ROAS Calculator
Calculate attributed revenue per unit of ad spend and a simplified break-even ratio from contribution margin.
About this roas calculator
Calculate attributed revenue per unit of ad spend and a simplified break-even ratio from contribution margin.
How this tool works
ROAS divides attributed revenue by ad spend. Revenue 600 and spend 200 give 3×, or 300% of spend. At contribution margin 40%, the simplified break-even ROAS is 100 / 40 = 2.5×.
- Set these visible inputs: Revenue ($) = 600; Ad spend ($) = 200; Contribution margin (%) = 40
- Read the automatically updated result and compare it with the example.
Worked example
Scenario: Set these visible inputs: Revenue ($) = 600; Ad spend ($) = 200; Contribution margin (%) = 40 Read the automatically updated result and compare it with the example.
Sample input:
Illustrative output:
Limits and verification
Revenue must be nonnegative and spend positive; margin must be above 0% and at most 100%. Unrepresentable ratios show no numeric result. This is revenue return, not profit: attribution, refunds and variable costs change the margin; currencies must match. Results use floating-point arithmetic. Ordinary values show up to two decimal places; small and large values use scientific notation with seven significant digits.
Examples demonstrate an expected workflow; they do not prove every input or every branch of an external specification. Check important results with an independent source before using them for money, security, compliance, safety, or irreversible file changes.
Browser processing boundary
Tool input is processed by code running in the browser and is not intentionally sent to a CZOA processing API. The page can still request ordinary site assets, analytics, or advertising when those services are enabled. Browser extensions and managed-device software remain outside this tool's control.
Relevant references
These references govern or help explain the format, protocol, or calculation used here. Listing a reference does not claim certification or complete implementation of every optional feature.
- Google Ads Help: Target ROAS, answer 6268637; attributed conversion value divided by advertising cost
- Simplified break-even derivation: revenue × contribution margin = advertising cost; fixed costs excluded
Content owner: CZOA Tools · Review methodology
How to use it
- Set these visible inputs: Revenue ($) = 600; Ad spend ($) = 200; Contribution margin (%) = 40
- Read the automatically updated result and compare it with the example.
Frequently asked questions
ROAS: How is this result calculated?+
ROAS divides attributed revenue by ad spend. Revenue 600 and spend 200 give 3×, or 300% of spend. At contribution margin 40%, the simplified break-even ROAS is 100 / 40 = 2.5×.
ROAS: Which inputs reproduce this example?+
Set these visible inputs: Revenue ($) = 600; Ad spend ($) = 200; Contribution margin (%) = 40
ROAS: What input and precision limits apply?+
Revenue must be nonnegative and spend positive; margin must be above 0% and at most 100%. Unrepresentable ratios show no numeric result. This is revenue return, not profit: attribution, refunds and variable costs change the margin; currencies must match. Results use floating-point arithmetic. Ordinary values show up to two decimal places; small and large values use scientific notation with seven significant digits.
ROAS: How should I interpret the example output?+
3×; 300%; 2.5× — ROAS divides attributed revenue by ad spend. Revenue 600 and spend 200 give 3×, or 300% of spend. At contribution margin 40%, the simplified break-even ROAS is 100 / 40 = 2.5×.