Based on the Socialinsider formula (Interactions per post / Followers)
Engagement Rate (By Followers)
0.00%
Average Interactions Per Post
0
What is the Socialinsider Instagram Engagement Rate?
Engagement rate is the definitive metric for marketing success on Instagram. Unlike vanity metrics such as total follower count, the engagement rate measures how actively involved your audience is with your content. This calculator utilizes the standard formula used by analytics platforms like Socialinsider to determine the "Engagement Rate by Followers."
This metric helps brands and influencers understand the quality of their content and the loyalty of their fanbase. A high engagement rate indicates that your content resonates well with your audience, triggering the Instagram algorithm to show your posts to more people.
The Calculation Formula
While there are several ways to calculate engagement (such as by reach or impressions), the most common public-facing method—and the one used in this calculator—is based on follower count. The formula is:
ER = ((Likes + Comments) ÷ Post Count) ÷ Followers × 100
Where:
Likes + Comments: The total sum of interactions across the posts you are analyzing.
Post Count: The number of posts included in the analysis (usually the last 10-12 posts for a current snapshot).
Followers: The total number of people following the account.
What is a Good Engagement Rate?
According to Socialinsider benchmarks, engagement rates vary significantly by industry and audience size. Generally, as follower count increases, the engagement rate tends to decrease. Here is a general breakdown of performance tiers:
Less than 1.0%: Low engagement. This is common for massive celebrity accounts but may indicate a need for strategy adjustment for smaller brands.
1.0% – 3.5%: Average/Good. This is the "sweet spot" where most healthy accounts reside.
3.5% – 6.0%: High. Indicates a very loyal community and high-quality content.
Above 6.0%: Excellent/Viral. Often seen in viral posts or "nano-influencers" with highly niche audiences.
Why Measure Average Interactions Per Post?
The calculator also outputs the "Average Interactions Per Post." This absolute number is crucial for forecasting. If you are planning a sponsored post or a collaboration, knowing that an account averages 500 likes and 50 comments per post allows you to estimate the tangible return on investment (ROI) beyond just the percentage rate.
Tips to Improve Your Instagram Metrics
If your calculation results are lower than expected, consider these strategies:
Post Carousels: Data suggests carousels (slideshows) often generate higher engagement than single images.
Use Call-to-Actions (CTAs): Explicitly asking questions in your captions can drive comment volume up significantly.
Engage Back: Replying to comments within the first hour of posting can boost your content in the algorithm.
Analyze Timing: Use your insights to post when your specific followers are most active.
function calculateIgEngagement() {
// Get input values
var followers = document.getElementById('igFollowers').value;
var posts = document.getElementById('igPosts').value;
var likes = document.getElementById('igLikes').value;
var comments = document.getElementById('igComments').value;
// Clean values (handle strings or empty inputs)
followers = parseFloat(followers);
posts = parseFloat(posts);
likes = parseFloat(likes);
comments = parseFloat(comments);
// Validation
if (isNaN(followers) || followers <= 0) {
alert("Please enter a valid number of followers (greater than 0).");
return;
}
if (isNaN(posts) || posts <= 0) {
alert("Please enter a valid number of posts analyzed (greater than 0).");
return;
}
if (isNaN(likes)) likes = 0;
if (isNaN(comments)) comments = 0;
// Core Calculation
var totalInteractions = likes + comments;
var avgInteractions = totalInteractions / posts;
var engagementRate = (avgInteractions / followers) * 100;
// DOM Elements for Result
var resultBox = document.getElementById('resultBox');
var engagementDisplay = document.getElementById('engagementResult');
var avgDisplay = document.getElementById('avgInteractions');
var ratingBox = document.getElementById('ratingBox');
var ratingText = document.getElementById('ratingText');
// Update Display Values
engagementDisplay.innerHTML = engagementRate.toFixed(2) + "%";
avgDisplay.innerHTML = Math.round(avgInteractions).toLocaleString();
// Determine Rating/Benchmark
var rating = "";
var ratingClass = "";
var explanation = "";
if (engagementRate = 1 && engagementRate = 3.5 && engagementRate < 6) {
rating = "High Engagement";
ratingClass = "rating-good";
explanation = "Your audience is highly connected to your content.";
} else {
rating = "Excellent / Viral";
ratingClass = "rating-great";
explanation = "Exceptional performance, typical of nano-influencers or viral content.";
}
// Apply Rating Styles
ratingBox.className = "result-rating " + ratingClass;
ratingBox.innerHTML = rating;
ratingText.innerHTML = explanation;
// Show Result
resultBox.style.display = "block";
}