Sum of likes, comments, shares, saves, and clicks.
Total number of times the post was displayed.
Please enter valid numbers. Impressions must be greater than 0.
Engagement Rate per Impression0.00%
For every 1,000 impressions, you receive approximately 0 engagements.
function calculateERPI() {
// 1. Get Input Values
var engagementsInput = document.getElementById('erpi_engagements').value;
var impressionsInput = document.getElementById('erpi_impressions').value;
var resultBox = document.getElementById('erpi_result_display');
var errorMsg = document.getElementById('erpi_error_msg');
var rateDisplay = document.getElementById('erpi_final_rate');
var perThousandDisplay = document.getElementById('erpi_per_thousand');
// 2. Parse values
var engagements = parseFloat(engagementsInput);
var impressions = parseFloat(impressionsInput);
// 3. Validation Logic
// Check if inputs are numbers and if impressions is greater than 0
if (isNaN(engagements) || isNaN(impressions) || impressions <= 0 || engagements < 0) {
errorMsg.style.display = 'block';
resultBox.style.display = 'none';
return;
}
// 4. Reset Error State
errorMsg.style.display = 'none';
// 5. Calculation Logic: (Engagements / Impressions) * 100
var engagementRate = (engagements / impressions) * 100;
// Calculate engagements per 1000 impressions for context
var perThousand = (engagements / impressions) * 1000;
// 6. Output Formatting
// Show result box
resultBox.style.display = 'block';
// Update DOM elements
rateDisplay.innerHTML = engagementRate.toFixed(2) + "%";
perThousandDisplay.innerHTML = Math.round(perThousand);
}
Understanding Engagement Rate per Impression
In the world of social media analytics, understanding how users interact with your content is vital. While "Reach" measures unique people who see your post, Impressions measure the total number of times your content is displayed, regardless of whether it was clicked or not. The Engagement Rate per Impression (ER impressions) is a critical metric that tells you how compelling your content is relative to how often it is seen.
The Formula
The math behind this metric is straightforward but powerful. It is calculated by dividing the total number of interactions (engagements) by the total number of times the content was displayed (impressions), and then multiplying by 100 to get a percentage.
Engagement Rate = (Total Engagements / Total Impressions) × 100
What Counts as an Engagement?
To use this calculator effectively, you must sum up all relevant interactions. Depending on the platform (Instagram, LinkedIn, Twitter/X, TikTok), engagements typically include:
Likes: The most basic form of approval.
Comments: Indicates higher interest and starts a conversation.
Shares/Retweets: Expands your reach virally.
Saves/Bookmarks: Indicates high-value content users want to reference later.
Clicks: Profile clicks, link clicks, or expanding the "read more" section.
Why Calculate Based on Impressions vs. Followers?
Calculating engagement based on follower count is common, but it can be misleading. Algorithms often do not show your content to all your followers, and conversely, hashtags or "Explore" pages can show your content to non-followers. Calculating based on Impressions gives you a more accurate picture of content performance because it measures success based on actual visibility, not theoretical audience size.
What is a Good Engagement Rate?
Benchmarks vary significantly by industry and platform, but general guidelines for impression-based engagement rates are:
1% – 3.5%: Average/Good. This is a standard range for most organic content.
3.5% – 6%: High. Your content is resonating well with your audience.
Above 6%: Very High/Viral. This usually indicates the content is highly shareable or controversial.
Use this calculator to track your performance over time. If your impressions are high but your engagement rate is dropping, your content might be appearing in feeds but failing to hook the viewer.