Influencer Marketing ROI Calculator
Estimate reach, conversions, ROI, and ROAS from an influencer campaign.
How this is calculated
Starting from the influencer's follower count, this calculator applies a 30% organic reach rate (the industry-average share of followers who see a given post), then the engagement rate to estimate interactions, then the conversion rate to estimate purchases. Revenue is conversions times average order value, and ROI/ROAS compare that revenue against the campaign cost.
Don't know your engagement rate? The Engagement Rate Calculator will calculate it and pass it here automatically.
Frequently asked questions
- What is ROAS?
- Return on ad spend — revenue divided by campaign cost. A ROAS of 2× means every $1 spent generated $2 in estimated revenue.
- What conversion rate should I use?
- This varies a lot by product and offer, but 0.5-3% of engaged users converting to a purchase is a typical range for influencer campaigns. Use your own historical data if you have it.
- What reach rate does this assume?
- This calculator assumes 30% organic reach — the industry-average share of an influencer's followers who actually see a given post, based on typical algorithmic distribution.
- How do I calculate ROI?
- ROI = (revenue − cost) / cost × 100, expressed as a percentage. It differs from ROAS, which is simply revenue divided by cost without subtracting the cost first.
- Can I use this in my own app?
- Yes — every calculator on Stupidly Clever has a matching REST API and MCP tool that runs the same underlying logic.