Metrics · Channel · Retention · Weekly · % · Updated 2026-07-21

What is Email Unsubscribe Rate?

Short answer: The percentage of recipients who unsubscribe from a list after a given send.

Definition

The percentage of recipients who unsubscribe from a list after a given send.

Formula

Unsubscribes / Emails delivered x 100

How to measure

Divide the count of unsubscribes triggered by a specific send by the number of emails delivered in that send.

Why track it

A rising unsubscribe rate is an early warning that email frequency or relevance has drifted away from what the audience signed up for.

Example

A send to 20,000 subscribers producing 60 unsubscribes reports a 0.3% unsubscribe rate.

FAQ

What is Email Unsubscribe Rate?
The percentage of recipients who unsubscribe from a list after a given send.
How do you calculate Email Unsubscribe Rate?
Unsubscribes / Emails delivered x 100
Why track Email Unsubscribe Rate?
A rising unsubscribe rate is an early warning that email frequency or relevance has drifted away from what the audience signed up for.
What is Email Unsubscribe Rate? Definition, formula, and growth use · Cofounderbase