// multi-utility computation suite · offline · instant · precise
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fin.cost-per-acquisition Calculator
Calculates Cost Per Acquisition and monthly revenue needed to recover CAC at a given profit margin. CPA-to-LTV ratio is the fundamental paid marketing efficiency metric — CPA should not exceed 33% of LTV for a sustainable unit economics model.
Inputs
Ad Spend
Reference formula or conversion factor shown for context.
New Customers
Reference formula or conversion factor shown for context.
Blended Margin Pct
Profit as a percentage of revenue. Margin % is always lower than markup % — a $5 profit on a $15 selling price is 33% margin but 50% markup.
Target Payback Mos
Reference formula or conversion factor shown for context.
Results
cost per acquisition (CPA)
The total monetary cost computed for the given inputs.
revenue needed to recover
Sample size or count used in the calculation.
monthly revenue for payback
Sample size or count used in the calculation.
total ad spend
The combined total across all inputs and components.
customers acquired
Reference formula or conversion factor shown for context.
profitable if
Revenue minus all costs -- the net gain from the activity.