function calculateBounceRate() {
// Get input elements
var sessionsInput = document.getElementById("totalSessions");
var bouncesInput = document.getElementById("totalBounces");
var resultContainer = document.getElementById("resultContainer");
var displayBounceRate = document.getElementById("displayBounceRate");
var displayRating = document.getElementById("displayRating");
var displayNonBounce = document.getElementById("displayNonBounce");
var analysisText = document.getElementById("analysisText");
// Parse values
var sessions = parseFloat(sessionsInput.value);
var bounces = parseFloat(bouncesInput.value);
// Validation logic
if (isNaN(sessions) || sessions <= 0) {
alert("Please enter a valid number of Total Sessions (greater than 0).");
return;
}
if (isNaN(bounces) || bounces sessions) {
alert("Number of bounces cannot be higher than total sessions.");
return;
}
// Calculation Logic
// Formula: (Bounces / Sessions) * 100
var bounceRate = (bounces / sessions) * 100;
var nonBounceRate = 100 – bounceRate;
// Display Results
displayBounceRate.innerHTML = bounceRate.toFixed(2) + "%";
displayNonBounce.innerHTML = nonBounceRate.toFixed(2) + "%";
// Determine Rating and Styling
var rating = "";
var ratingClass = "";
var advice = "";
if (bounceRate 25 && bounceRate 40 && bounceRate 55 && bounceRate <= 70) {
rating = "Higher than Average";
ratingClass = "grade-average";
advice = "Your bounce rate is creeping up. Consider optimizing your 'Above the Fold' content and call-to-actions.";
} else {
rating = "High / Poor";
ratingClass = "grade-poor";
advice = "A high bounce rate suggests users aren't finding what they expect. Check for slow loading times, misleading meta titles, or poor mobile UX.";
}
// Apply classes
displayRating.className = "grade-badge " + ratingClass;
displayRating.innerHTML = rating;
analysisText.innerHTML = advice;
// Show the result container
resultContainer.style.display = "block";
}
Understanding Website Bounce Rate Calculation
Bounce rate is one of the most critical metrics in digital marketing and web analytics. It represents the percentage of visitors who enter your site and then leave ("bounce") rather than continuing to view other pages within the same site.
The Formula: Bounce Rate = (Total Single-Page Visits ÷ Total Entrance Visits) × 100
How to Use This Calculator
This tool simplifies the math required to determine your website's engagement levels. You need two specific data points from your analytics software (like Google Analytics, Matomo, or Adobe Analytics):
Total Sessions: The total number of visits that started on your website during a specific time period.
Total Bounces: The number of those visits where the user left without interacting with the page or navigating to a second page.
Interpreting Your Results
Once you calculate your bounce rate, the context is key. A "good" bounce rate varies significantly depending on the type of website you operate.
Website Type
Average Bounce Rate
Content Websites / Blogs
40% – 60%
Lead Generation / Services
30% – 50%
eCommerce / Retail
20% – 45%
Landing Pages
70% – 90%
Portals / Intranets
10% – 30%
Why is My Bounce Rate High?
If your calculation shows a high percentage (above 70%), it usually indicates one of several issues:
Slow Page Load Speed: If your site takes more than 3 seconds to load, users often leave before the page renders.
Misleading Title Tags: If your search result promises one thing but the content delivers another, users bounce immediately.
Poor Mobile Optimization: A broken layout on mobile devices causes immediate abandonment.
Lack of Internal Links: If you don't provide a clear "next step" or related articles, users have nowhere to go but back.
Can a Bounce Rate Be Too Low?
Yes. If your calculator result is under 20%, you should verify your analytics installation. This is often caused by the analytics tracking code firing twice on a single page load, or events (like scroll tracking) being set as "interactive," which tricks the system into thinking a bounce was actually an engaged session.
How to Lower Your Bounce Rate
To improve your score, focus on User Experience (UX) and Intent Matching.
Improve Readability: Use short paragraphs, bullet points, and headers to make content scannable.
Speed Up Your Site: Compress images and minify CSS/JS to ensure instant loading.
Clear Call-to-Action (CTA): Ensure buttons and links are visible and compelling to encourage a second click.
Open External Links in New Tabs: This keeps your tab open while the user explores the reference, preventing a session termination.