function calculateIGEngagement() {
// Get input values
var likes = document.getElementById('ig_likes').value;
var comments = document.getElementById('ig_comments').value;
var saves = document.getElementById('ig_saves').value;
var followers = document.getElementById('ig_followers').value;
// Parse to numbers, handle empty inputs as 0
var likesNum = parseFloat(likes) || 0;
var commentsNum = parseFloat(comments) || 0;
var savesNum = parseFloat(saves) || 0;
var followersNum = parseFloat(followers);
var resultBox = document.getElementById('resultBox');
var erResultDisplay = document.getElementById('erResult');
var erAnalysisDisplay = document.getElementById('erAnalysis');
var erBadgeDisplay = document.getElementById('erBadge');
// Validation
if (!followersNum || followersNum <= 0) {
alert("Please enter a valid Follower Count greater than 0.");
return;
}
// Logic: ((Likes + Comments + Saves) / Followers) * 100
var totalInteractions = likesNum + commentsNum + savesNum;
var engagementRate = (totalInteractions / followersNum) * 100;
// Display Result
resultBox.style.display = 'block';
erResultDisplay.innerHTML = engagementRate.toFixed(2) + "%";
// Analysis Logic based on industry benchmarks (approximate)
var analysisText = "";
var badgeClass = "";
var badgeText = "";
if (engagementRate = 1 && engagementRate = 3.5 && engagementRate < 6) {
analysisText = "Excellent work! Your audience is highly engaged.";
badgeClass = "badge-good";
badgeText = "High Engagement";
} else {
analysisText = "Viral territory! You have an exceptionally loyal and active audience.";
badgeClass = "badge-viral";
badgeText = "Viral / Influencer Level";
}
erAnalysisDisplay.innerHTML = analysisText;
erBadgeDisplay.className = "ig-badge " + badgeClass;
erBadgeDisplay.innerHTML = badgeText;
}
How is Engagement Rate Calculated on Instagram?
Understanding your Instagram Engagement Rate (ER) is crucial for influencers, brands, and marketers. Unlike vanity metrics such as simple follower counts, engagement rate measures how actively your audience interacts with your content. A high engagement rate indicates that your content resonates with your followers, which the Instagram algorithm rewards with higher visibility.
The Standard Formula
The most common method to calculate engagement rate on Instagram is by looking at the total interactions relative to your follower count. This is known as "Engagement Rate per Post by Followers."
ER = ((Likes + Comments + Saves) / Total Followers) × 100
While "Likes" and "Comments" are public metrics, "Saves" and "Shares" are often private data found in your Instagram Insights. If you are calculating the rate for a public account that you do not own, you typically use only Likes and Comments in the numerator.
Alternative: Engagement by Reach (ERR)
For a more accurate assessment of content quality, many social media managers prefer calculating Engagement Rate by Reach. This formula replaces "Total Followers" with "Reach" (the number of unique accounts that saw the post).
ERR = ((Likes + Comments + Saves) / Reach) × 100
This method is often considered superior because it doesn't penalize you for inactive followers or "ghost" accounts who never see your content.
What is a "Good" Engagement Rate?
Engagement rates vary significantly depending on your industry and your follower count. Generally, as follower counts increase, engagement rates tend to decrease slightly.
Less than 1%: Often considered low engagement. This may suggest that your content is not reaching your audience or isn't resonating with them.
1% to 3.5%: This is the industry standard and considered an average, healthy engagement rate.
3.5% to 6%: Considered high engagement. Accounts in this range are performing very well.
Above 6%: Exceptional engagement, often seen in micro-influencers with very tight-knit communities or viral posts.
Why Does It Matter?
The Instagram algorithm prioritizes content with high engagement. When you post a photo or Reel, Instagram shows it to a small percentage of your followers. If they engage (like, comment, share, or save), the algorithm interprets the content as high-quality and pushes it to more followers and potentially the Explore page.
Tips to Improve Your Calculation
Include Saves and Shares: If you have access to Insights, always include Saves and Shares in your calculation. Saves are a strong signal to the algorithm that your content provides value.
Calculate Averages: Do not rely on a single post. Calculate the engagement rate for your last 10-12 posts to get a true baseline of your performance.
Filter Outliers: If you had one viral post that skewed your data, consider excluding it to understand your "typical" performance.