This free email marketing ROI calculator from Nemin.io estimates how much revenue an email campaign can generate and whether it will pay for itself. Enter your list size, open rate, click rate, conversion rate, average order value and campaign cost to see estimated revenue, ROI and number of orders.
Use it to plan campaigns, set realistic goals or understand which part of your email funnel to improve first. It’s free and works in your browser.
Email Marketing ROI Calculator: Estimate Campaign Returns
Fill in the fields and click Calculate.
How the Nemin.io Email Campaign ROI Calculator Works
- Opens = list size × open rate
- Clicks = opens × click rate
- Orders = clicks × conversion rate
- Revenue = orders × average order value
- ROI = (revenue − campaign cost) ÷ campaign cost × 100
Important: the click rate is applied to opens, not to the whole list, so it works as a click-to-open rate (CTOR). Many email platforms report click-through rate against all delivered emails, which is a smaller number. Use your click-to-open rate here, or work it out as clicks ÷ opens.
Worked Example
A 10,000-person list with a 25% open rate, 4% click rate, 3% conversion rate, $60 order value and $200 cost gives 2,500 opens, 100 clicks, 3 orders, $180 in revenue and an ROI of −10%. With a 15% click-to-open rate instead, clicks rise to 375, revenue to $675 and ROI to 237.5%, which shows how much the click stage matters.
How to Use the Nemin.io Email Campaign ROI Calculator
- Enter Email list size.
- Enter Open rate (%).
- Enter Click rate (% of opens).
- Enter Conversion rate (%).
- Enter Average order value ($).
- Enter Campaign cost ($).
- Click Calculate ROI to see your results instantly.
- Change one input at a time to compare scenarios, then click Reset to start again.
The Email Campaign ROI Calculator runs entirely in your browser, so you can test as many scenarios as you like.
Which Part of the Funnel to Improve First
- Low opens: work on subject lines, sender name, send time and list quality.
- Low clicks: improve the offer, the email layout and a single, clear call to action.
- Low conversions: check the landing page, checkout process and that the page matches the email.
- Low order value: consider bundles, upsells or free-shipping thresholds.
Change one input at a time in the calculator to see which improvement has the biggest effect on revenue.
Why List Quality Beats List Size
A larger list doesn’t always mean more revenue. Inactive or purchased contacts lower open rates, can hurt deliverability and add sending costs. A smaller, engaged list often produces better results. Regularly removing unengaged contacts and growing your list with people who opted in tends to improve every stage of the funnel.
How Click-to-Open Rate Changes Results
Keeping the worked example’s list size, open rate, conversion rate, order value and cost the same, here’s what happens as the click-to-open rate improves:
| Click-to-open rate | Clicks | Orders | Revenue | ROI |
|---|---|---|---|---|
| 4% | 100 | 3 | $180.00 | -10.00% |
| 8% | 200 | 6 | $360.00 | 80.00% |
| 12% | 300 | 9 | $540.00 | 170.00% |
| 15% | 375 | 11 | $675.00 | 237.50% |
Better subject lines raise opens; a clearer offer and call to action raise clicks. Both multiply through to revenue.
Who the Email Campaign ROI Calculator Is For
- Ecommerce businesses planning promotions
- Email marketers forecasting campaign revenue
- Agencies setting goals for client campaigns
- Creators selling products to their audience
- Anyone deciding whether an email campaign is worth the cost
What to Include in Campaign Cost
- Email platform fees for the campaign
- Design and copywriting
- Discounts or incentives offered
- Agency or freelancer fees
- Staff time
Using Results to Plan Future Campaigns
After each campaign, replace the estimates with your real open, click and conversion rates. Over a few campaigns you’ll build reliable benchmarks for your own list, which makes future revenue forecasts much more accurate than industry averages.
Key Terms Explained
- Open rate: The share of recipients who open the email.
- Click-to-open rate: Clicks divided by opens.
- Click-through rate: Clicks divided by delivered emails.
- Conversion rate: The share of clickers who complete a purchase or goal.
- Average order value: The average amount spent per order.
Tips for Accurate Email Campaign ROI Calculator Results
- Use your click-to-open rate, not click-through rate.
- Base rates on your last few campaigns, not industry averages.
- Include discounts in campaign cost.
- Test one funnel change at a time.
Related Free Calculators
Email is one channel among several; compare it with your other campaigns. Try the Nemin.io ROI Calculator, the Nemin.io Google Ads Budget Calculator and the Nemin.io Social Media Pricing Calculator. All of them are free and work the same way as the Email Campaign ROI Calculator, so you can move from one question to the next in seconds.
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Email Marketing ROI Calculator FAQs
Is the Nemin.io email campaign ROI calculator free?
Yes. It’s free and works in your browser without an account.
What click rate should I enter?
Enter your click-to-open rate, because the calculator applies clicks to opens rather than to the whole list.
How is email revenue estimated?
Opens × click rate × conversion rate × average order value.
Why is my ROI negative?
The estimated revenue is lower than the campaign cost. Try improving the click or conversion stage, or lowering costs.
Can I use this for newsletters without direct sales?
Yes, if you can assign a value to each conversion, such as a lead or booking.
Does the calculator store my data?
No. The calculation runs in your browser.
How do you calculate email marketing ROI?
ROI = (revenue from the campaign − campaign cost) ÷ campaign cost × 100. Campaign cost should include your email platform fees, design and copywriting time and the cost of any incentives you offer. The calculator estimates revenue from your list size, open, click and conversion rates and average order value, then applies this formula.
What is a good email open rate?
It varies by industry, audience and how the list was built, so your own past campaigns are the best benchmark. Open rates have also become less reliable since privacy features such as Apple Mail Privacy Protection began loading emails automatically, which can inflate opens. Clicks and conversions are usually better measures of results.
What is click-to-open rate?
Click-to-open rate (CTOR) is the share of people who opened an email and then clicked a link: clicks ÷ opens × 100. The calculator’s click rate field uses this definition, because it’s entered as a percentage of opens.
How can I improve email marketing ROI?
Common levers are segmenting your list so people get relevant emails, removing inactive addresses, testing subject lines and calls to action, making emails easy to read on mobile and sending people to a landing page that matches the email. Improving any stage of the funnel raises revenue for the same cost.
