cost per acquisition calculator

Cost Per Acquisition Calculator — Marketing KPI Tools
CPA = Total Spend ÷ Total Conversions

How much it costs to acquire one paying customer. Should be less than your LTV.

Enter values to calculate

about this tool

cost per acquisition (cpa) tells you how much you’re spending on average to win each new customer or lead. it’s one of the most important efficiency metrics in performance marketing — if your cpa is higher than the value a customer brings in, your campaigns aren’t sustainable, no matter how impressive your click numbers look.

this free cpa calculator lets you enter your total campaign spend and number of acquisitions to get your cost per acquisition instantly. it’s a quick, no-fuss way to evaluate campaign efficiency without needing to pull up a spreadsheet.

it’s valuable for performance marketers, growth teams, and anyone running paid acquisition campaigns across google ads, meta, or any other channel. tracking cpa over time helps you identify which campaigns and channels are delivering the best results for your budget — and which ones might need to be optimised or cut. understanding your true cost of acquisition is the starting point for building a marketing strategy that’s both effective and financially sustainable.