Free tool
Marketing ROI Calculator
Estimate return on a campaign from spend, revenue, and (optionally) new customers. A simple arithmetic check, not a forecast.
ROI here is (revenue − spend) ÷ spend. It only helps if you are honest about what revenue you can actually attribute to the campaign.
Arithmetic, not a promise
Profit is revenue minus spend. ROI is that profit over spend. Cost per customer needs a customer count you can stand behind.
FAQ
Is this a forecast?
No. It divides the numbers you type. Garbage in, garbage out.