How to use the target CPA budget calculator
How much budget does a conversion target need at a given CPA? The relationship is target conversions × target CPA = budget required. The field labels mark which side is an input, so the direction of the calculation stays clear.
Add an expected conversion rate and you can plan in clicks as well. Target CPC = target CPA × expected conversion rate, and clicks required is the budget divided by that CPC. At a 2% rate and a $500 target CPA, target CPC is $10.00 and 100 conversions need 5,000 clicks.
Enter a budget you actually have and the tool reverses direction to show the conversions it buys. Conversions are whole units, so the figure is rounded down, and the label says so only when rounding actually happened. Surplus or shortfall is your budget minus the budget required, so it turns negative when you are short.
The target CPA here is your own number, not an industry average. Set it inside the profit a single conversion leaves, so check order value and margin to find that ceiling before entering it.
Frequently asked questions
Target conversions and target CPA are inputs; budget required is the result. Adding an available budget runs it the other way and returns the conversions that budget buys at your target CPA.
Usually not. Scaling spend exhausts the most responsive audience first and CPA tends to drift up. This is arithmetic that assumes the target CPA holds, so re-check it against live results.