Paid Search ROI Calculator
This calculator measures the return on your paid search investment (Google Ads, Microsoft Advertising, and other PPC platforms). Enter your total ad spend, number of clicks, conversion rate, and average order value. The calculator computes your total revenue, ROAS (return on ad spend), and net profit ROI after accounting for your gross margin. Use the break-even ROAS output to set your minimum acceptable campaign performance threshold.
Paid search ROI formulas
Conversions = Clicks x (Conversion Rate / 100)
Revenue = Conversions x Average Order Value
ROAS = Revenue / Ad Spend
Break-Even ROAS = 1 / (Gross Margin / 100)
Profit ROI (%) = (Gross Profit - Ad Spend) / Ad Spend x 100
If your ROAS is below your break-even ROAS, the campaign is losing money despite generating revenue. Gross profit ROI is the definitive profitability measure.
How to improve paid search ROI
- Raise your Quality Score by improving ad relevance and landing page experience, which lowers your cost per click.
- Use negative keywords to exclude irrelevant traffic that generates clicks but no conversions.
- Test different ad headlines and descriptions to improve click-through rate.
- Optimize landing pages for conversion rate through A/B testing of headlines, CTAs, and form length.
- Use bid adjustments by device, location, and time of day to focus spend on your best-converting segments.
Paid search ROI: frequently asked questions
What is ROAS and how does it differ from ROI?
ROAS (return on ad spend) is revenue divided by ad spend. It tells you how many dollars of revenue each dollar of ad spend generates. ROI goes further by accounting for product costs and margins, telling you whether the campaign was actually profitable. A 4x ROAS may still be unprofitable if your gross margin is 20%.
What ROAS do I need to break even?
Your break-even ROAS equals 1 divided by your gross margin. If your gross margin is 40% (0.40), you need a ROAS of at least 2.5x to cover cost of goods and ad spend. Any ROAS above that generates profit.
What is a good conversion rate for paid search?
Average Google Ads conversion rates vary widely by industry: retail averages around 2-4%, finance 5-8%, and B2B software 3-5%. WordStream publishes industry benchmarks annually based on aggregate Google Ads data.
How do I improve paid search ROI?
Focus on quality score improvements (ad relevance, expected CTR, landing page experience), add negative keywords to cut wasted spend, test ad copy for higher CTR, optimize landing pages for conversion rate, and use audience targeting to reach higher-value users.
Should I include agency or management fees in my ad spend?
Yes. For an accurate ROI calculation, include all costs: media spend, agency management fees, creative production costs, and any platform tool subscriptions. Omitting management fees overstates your ROI.
Official sources
- Federal Trade Commission: Advertising and Marketing Guidelines.
- U.S. Small Business Administration: Marketing and Sales.
Reviewed by the CalculatorHub team, edited by James Graham, 14 June 2026. See our methodology.