Enter your email campaign’s cost and revenue to get ROI, profit and revenue per email — the metrics that justify the channel.
What Is Email ROI?
An email ROI calculator measures the return on an email campaign: ($8,000 − $500) ÷ $500 = 1,500.00% ROI, $7,500.00 profit, $0.40 per email. Email’s famous ROI ($36–42 per $1 in industry studies) comes from near-zero marginal cost — but only if the list is permission-based and the offer converts. This tool turns your own campaign numbers into the three metrics that matter.
How to Use
- Enter total campaign cost (platform + creative).
- Enter revenue attributed to the campaign.
- Enter emails sent.
- Click “Calculate ROI”.
Formula
Profit = revenue − cost. ROI = 100 × profit ÷ cost. Revenue per email = revenue ÷ emails.
Worked Example
$500 cost, $8,000 revenue, 20,000 emails: profit $7,500.00; ROI 1,500.00%; revenue per email $0.40.
How It Works, In Plain Words
Three inputs, three outputs, in a fixed order. Profit comes first: revenue minus cost, because ROI is built on profit, not on revenue. In the worked example that is $8,000 − $500 = $7,500.00. ROI comes second: 100 × profit ÷ cost, which expresses the profit as a multiple of the spend — $7,500 ÷ $500 is 15, shown as 1,500.00%. Revenue per email comes third and ignores cost entirely: revenue ÷ emails sent, $8,000 ÷ 20,000 = $0.40. The inputs map to the How to Use steps: cost is the total campaign cost (the steps specify platform plus creative), revenue is the revenue attributed to the campaign — attributed being the operative word, as the attribution FAQ below explains — and emails sent is the volume that turns the totals into a per-message figure.
Why three outputs instead of one? Because they fail differently. ROI explodes when cost is tiny, which is normal for email — the introduction notes the near-zero marginal cost behind the channel’s famous returns — so ROI alone can flatter a campaign that made very little money. Profit anchors it in actual currency. Revenue per email anchors it differently again: the FAQ calls it the health metric of a list, because it can be compared across campaigns of different sizes where totals cannot. A campaign can therefore look brilliant on one line and ordinary on another, and reading all three together is the honest way to use the tool.
Real-World Uses
A marketer justifying the email budget — the use the benefits list names — runs each campaign through the tool and tables profit and ROI side by side: the $500-to-$8,000 shape of the worked example is exactly the evidence a budget holder asks for, and it comes from the team’s own numbers rather than the industry studies the FAQ quotes. A shop owner compares two sends of different sizes: the totals favour the bigger list, but revenue per email — $0.40 in the example — shows which message actually earned its place, list health being comparable where totals are not. A freelancer reporting to a client uses the attribution FAQ as the ground rule: UTM-tagged links or a unique coupon code decide the revenue figure before it is typed in, so the ROI conversation is about an agreed number, not an argument.
Benefits
- ROI, profit and per-email revenue in one tool
- Honest about attribution (the hard part)
- Currency-neutral
- Useful for justifying the email budget
Features of Our Tool
- Instant results in your browser
- No sign-up, no download, 100% free
- Works on mobile, tablet and desktop
- Clear step-by-step explanation below the tool
- Private — your entries never leave your device
Common Mistakes
- Claiming full revenue for email when other channels assisted — use attribution
- Ignoring list costs (acquisition, platform) in the cost
- Comparing ROI across channels without context (email’s marginal cost is near zero)
Common Mistakes to Avoid
The mistakes list covers claiming full revenue when other channels assisted, ignoring list costs, and comparing ROI across channels without context. In prose, add three more. Do not mix attribution methods between campaigns: the FAQ’s advice is to pick one method and stay consistent, because a last-click campaign and a coupon-code campaign are not measuring the same revenue. Do not shrink the cost to make ROI look heroic — the tool refuses a cost of zero outright, and a cost that omits the platform and creative the How to Use steps include inflates the percentage just as surely. And do not read revenue per email as profit per email: it divides revenue before any cost has been subtracted.
FAQ
What is email ROI?
(Revenue − cost) ÷ cost × 100 — here 1,500.00%.
Is email marketing worth it?
Usually yes — industry studies show $36–42 per $1 spent, but your numbers depend on list quality and offer.
How do I attribute revenue to email?
UTM-tagged links, unique coupon codes, or last-click in your analytics — pick one method and stay consistent.
What is revenue per email?
Total revenue ÷ emails sent — $0.40 here; the health metric of a list.
Why is email ROI so high?
Near-zero marginal cost per send — but only with a permission-based, engaged list.
What ROI do I get if revenue equals cost?
0%. Profit is revenue minus cost, so equal figures give zero profit, and 100 × 0 ÷ cost is 0% however large the campaign. The worked example sits at the other end of the scale: $7,500.00 of profit on $500 of cost is the 1,500.00% the tool shows.
Why does the tool need emails sent if ROI ignores it?
ROI and profit use only cost and revenue; the emails figure exists for the third output, revenue per email — $8,000 ÷ 20,000 = $0.40 in the worked example. It is the figure that lets you compare a small send with a large one fairly, which is why the FAQ above calls it the health metric of a list.