CTOR compares clicks to opens to show how engaging your email content is after it’s opened. Learn how CTOR is calculated and used.
CTOR (click-to-open rate) measures how many recipients clicked after opening an email. It’s calculated as clicks divided by opens, which helps you evaluate how compelling your content is once people see it.
Unlike CTR, which is based on total delivered emails, CTOR isolates the performance of the email body. A high CTOR can indicate strong content and CTA, even if open rates are affected by subject lines or inbox behavior.
Because open tracking can be less reliable due to privacy features, interpret CTOR carefully. It’s most useful for comparing campaigns in similar conditions and for identifying content improvements over time.