What is the weight of something without its container or income minus all expenses called?

A net (sometimes written nett) value is the resultant amount after accounting for the sum or difference of two or more variables.

In economics, it is frequently used to imply the remaining value after accounting for a specific, commonly understood deduction. In these cases it is contrasted with the term gross, which refers to the pre-deduction value. For example, net income is the total income of a company after deducting its expenses—commonly known as profit—or the total income of an individual after deducting their income tax.

Net weight refers to the weight of the product alone, discounting the weight of its container or packaging.