Free CPA Calculator
Find the highest cost per acquisition you can pay while still hitting your target ROAS. Compare it to what you are paying today to see bid headroom.
Max affordable CPA
$26.67
Formula: payout ÷ target ROAS (80 ÷ 3).
Headroom
Over budget$3.33over max
CPA is above the max for this target. Cut spend or improve payout.
What is CPA?
CPA is cost per acquisition — how much you spend in ads to get one conversion (sale, lead, or signup). For affiliates, “acquisition” is usually a tracked conversion that pays commission.
Max CPA formula
Max CPA = payout ÷ target ROAS. If your offer pays $90 and you need 3x ROAS, you can spend up to $30 per acquisition.
When to use this tool
Before you raise bids, launch a new geo, or switch offers — plug in payout and target ROAS so you know the CPA ceiling before spend climbs.
