Back to calculator
Business & eCommerceGenerated accuracy model review: 2026-05-06
ROAS Calculator accuracy and testing
This page documents how Calwarden builds trust for this calculator: source notes, regression-style default tests, limitations, assumptions, unit handling, rounding, and visible change history.
Formula source
- ROAS = (Revenue / Ad Spend). A ROAS of 4.0 means you earned $4 for every $1 spent.
Test cases
Default input regression check
Generated from the checked-in default inputs and calculate function.
Inputs
- Ad Spend: $1,000
- Ad Revenue: $4,000
Expected outputs
- ROAS Ratio: 4.00x
- ROAS %: 400.00%
Known limitations
- This page documents the checked-in calculator logic and does not certify results for every real-world edge case.
- Use the result as a planning estimate unless the calculator page states a stricter purpose.
Assumptions
- This calculator treats attributed revenue as directly tied to the entered ad spend.
- ROAS is a revenue metric only and does not subtract product cost, overhead, or returns.
- If ad spend is zero or negative, ROAS is undefined rather than free.
Unit handling
- Ad Spend accepts values in $.
- Ad Revenue accepts values in $.
- ROAS % is displayed as a percentage.
Rounding rules
- Number displays use up to 2 decimal places in the calculator UI.
- Percent outputs are displayed with two decimal places.
Version history
1.0.0 - 2026-05-06
Generated accuracy and testing page from the current roas-calculator calculator definition.
Change log
2026-05-06
Published default regression test documentation and metadata fallbacks for ROAS Calculator.
Calculator transparency
Accuracy pages are generated from checked-in calculator definitions and can be upgraded with curated review metadata over time.