What Is Return on Ad Spend?
Return on ad spend (ROAS) measures the revenue generated for every unit of currency spent on advertising. It gives marketers and business owners a quick way to compare campaigns, channels, audiences, and creative assets.
Use the ROAS Calculator to calculate your result instantly.
The ROAS Formula
ROAS = Revenue attributed to ads ÷ Advertising cost
If a campaign costs $2,000 and generates $8,000 in revenue, its ROAS is 4x, or 400%. In practical terms, every dollar of ad spend returned four dollars in revenue.
Does a High ROAS Always Mean Profit?
No. ROAS compares revenue with advertising cost only. It does not deduct inventory, shipping, payment fees, salaries, discounts, or overhead. A campaign can report an attractive ROAS and still lose money when gross margin is low.
Calculate Your Break-Even ROAS
Divide 1 by your gross margin expressed as a decimal. With a 40% margin, break-even ROAS is 1 ÷ 0.40 = 2.5x. The campaign must generate more than $2.50 for every $1.00 spent before it produces a contribution profit.
How to Evaluate Campaigns Correctly
- Match revenue and ad spend from the same reporting period.
- Use consistent attribution windows when comparing platforms.
- Check actual sales data to avoid double-counted conversions.
- Review ROAS alongside gross margin, CPA, ROI, and customer lifetime value.
- Wait for a meaningful conversion sample before making major decisions.
Enter your campaign figures in the free ROAS Calculator to see ROAS, ROI, net profit, and break-even performance together.