How to use this tool
Replace the example values with your own inputs. Results update as you type. Keep your measurement period and definitions consistent, then use the result to inform the next question in your advertising review.
The formula
Engagement rate = (likes + comments + shares + saves) ÷ audience × 100.
Worked example
435 interactions against 10,000 views produces a 4.35% engagement rate by views.
What the result can tell you
Use one denominator consistently. Engagement by followers and engagement by views answer different questions; neither measures purchases.
Is it free, and where do my inputs go?
The tool runs in your browser without an account or an ad-platform connection. Calculation inputs are not sent to WhatWins. If you save a scenario, it stays in this browser on this device.