Return on Ad Spend
ROAS Calculator
ROAS is short for Return on Ad Spend. Enter ad spend and attributed ad revenue from the same period to calculate it as a multiplier and percentage.
ROAS Calculator
Edit either value for an instant result
Example values are shown. Replace them with your own campaign numbers.
Use the same time period and currency for both inputs.
The amount paid for ads during the selected period.
Revenue attributed to those ads during the same period.
Your ROAS
Every $1 spent brought in $5 in attributed revenue.
ROAS measures revenue efficiency, not profit. Product costs, fees, and overhead are not included.
Before you calculate
Use numbers that describe the same campaign scope
A correct formula can still give a misleading answer when the inputs cover different dates, currencies, or attribution rules.
Match the time period
Compare spend and attributed revenue from the same day, week, month, or reporting window.
Match the currency
Convert both values to one currency before calculating. ROAS is a ratio, so the currency symbol does not change the result.
Keep attribution consistent
Use revenue credited to the ads under one attribution method. Do not mix total store revenue with campaign spend.
Formula and example
Attributed ad revenue ÷ ad spend = ROAS
The multiplier and percentage are two ways to express the same result. Multiply the ROAS ratio by 100 to show it as a percentage.
Attributed revenue
$5,000
÷ Ad spend
$1,000
= ROAS
5.00× / 500%
$5,000 ÷ $1,000 = 5.00× ROAS. The same result is 500% ROAS, or $5 in attributed revenue for every $1 spent.
What ROAS can—and cannot—tell you
Use ROAS to read advertising revenue efficiency. Do not treat it as a complete profit calculation.
ROAS can help you
- Measure attributed revenue returned per unit of ad spend.
- Compare campaigns that use the same scope and attribution rules.
- Spot changes in revenue efficiency over time.
ROAS cannot tell you
- Whether the campaign is profitable after product costs, fees, returns, shipping, tax, and overhead.
- Whether the source platform credited every sale correctly.
- A universal good or bad target; your profitable floor depends on your margins and costs.
ROAS vs. ROI
ROAS isolates advertising revenue efficiency. ROI needs profit and a broader cost base, so the two metrics answer different questions.
ROAS — advertising efficiency
Attributed revenue ÷ ad spend
Use it to compare how much attributed revenue your ads return. This calculator has the two inputs needed for that job.
ROI — return on investment
Profit ÷ total investment × 100
Use it to judge profitability after all relevant revenue and costs. Ad spend and attributed revenue alone are not enough to calculate ROI.
After you calculate
Choose the next question you need to answer
Find your profitable floor
Use gross margin to calculate the minimum ROAS needed to cover your costs.
Plan around a target
Convert a target ROAS into the spend or revenue needed for a campaign plan.
Apply platform context
Use the same core formula with labels and guidance for the platform you report from.
Method and trust
A small calculation with clear limits
The calculator runs one published formula. It does not grade your result, estimate profit, or send your campaign values to a server.
Official definition
Google Ads defines ROAS as total conversion value divided by total spend and represents it as a percentage.
Read the Google Ads glossaryScope
This page calculates basic ROAS from attributed ad revenue and ad spend. It does not calculate incremental ROAS, profit, or ROI.
Local calculation
The calculation happens in your browser. The values entered in these fields are not submitted to this site.
Reviewed
Last updated July 20, 2026. Formula and page boundaries reviewed against the linked Google Ads definition.