How to use the acos calculator
Calculate advertising cost of sales as a percentage of ad-attributed sales. Also see the equivalent ROAS multiple. Enter your figures in the fields above and select Calculate. The result updates when you change an input.
Formula
ACOS = Advertising spend ÷ Ad-attributed sales × 100
Example and interpretation
If advertising spend is $250 and attributed sales are $2,000, ACOS is 12.5%. Whether that is profitable depends on product contribution margin and other costs.
Important assumptions
This calculator provides a general estimate for planning and educational purposes. It is not accounting, tax, legal or investment advice. Verify assumptions and provider fees before making financial decisions.