function calculateEmailBounce() {
// Get input values
var sentInput = document.getElementById('totalSent');
var hardInput = document.getElementById('hardBounces');
var softInput = document.getElementById('softBounces');
var sent = parseFloat(sentInput.value);
var hard = parseFloat(hardInput.value) || 0;
var soft = parseFloat(softInput.value) || 0;
// Validation
if (isNaN(sent) || sent sent) {
alert("Total bounced emails cannot exceed the total number of emails sent.");
return;
}
// Calculation Logic
var bounceRate = (totalBounced / sent) * 100;
var deliveryRate = 100 – bounceRate;
// DOM Elements for results
var resultBox = document.getElementById('results');
var bounceDisplay = document.getElementById('bounceRateDisplay');
var deliveryDisplay = document.getElementById('deliveryRateDisplay');
var statusDisplay = document.getElementById('healthStatus');
// Update Display
bounceDisplay.innerHTML = bounceRate.toFixed(2) + "%";
deliveryDisplay.innerHTML = deliveryRate.toFixed(2) + "%";
resultBox.style.display = "block";
// Determine Health Status
var statusText = "";
var statusClass = "";
if (bounceRate 2 && bounceRate <= 5) {
statusText = "Warning (Monitor Closely)";
statusClass = "status-warning";
} else {
statusText = "Critical (Risk of Blocking)";
statusClass = "status-critical";
}
statusDisplay.innerHTML = statusText;
statusDisplay.className = statusClass;
}
How to Calculate Bounce Rate for Email Marketing
Understanding how to calculate bounce rate for email campaigns is critical for maintaining a healthy sender reputation and ensuring your messages reach the inbox. The bounce rate represents the percentage of email addresses in your subscriber list that did not receive your message because it was returned by a recipient mail server.
The Email Bounce Rate Formula
To manually calculate your email bounce rate, you use the following standard formula:
For example, if you send a campaign to 10,000 subscribers and 200 emails bounce back:
(200 ÷ 10,000) = 0.02
0.02 × 100 = 2% Bounce Rate
Hard Bounces vs. Soft Bounces
When calculating your bounce rate, it is essential to distinguish between the two types of failures:
Hard Bounce: A permanent failure. This occurs when the email address does not exist, the domain name is invalid, or the recipient has blocked delivery. Hard bounces should be removed from your list immediately.
Soft Bounce: A temporary failure. This happens when the recipient's inbox is full, the server is down, or the message size is too large. Most email service providers will attempt to resend these messages for a period of time.
What is a Good Email Bounce Rate?
Industry benchmarks vary, but generally, a bounce rate below 2% is considered healthy. If your bounce rate climbs above 2%, you should investigate your list hygiene. A bounce rate exceeding 5% is critical and puts your account at risk of suspension by your Email Service Provider (ESP).
How to Lower Your Bounce Rate
To improve your email deliverability metrics:
Use Double Opt-In: Ensure subscribers confirm their email address before being added to your list.
Clean Your List Regularly: Remove inactive subscribers and hard bounces immediately.
Avoid Spam Triggers: Do not buy email lists and avoid using spammy language in subject lines.
Authenticate Your Domain: Implement DKIM, SPF, and DMARC to verify your sender identity.
{
"@context": "https://schema.org",
"@type": "FAQPage",
"mainEntity": [{
"@type": "Question",
"name": "How do you calculate email bounce rate?",
"acceptedAnswer": {
"@type": "Answer",
"text": "The formula to calculate email bounce rate is: (Total Bounced Emails divided by Total Emails Sent) multiplied by 100. For example, if you send 100 emails and 5 bounce, your bounce rate is 5%."
}
},{
"@type": "Question",
"name": "What is the difference between hard and soft bounces?",
"acceptedAnswer": {
"@type": "Answer",
"text": "A hard bounce is a permanent failure, usually indicating an invalid email address. A soft bounce is a temporary failure caused by issues like a full inbox or server downtime."
}
},{
"@type": "Question",
"name": "What is an acceptable email bounce rate?",
"acceptedAnswer": {
"@type": "Answer",
"text": "An acceptable email bounce rate is generally considered to be 2% or lower. Anything above 5% requires immediate attention to list hygiene to avoid being flagged as spam."
}
}]
}