Definitions for "Conversion Cost"
Resources spent to process material in a single stage, from one type to another. The costs of converting iron ore to hot metal or pickling hot-rolled coil can be isolated for analysis.
Direct labour cost plus manufacturing overhead cost.
Total cost per sale, calculated by dividing the total cost of an advertising campaign by the number of resulting sales. For example, if $1000 is spent on an advertising campaign and that campaign results in 20 sales, the conversion cost per sale is $50 ($1000 / 20). That means it costs $50 to generate one sale.
In search engine marketing (SEM), when a visitor becomes a buyer, by this you can calculate your number of visitors and buyers among those visitors.