Small Business

ROAS Calculator

Calculate return on ad spend from attributed revenue and advertising cost. Change the default values to match your project and the results update instantly in your browser.

Your inputs

Enter your numbers

How it works

How to calculate it

The calculator applies the values you enter to this formula:

ROAS = attributed revenue ÷ advertising spend.

How to use this calculator

Choose a consistent attribution window.
Enter attributed conversion value.
Enter advertising spend from the same scope and period.

Worked example

$15,000 attributed revenue from $3,000 ad spend equals 5× ROAS, or 500%.

Important assumptions

Revenue attribution is assumed to be accurate.
ROAS is not profit and excludes product cost, fees, labor, and overhead.
Compare performance using a consistent attribution window.

Common mistakes to avoid

Calling revenue ROAS profit.
Comparing different attribution models.
Ignoring conversion delay in recent data.

Method reviewed June 10, 2026. Prices and rates are user-provided defaults and should be replaced with local values.

Learn the method

Guides for a better estimate

Understand the assumptions, practical limits, and measurement decisions behind this calculator.

Business 7 min read

What Is ROAS and How Do You Calculate It?

Read guide

Common questions

Frequently asked.

What inputs matter most for the ROAS Calculator?+

Choose a consistent attribution window. Enter attributed conversion value. Enter advertising spend from the same scope and period. Replace every default with values from your own project or records.

What common mistakes affect this roas calculator?+

Calling revenue ROAS profit. Comparing different attribution models. Ignoring conversion delay in recent data.

Does Abelost store my inputs?+

No. The calculation runs locally in your browser and your project values are not sent to Abelost.