ShipStation) if weight is calculated solely for products or also for products + weight of the box.