How to Calculate Engagement Rate on Instagram

function calculateEngagementRate() { var totalLikes = parseFloat(document.getElementById('totalLikes').value); var totalComments = parseFloat(document.getElementById('totalComments').value); var totalSaves = parseFloat(document.getElementById('totalSaves').value); var totalShares = parseFloat(document.getElementById('totalShares').value); var followerCount = parseFloat(document.getElementById('followerCount').value); var numberOfPosts = parseFloat(document.getElementById('numberOfPosts').value); var resultDiv = document.getElementById('engagementResult'); // Input validation if (isNaN(totalLikes) || totalLikes < 0 || isNaN(totalComments) || totalComments < 0 || isNaN(totalSaves) || totalSaves < 0 || isNaN(totalShares) || totalShares < 0 || isNaN(followerCount) || followerCount <= 0 || isNaN(numberOfPosts) || numberOfPosts <= 0) { resultDiv.innerHTML = 'Please enter valid positive numbers for all fields. Follower Count and Number of Posts must be greater than zero.'; return; } var totalEngagements = totalLikes + totalComments + totalSaves + totalShares; var averageEngagementsPerPost = totalEngagements / numberOfPosts; var engagementRate = (averageEngagementsPerPost / followerCount) * 100; resultDiv.innerHTML = 'Your Instagram Engagement Rate is: ' + engagementRate.toFixed(2) + '%'; if (numberOfPosts > 1) { resultDiv.innerHTML += 'This is an average engagement rate per post over ' + numberOfPosts + ' posts.'; } else { resultDiv.innerHTML += 'This is the engagement rate for a single post or an aggregate of engagements treated as one.'; } }

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