About this tool
CPA Calculator is a free, in-browser tool for the cost per acquisition (or cost per action) of a campaign. It has two modes: Direct, where you enter cost and conversions, and From funnel, where you enter ad spend, clicks and a conversion rate. The mode selector swaps the input fields; all math runs locally and nothing is uploaded.
In Direct mode, CPA = cost ÷ conversions. In funnel mode the conversions are derived first as conversions = clicks × (CVR ÷ 100), then CPA = spend ÷ conversions. The result tiles show the CPA, the conversion count used, and the underlying cost so both modes are directly comparable.
Use it to price a lead or sale, to sanity-check a bid against a funnel's click-to-conversion rate, or to compare acquisition cost across channels. CPA and cost are formatted as currency; the conversion count allows fractional values when derived from a funnel.