Facebook Ads Budget Calculator
How much a test actually costs to run properly, worked from your target cost per result rather than a number somebody quoted on a podcast. Free, no signup.
How much a test actually costs to run properly, worked from your target cost per result rather than a number somebody quoted on a podcast. Free, no signup.
Daily, per ad set
$250
Total for the test
$5,250
3 ad sets over 7 days
Spend per creative
$438
The maths: 50 results per ad set at $35 each, because an ad set needs roughly 50 optimisation events a week to leave the learning phase. Fewer events than that and the result is noise rather than a decision.
Budget set, now build the test in one publish
Once you know what the test costs, the slow part is building it. Volume Creatives turns your creatives, copy and ad sets into every combination and publishes the batch paused, named and tagged.
The honest answer is a calculation, not a number. An ad set needs roughly 50 optimisation events in a rolling seven day window to leave Meta's learning phase. Until it does, delivery is unstable and the results are noisy enough that acting on them is guesswork. So the budget a test needs is simply the cost of buying those events: 50 results priced at your target cost per result, per ad set, over the window you intend to run.
Every ad set carries its own learning requirement. Splitting a fixed budget across six ad sets does not give you six reads, it gives you six under-fed ad sets that all stay in learning and none of which produce a decision. If the calculator says your budget only supports two ad sets, run two. Structural discipline beats thoroughness that cannot be funded.
The same logic applies one level down. Budget flows to whichever creative Meta favours early, so adding more creatives to a thin ad set mostly produces variants with almost no data attached. As a working rule, each creative wants enough spend to produce at least a few results, which is why the calculator warns when the per-creative spend drops under three times your target cost. Use the combination calculator to see how quickly a test matrix grows, and the ROAS calculator to sanity check the target itself.
It assumes your target cost per result is roughly achievable. If your real cost lands at double the target, the test needs double the budget or double the time. It also ignores the first day or two of volatile delivery, so treat the total as a floor rather than a precise forecast. The point is not exactness. It is to stop tests being launched that could never have reached a conclusion.
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