Free tool
Email Marketing ROI Calculator
Estimate what an email campaign is worth from end to end. Enter your sends, open rate, click-to-open rate, conversion rate, order value and cost to project opens, clicks, revenue and ROI.
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Updates as you typeClicks ÷ opens
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Result
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The email marketing ROI formula
Opens = Emails sent × Open rateClicks = Opens × Click-to-open rateConversions = Clicks × Conversion rateRevenue = Conversions × Average order valueROI = (Revenue − Campaign cost) ÷ Campaign cost × 100Click-to-open rate is used deliberately — clicks are calculated from opens, not from every email delivered, so the funnel stays mathematically honest.
Example calculation
Send 10,000 emails at a 40% open rate and 10%click-to-open rate: that is 4,000 opens and 400 clicks. At a 5% conversion rate you get 20 sales; at an $80 order value that is $1,600revenue. Against a $500 cost, ROI is (1,600 − 500) ÷ 500 × 100 = 220%.
What this calculator tells you
It turns email — which can feel vague — into a clear funnel. You see exactly where people drop off, from opens to clicks to sales, and whether the campaign returns more than it costs.
Common mistakes
- Entering a standard CTR where a click-to-open rate belongs.
- Using optimistic rates the list has never actually produced.
- Ignoring the cost of tools, design and time in campaign cost.
When this number is misleading
This is an estimate built on averages. Real campaigns are affected by deliverability, list fatigue, timing and how well the offer fits. A great projected ROI means nothing if emails land in spam or the list is stale. Treat the result as a planning guide, then validate it against what your sends actually do.
How to improve this metric
- Grow and regularly clean your list to protect deliverability.
- Write subject lines that earn the open.
- Lead with one clear, relevant offer and call to action.
- Segment and follow up so the right people get the right message.
The number tells you where you are. Not what to do next.
Email ROI shows the potential — consistent, well-timed campaigns unlock it.
Cleverlio decides what your business should do this week and writes the work — the posts, the messages, the website copy. You review it and publish it yourself.
See what Cleverlio would doCommon questions
What is email marketing ROI?
It is the return your email campaign generates relative to its cost. This tool estimates it by walking from emails sent through opens, clicks, conversions and revenue, then comparing that revenue to your campaign cost.
What is the difference between click-to-open rate and CTR?
Click-to-open rate is clicks divided by opens — how compelling your email is to the people who actually opened it. Standard email CTR is clicks divided by delivered emails. This calculator uses click-to-open rate on purpose, because it is applied to opens, so the math stays honest.
Why does the calculator use click-to-open rate instead of CTR?
Because clicks here are calculated from opens, not from everyone who received the email. Multiplying opens by a true CTR would double-count the open step. Using click-to-open rate keeps each stage of the funnel consistent.
What rates should I enter?
Use your own campaign data if you have it. If you are estimating, be conservative: open rates and conversion rates vary a lot by list quality, offer and audience. Your real numbers will always beat a generic benchmark.
How do I improve email marketing ROI?
Grow and clean your list, improve deliverability, write subject lines that earn opens, make one clear offer, and follow up consistently. ROI depends heavily on list quality and offer strength, not just send volume.