Please enter a valid number of visitors greater than 0.
Enter cost to calculate Cost Per Acquisition (CPA).
Conversion Rate (CR):0.00%
Cost Per Acquisition (CPA):–
Non-converted Visitors:0
function calculateCRO() {
// Get input values
var visitorsInput = document.getElementById('totalVisitors');
var conversionsInput = document.getElementById('totalConversions');
var costInput = document.getElementById('totalCost');
var visitors = parseFloat(visitorsInput.value);
var conversions = parseFloat(conversionsInput.value);
var cost = parseFloat(costInput.value);
// Error Handling elements
var visitorError = document.getElementById('visitorError');
var resultsBox = document.getElementById('results');
// Reset error state
visitorError.style.display = 'none';
visitorsInput.style.borderColor = '#ced4da';
// Validate Visitors (Must be number and > 0)
if (isNaN(visitors) || visitors 0 && cost > 0) {
cpa = cost / conversions;
cpaText = "$" + cpa.toFixed(2);
} else if (cost > 0 && conversions === 0) {
cpaText = "Infinite (No Conversions)";
} else if (cost === 0) {
cpaText = "Free";
}
// Calculate Non-converted
var missed = visitors – conversions;
if (missed < 0) missed = 0; // Edge case protection
// Update DOM
document.getElementById('displayRate').innerText = conversionRate.toFixed(2) + "%";
document.getElementById('displayCPA').innerText = cpaText;
document.getElementById('displayMissed').innerText = missed.toLocaleString();
// Show Results
resultsBox.style.display = 'block';
}
How to Calculate Conversion Rate Online: A Complete Guide
Understanding your conversion rate is pivotal for any online business, whether you are running an e-commerce store, a SaaS platform, or a lead generation site. The Online Conversion Rate Calculator above helps you instantly determine the percentage of visitors who complete a desired action.
What is Conversion Rate?
Conversion Rate (CR) is a metric used in digital marketing to evaluate the effectiveness of a website or ad campaign. It represents the percentage of users who take a specific desired action (a "conversion") out of the total number of visitors to the page.
A conversion can be anything depending on your business goals:
Purchasing a product (Macro-conversion)
Filling out a contact form (Lead generation)
Signing up for a newsletter (Micro-conversion)
Downloading a whitepaper or PDF
The Conversion Rate Formula
Calculating your conversion rate manually is straightforward. The math requires two primary data points: the volume of traffic (visitors) and the volume of successful actions (conversions).
Conversion Rate = (Total Conversions ÷ Total Visitors) × 100
Calculation Example
Imagine you launch a new landing page for a webinar.
Total Visitors: 5,000 unique users land on the page.
Total Conversions: 250 users sign up for the webinar.
Using the formula: (250 ÷ 5,000) = 0.05. Then, multiply by 100 to get the percentage: 5%.
Why is Cost Per Acquisition (CPA) Included?
While Conversion Rate tells you how often people convert, it doesn't tell you the cost of that success. Our calculator includes an optional "Total Cost" field to help you calculate the Cost Per Acquisition (CPA).
If you spent $500 on ads to get those 5,000 visitors and 250 conversions, your CPA is $2.00 per signup. Balancing a high conversion rate with a sustainable CPA is the key to profitability.
What is a Good Conversion Rate?
Benchmarks vary wildly by industry, traffic source, and device. However, general market data suggests the following averages:
E-commerce: Average rates typically hover between 1% and 3%.
Lead Generation (B2B): Rates can be between 2% and 5%.
Landing Pages: Highly optimized pages can see rates up to 10% or higher.
If your rate is below 1%, it usually indicates issues with either traffic quality (targeting the wrong people) or user experience (unclear navigation, slow load times, or lack of trust).
How to Improve Your Conversion Rate (CRO)
Conversion Rate Optimization (CRO) is the process of increasing the percentage of visitors who perform a desired action. Here are three proven strategies:
A/B Testing: Test different headlines, button colors (CTA), and layouts to see which version performs better statistically.
Improve Page Speed: A one-second delay in page response can result in a 7% reduction in conversions.
Reduce Friction: Simplify your forms. Asking for too much information upfront (like phone numbers or addresses) often scares users away.
Frequently Asked Questions
Can conversion rate be over 100%?
Generally, no. You cannot have more conversions than visitors. However, if you are tracking "actions" rather than unique users (e.g., one user buying five times), your metric might exceed 100%, but this usually indicates a data tracking setup that needs review.
Does traffic source affect conversion rate?
Absolutely. Organic search traffic often converts better than social media traffic because the user is actively searching for a solution. Email marketing traffic also tends to have a high conversion rate because the audience is already warm.