Free online calculator
ROAS Calculator
Measure attributed advertising revenue per unit of ad spend. Includes a worked example, formula and practical FAQs.
Formula: ROAS = revenue attributed to ads ÷ ad spend
How to use the ROAS Calculator
Measure attributed advertising revenue per unit of ad spend. Enter revenue attributed to the campaign and spend for a matching reporting and attribution window.
Formula
ROAS = attributed revenue ÷ ad spend; ROAS percentage = ROAS × 100.
Worked example
$2,000 attributed revenue from $500 spend gives 4× ROAS, or 400%.
Interpretation and limitations
Ad spend must be positive. ROAS measures revenue efficiency, not profit; product costs, refunds, taxes and overhead can change profitability. Attribution across channels can double-count sales.
ROAS questions
Does 4× ROAS mean 400% profit?
No. It means $4 of attributed revenue per $1 spent. Profit depends on all other costs.
What ROAS is profitable?
There is no universal threshold. Use your contribution margin to estimate break-even ROAS, then consider fixed costs and attribution quality.
Continue your calculation
For the next step, use the Break-Even ROAS Calculator or the ROI Calculator. Review each tool’s input definitions before carrying a result into another calculation.
Frequently asked questions
Is this calculator free?
Yes. It runs in your browser and does not require an account.
How should I use the result?
Use the result as a planning estimate and verify business-critical decisions against your source records.