function calculateSeoRoi() {
// Get input values
var traffic = parseFloat(document.getElementById('currentTraffic').value);
var convRate = parseFloat(document.getElementById('conversionRate').value);
var aov = parseFloat(document.getElementById('aov').value);
var increase = parseFloat(document.getElementById('trafficIncrease').value);
var cost = parseFloat(document.getElementById('campaignCost').value);
// Validation: Ensure all inputs are numbers and non-negative
if (isNaN(traffic) || isNaN(convRate) || isNaN(aov) || isNaN(increase) || isNaN(cost)) {
alert("Please enter valid numbers for all fields.");
return;
}
if (traffic < 0 || convRate < 0 || aov < 0 || increase < 0 || cost 0) {
roi = (netProfit / cost) * 100;
} else if (netProfit > 0) {
roi = 1000; // Represents infinity/high return if cost is 0 but profit exists
}
// Display Results
document.getElementById('resultBox').style.display = 'block';
// Formatting function for currency
var formatter = new Intl.NumberFormat('en-US', {
style: 'currency',
currency: 'USD',
});
document.getElementById('resNewTraffic').innerText = Math.round(newTraffic).toLocaleString();
document.getElementById('resAddRevenue').innerText = formatter.format(additionalRevenue);
var profitEl = document.getElementById('resNetProfit');
profitEl.innerText = formatter.format(netProfit);
if(netProfit >= 0) {
profitEl.style.color = "#28a745";
} else {
profitEl.style.color = "#dc3545";
}
var roiEl = document.getElementById('resRoi');
roiEl.innerText = roi.toFixed(2) + "%";
if(roi >= 0) {
roiEl.className = "result-value roi-positive";
} else {
roiEl.className = "result-value roi-negative";
}
}
Why Use an SEO ROI Calculator?
Search Engine Optimization (SEO) is a long-term investment, and measuring its return on investment (ROI) is crucial for justifying marketing budgets. Unlike paid advertising where costs stop when you stop paying, SEO builds organic equity over time. However, calculating the potential upside before launching a campaign can be complex.
This SEO ROI Calculator helps marketing managers, business owners, and agencies estimate the profitability of an SEO campaign based on projected traffic growth and conversion metrics. By inputting your current performance data and estimated improvements, you can visualize whether the campaign cost is justified by the additional revenue generated.
How the SEO ROI Formula Works
To accurately calculate the Return on Investment for SEO, we look at the additional revenue generated specifically by the organic traffic increase, minus the cost of the campaign.
The core formula used in this calculator is:
Current Revenue: Traffic × Conversion Rate % × Average Order Value (AOV)
Additional Revenue: Projected Revenue – Current Revenue
SEO ROI %: ((Additional Revenue – Campaign Cost) / Campaign Cost) × 100
Key Metrics Explained
Understanding the inputs is vital for an accurate projection:
Organic Traffic: Visitors coming to your site from search engines like Google (excluding paid ads).
Conversion Rate: The percentage of visitors who complete a desired action (purchase, lead form fill).
Average Order Value (AOV): The average dollar amount spent each time a customer places an order. For lead-gen businesses, use the Average Lead Value.
Traffic Increase: A conservative estimate of how much your organic traffic will grow due to the SEO efforts.
Interpreting Your Results
A positive ROI indicates that the campaign generates more profit than it costs. A standard benchmark for a successful SEO campaign is a 200% to 300% ROI (or a 2:1 to 3:1 return). However, remember that SEO is cumulative; a break-even month early in the campaign often leads to high profitability in later months as rankings stabilize and traffic compounds.