Unsubscribe Rate Calculator

Watching for early warning signs in email campaigns

Unsubscribe rate is one of the clearest signals that something about a specific email campaign - content, frequency, or targeting - is misaligned with what your list actually wants to receive.

Worked example

For 20 unsubscribes out of 10,000 emails delivered:

Unsubscribe Rate = 20 / 10000 x 100 = 0.2% (Acceptable but worth monitoring)

Unsubscribe Rate	General Assessment
Under 0.2%	Healthy range
0.2% - 0.5%	Acceptable but worth monitoring
Above 0.5%	Elevated - review content, frequency, or targeting

A sudden spike above your normal baseline for one specific campaign usually points to something particular about that send (unexpected content, too-frequent messaging, or a poorly matched segment) rather than a broader ongoing list quality problem.