How does adding product and package weights affect shipping settings?

Topic summary

Central issue: whether Shopify automatically combines product variant weight with the package weight set in shipping settings to calculate accurate carrier shipping options.

Secondary question: how to input a mixed-unit product weight (e.g., 1 lb and 6.7 oz) when the interface only allows one unit at a time (lbs, oz, kg, g), and whether conversion to a single unit is required.

No answers or outcomes yet; the thread is open with both questions unresolved.

No images, videos, or attachments are referenced; terms used include product variants (different versions of a product) and shipping settings (Shopify’s configuration for shipping rates and packages).

Summarized with AI on January 5. AI used: gpt-5.

I have some questions if i add my weight in shipping settings of my package and then add my weight of my product on my product variants will it automatically merge the two weights together to get accurate shipping for various shipping options?

Another question, my product weight for example is 1lb and 6.7 oz. how can i input that onto my product weight when it only gives me lbs,oz,kg and g options at a time?