Turn email metrics into real revenue math.
See how list size, open rate, click rate, conversion rate, average order value, and tool cost translate into revenue per send and monthly email ROI.
Email marketing ROI calculator
Enter your list and campaign metrics. Results update as you type.
What email ROI includes
This calculator estimates opens, clicks, conversions, revenue per send, revenue per subscriber, and monthly ROI. The monthly ROI assumes four sends per month to match the source calculator logic.
Revenue per subscriber
RPS is the fastest health check for an email list. A small list with high RPS can beat a huge cold list because engagement, segmentation, and buying intent matter more than vanity size.
Fix the bottleneck
- Low opens: subject lines and list hygiene
- Low clicks: offer and CTA clarity
- Low conversions: landing page or product fit
- Low ROI: reduce tool costs or improve AOV
How to read the email ROI numbers
This calculator turns email campaign metrics into a revenue model. Opens are calculated from list size and open rate. Clicks are calculated from opens and click rate. Conversions are calculated from clicks and conversion rate. Revenue per send is conversions multiplied by average order value.
The monthly ROI line follows the source ProfitToolsLab formula exactly: it assumes four sends per month, subtracts your monthly email platform cost, then divides by that monthly cost. That keeps the calculator simple enough for quick planning while still showing whether your list is pulling its weight.
Use revenue per subscriber as the main quality signal. If open rate is weak, fix subject lines and list hygiene. If clicks are weak, sharpen the offer and call to action. If conversions are weak, the landing page, price, or product fit may be the real problem.
For better planning, rerun the calculator with pessimistic, expected, and optimistic inputs. The spread between those three scenarios is usually more useful than pretending a single forecast is gospel.
Small changes compound fast, so save a baseline before changing offers, prices, automations, or ad budgets.
Ready to make the list pay for itself?
Once you know your email ROI, the next move is better segmentation, automations, and cleaner campaign reporting. Email platforms like Mailchimp, ConvertKit, and Klaviyo are built for that work.