function calculateEmailROI() {
// Retrieve inputs using var
var listSize = parseFloat(document.getElementById('listSize').value);
var campaignCost = parseFloat(document.getElementById('campaignCost').value);
var openRate = parseFloat(document.getElementById('openRate').value);
var ctr = parseFloat(document.getElementById('ctr').value);
var conversionRate = parseFloat(document.getElementById('conversionRate').value);
var aov = parseFloat(document.getElementById('aov').value);
// Validation
if (isNaN(listSize) || isNaN(campaignCost) || isNaN(openRate) || isNaN(ctr) || isNaN(conversionRate) || isNaN(aov)) {
alert("Please fill in all fields with valid numbers.");
return;
}
// Calculations
// 1. Total Opens
var totalOpens = listSize * (openRate / 100);
// 2. Total Clicks (based on opens)
var totalClicks = totalOpens * (ctr / 100);
// 3. Total Conversions (based on clicks)
var totalConversions = totalClicks * (conversionRate / 100);
// 4. Total Revenue
var totalRevenue = totalConversions * aov;
// 5. Net Profit
var netProfit = totalRevenue – campaignCost;
// 6. ROI Percentage
var roiPercent = 0;
if (campaignCost > 0) {
roiPercent = (netProfit / campaignCost) * 100;
} else {
roiPercent = totalRevenue > 0 ? 10000 : 0; // Edge case for 0 cost
}
// 7. CPA (Cost Per Acquisition)
var cpa = 0;
if (totalConversions > 0) {
cpa = campaignCost / totalConversions;
}
// Display Results
var resultDiv = document.getElementById('results');
resultDiv.style.display = 'block';
document.getElementById('projectedRevenue').innerText = '$' + totalRevenue.toLocaleString('en-US', {minimumFractionDigits: 2, maximumFractionDigits: 2});
var profitEl = document.getElementById('netProfit');
profitEl.innerText = '$' + netProfit.toLocaleString('en-US', {minimumFractionDigits: 2, maximumFractionDigits: 2});
if (netProfit >= 0) {
profitEl.className = 'result-value roi-positive';
} else {
profitEl.className = 'result-value roi-negative';
}
document.getElementById('cpa').innerText = '$' + cpa.toLocaleString('en-US', {minimumFractionDigits: 2, maximumFractionDigits: 2});
document.getElementById('totalConversions').innerText = Math.round(totalConversions);
var roiEl = document.getElementById('roiResult');
roiEl.innerText = roiPercent.toFixed(2) + '%';
if (roiPercent >= 0) {
roiEl.className = 'result-value roi-positive';
} else {
roiEl.className = 'result-value roi-negative';
}
}
Understanding Email Marketing ROI
Email marketing remains one of the most effective digital marketing channels, consistently offering a high Return on Investment (ROI) compared to social media or paid search. However, measuring the success of a campaign requires looking beyond just open rates. This Email Marketing ROI Calculator helps marketers quantify the financial impact of their campaigns by analyzing the funnel from subscriber to sale.
How to Calculate Email ROI
To accurately calculate the return on your email marketing efforts, you need to understand the relationship between your list size, engagement metrics, and sales data. The formula used in this calculator follows this logic:
Opens: Derived from your List Size multiplied by your Open Rate.
Clicks: The number of subscribers who opened the email and then clicked a link. Note that CTR in this calculator is measured relative to opens (Click-to-Open Rate), which is a more accurate measure of content engagement.
Conversions: The number of users who clicked through and completed a purchase.
Revenue: Total Conversions multiplied by the Average Order Value (AOV).
Open Rate: This indicates how well your subject line performs. A healthy open rate varies by industry but generally falls between 15% and 25%.
Click-Through Rate (CTR): This measures the effectiveness of your email body content and Call-to-Action (CTA). If you have high opens but low clicks, your content may not be resonating with the audience.
Cost Per Acquisition (CPA): This critical metric tells you how much you spent to acquire a single customer through this specific campaign. If your CPA is higher than your profit margin per product, the campaign may need optimization despite high revenue numbers.
Tips to Improve Your Email ROI
If your calculator results show a negative or low ROI, consider the following strategies:
List Segmentation: Sending targeted emails to specific segments of your list often yields higher open and conversion rates than "batch and blast" emails.
A/B Testing: Test different subject lines to improve open rates, and different button colors or copy to improve click rates.
Automated Flows: abandoned cart emails and welcome series typically have significantly higher ROI than standard newsletters.
Clean Your List: Regularly removing inactive subscribers improves deliverability and ensures you aren't paying for contacts who never engage.