How to use this calculator
Enter attributed revenue, ad spend, pre-ad contribution margin, and desired after-ad profit for the same period.
Formula and method
ROAS = attributed revenue/ad spend. Break-even ROAS = 1/pre-ad contribution margin. Profit after ads = revenue×margin − ad spend.
Worked example
Revenue 10,000, spend 2,000 and 40% margin give 5× ROAS, 2.5× break-even ROAS and 2,000 profit after ads.
Assumptions and supported scope
Assumes incremental attributed revenue and constant contribution margin. Attribution and causal incrementality are unverified. No fixed overhead or tax estimate.
Method references
Method and worked example checked against the calculator implementation. About our methods · Report a correction