How to calculate CPL
Divide the complete cost in the chosen scope by the number of qualifying outcomes in the same analysis period. For $2,400 spent and 80 qualifying leads, CPL is $30. A lead should meet a stated definition, such as a valid enquiry, rather than merely a page view or form start.
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Define an outcome before counting it, document the cost categories included, and allow for conversion delays. If there are no qualifying outcomes, the average cost per outcome is undefined. Do not compare a narrow media-only cost with an all-in sales-and-marketing cost as if they were the same measure.
