Engagement Rate Calculation

Overview

Engagement rate measures audience interaction relative to reach or audience size. Formula: (reactions + comments + shares) / denominator × 100%. The denominator choice (reach, impressions, followers) significantly affects the result. Computes in O(n) per post set.

When to Use

Trigger conditions:

• Computing engagement metrics for social media reporting
• Benchmarking account or post performance against industry averages
• Comparing content performance across posts or accounts

When NOT to use:

• When evaluating influence holistically (use influence measurement)
• When modeling content spread dynamics (use virality models)

Algorithm