Calculator

ACOS Calculator

ACOS shows how much you spend on ads for each dollar of ad sales. Compare it with your break-even point to see if ads pay for themselves.

AVAILABLE · runs in your browser, nothing is sent

Your numbers

Ad spend ($)Total advertising spend for the period.

Ad sales ($)Sales attributed to your ads in the same period.

Profit margin before ads (%)Margin after product cost and fees, before advertising.

Your ACOS{{r0}}

ROAS (return on ad spend){{r1}}

Break-even ACOS{{r2}}

Gap to break-even (points){{r3}}

Replace the example numbers with your own. Every field has a short hint.
Fix any message shown in the orange box. Fields must be valid numbers inside the allowed range.
Read the results and the plain-language note under them.
Change one number at a time to see what moves the result.

Margin is the margin before advertising, after product cost and marketplace fees.
Ad sales use the attribution window shown in your ad console.
The pre-filled numbers are only an example to show how the tool works.

Results are estimates from your inputs, not financial advice or a guarantee of outcome.

What is a good ACOS?

There is no universal number. A good ACOS is below your break-even, or higher only when you have a clear launch goal.

ACOS or ROAS?

They show the same relationship in different ways. ROAS is the inverse of ACOS.

What about organic sales?

ACOS ignores them. Use the TACoS calculator for the whole-business view.