PMax Budget & ROAS Calculator
Enter your current PMax performance to see your real ROAS, your recommended budget, and your break-even point. Built from daily experience running PMax for a real e-commerce brand.
Your Numbers
Total PMax spend this month
Revenue attributed to PMax
Gross margin after COGS
Your goal (e.g. 4 = $4 revenue per $1 spend)
What is ROAS?
Return on Ad Spend. A ROAS of 4x means you earn $4 in revenue for every $1 spent. A healthy PMax ROAS depends on your margin -- a 40% margin business typically needs 2.5x+ to break even.
Fill in your numbers to see results
A note on PMax budgets
PMax needs time to learn. Google recommends at least 6 weeks before making significant budget changes. If you are below your ROAS target, the first levers to pull are your asset groups, audience signals, and product feed quality -- not just cutting spend.
The break-even calculation here uses gross margin only. Factor in fulfilment, returns, and customer acquisition cost for a true profitability picture.