The ROAS formula is one of the simplest paid marketing formulas: revenue from ads divided by ad spend. It helps you see how much revenue a campaign produced for each dollar spent. Simple formulas are useful, but they still need clean inputs.
If you want the result instantly, use our free ROAS Calculator. If you are building a report, spreadsheet, or client dashboard, understanding the formula will help you explain the number with confidence.
The ROAS formula
ROAS = Revenue from ads / Ad spend
If ads cost $2,000 and generate $8,000 in revenue, the formula is $8,000 divided by $2,000. The result is 4x ROAS.
ROAS percentage formula
Some reports show ROAS as a percentage. To calculate ROAS percentage, multiply the ROAS result by 100. A 4x ROAS becomes 400 percent. A 2.5x ROAS becomes 250 percent. The meaning is the same; only the format changes.
Ad spend formula basics
For most campaigns, ad spend is the total cost shown in the platform. If you are combining platforms, add each cost together. For example, Google Ads spend plus Facebook Ads spend equals total ad spend for a blended ROAS review.
Real example
A campaign spends $600 and records $1,800 in revenue. The ROAS formula is $1,800 divided by $600, which equals 3x. As a percentage, the same result is 300 percent.
That tells you revenue is three times ad spend, but it does not tell you final profit. If product costs are high, a 3x ROAS may be weak. If margins are strong, it may be healthy.
Common mistakes
- Using clicks or conversions instead of revenue in the formula.
- Mixing media spend with total business costs without explaining it.
- Reporting ROAS percentage and ROAS multiple as if they are different metrics.
- Ignoring margin when deciding whether the result is good.
Conclusion
The ROAS formula is easy to learn and useful in everyday campaign reporting. Use it to compare ad efficiency, then pair it with profit margin, CPA, and conversion volume before making major budget changes.
CTA: Try our free ROAS Calculator.