Marketing ROI Engine

Email Marketing ROI Calculator

Calculate projected revenue, ROI, cost per acquisition, and break-even conversion rate for your email marketing campaigns.

Campaign Results

Projected Revenue

$264.00

Negative ROI

ROI

-47%

Profit

-$236.00

Cost per Acquisition

$151.52

Revenue / Subscriber

$0.03

Opens

2,200

Clicks

Conversions

Revenue vs Campaign Cost

Projected revenue, cost, and profit per campaign

Revenue

$264.00

Campaign Cost

$500.00

Profit

-$236.00

Break-even conversion rate: 9.47% of clicks. Improve conversion rate or reduce campaign cost to reach profitability.

Unsubscribes this campaign: 50 — list size after: 9,950

How to use it

Enter your email list size, open rate, click-through rate of opens, conversion rate of clicks, average order value, total campaign cost (including design and tool fees), and expected unsubscribe rate.
Read projected revenue, ROI, profit, cost per acquisition, revenue per subscriber, and break-even conversion rate. The break-even conversion rate tells you the minimum click-to-purchase rate needed to cover costs.
Interpret the revenue vs cost chart to see if the campaign is structurally profitable or marginal. If CPA exceeds AOV, the campaign is loss-making at current rates regardless of volume.
Act on the output by fixing the weakest funnel stage first. A low open rate is a subject-line and deliverability problem. Low CTR is a copy or offer problem. Low conversion rate is a landing page or checkout problem.
Re-run before each campaign with updated list health metrics. Track revenue per subscriber over time — a declining RPS is an early signal that list quality is degrading or the offer is fatiguing the audience.

AI Integrations

Contract, discovery endpoints, and developer notes for agent use.

Always available for agents

Tool contract JSON

https://aibizhub.io/contracts/email-marketing-roi-calculator.json

Stable input and output contract for this exact tool.

Human review

People can use the browser page to sense-check outputs and charts, but agents should still execute against the contract and discovery endpoints.

/agent-tools.json - machine-readable tool index.
/llms.txt - human-readable model discovery guide.
/.well-known/webmcp.json - WebMCP capabilities manifest.
/.well-known/ai-plugin.json - plugin-style discovery manifest.

{
  "tool": "email_marketing_roi_calculator",
  "list_size": 10000,
  "open_rate_percent": 22,
  "click_through_rate_percent": 3,
  "conversion_rate_percent": 5,
  "average_order_value": 80,
  "campaign_cost": 500,
  "unsubscribe_rate_percent": 0.5
}

Open tool contract JSON Open AI integrations guide

Expand developer notes

Agent playbook

Resolve Email Marketing ROI Calculator from /agent-tools.json and open its contract before execution.
Validate inputs against the contract schema instead of scraping labels from the page UI.
Open the browser page only when a person wants to review charts, assumptions, or related tools.

Agent FAQ

Should ChatGPT, Claude, or another agent click through the UI?

No. Start with /agent-tools.json, then follow the tool's contract URL. The page UI is for human review, not parameter discovery.

When do tools show Quick and Advanced?

Every tool opens in Quick Start first. Advanced Controls keeps the same scenario, reveals more assumptions or diagnostics, and every tool keeps AI integrations inline below the instructions.

When should an agent still open the browser page?

Open it when a human wants to sense-check the output, review the chart, or keep exploring related tools after the calculation finishes.

Questions people usually ask

What is email marketing ROI?

Email marketing ROI is the net profit from a campaign divided by the total campaign cost, expressed as a percentage. The industry average email marketing ROI is often cited at 3600-4200% ($36-42 per $1 spent), though this varies widely by list quality and offer.

What are good open and click-through rates?

Industry averages: open rate 20-25%, CTR (of opens) 2-5%. Rates above these suggest a high-quality list and relevant content. Rates well below average often indicate deliverability problems or a misaligned audience.

How is break-even conversion rate calculated?

Break-even conversion rate = (Campaign Cost ÷ Average Order Value) ÷ Total Clicks × 100. It tells you the minimum percentage of people who click that must purchase to cover your campaign costs.

What is cost per acquisition in email marketing?

CPA = Campaign Cost ÷ Total Conversions. It measures how much you spent to generate each sale or lead. Compare this to your product margin and customer LTV to determine if the campaign is profitable at scale.

Is this tool free and private?

Yes. AI Biz Hub tools run entirely in your browser with no signup required. Inputs stay local unless you share the URL.

Is this professional advice?

No. Outputs are planning estimates only. Real campaign results depend on list health, deliverability, and offer quality.

Related Resources

Learn the decision before you act

Every link here is tied directly to Email Marketing ROI Calculator. Use the explanation, formula, examples, and benchmarks to pressure-test the calculator output from first principles.

Browse all 3 resources

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