Email Click Performance Calculator
Measure unique open rate, click rate, and click-to-open rate with explicit denominators.
Your numbers
Example values are prefilled. Use the same reporting period for all inputs.
Unique open rate
30%
Unique click rate
3%
Click-to-open rate
10%
The formula
Open rate = Unique opens / Delivered × 100; Click rate = Unique clickers / Delivered × 100; CTOR = Unique clickers / Unique opens × 100.
Worked example
20,000 delivered, 6,000 unique opens, and 600 unique clickers give 30% open rate, 3% click rate, and 10% CTOR.
Frequently asked
Why can click-to-open rate be misleading?
Privacy features, blocked images, and automated activity affect measured opens and clicks. A click may be recorded without an open, so CTOR can exceed 100%. Use consistently filtered reports and inspect conversions as well.