What is Email Click Rate?
Email Click Rate is the percentage of all emails delivered that received at least one click, measuring how many recipients took action on an email's content. It is distinct from email open rate, which only measures whether the email was opened, not whether it drove any engagement.
TL;DR
Email Click Rate measures what share of delivered emails actually got someone to click, which is the real test of whether an email's content and offer worked.
Formula
Email Click Rate = (Unique Clicks / Emails Delivered) × 100
Why It Matters
Click rate is the metric that tells a marketer whether an email actually drove action, not just attention. It's the natural next step after open rate: opens show the subject line worked, but clicks show the body content, offer, and call to action worked too. Reading click rate alongside open rate is what lets a team diagnose exactly where an underperforming email is breaking down, since a strong open rate paired with a weak click rate points squarely at the content or offer rather than the subject line. Ignoring click rate and optimizing only for opens can produce campaigns that look successful on a vanity metric while generating no real business outcome. It also feeds directly into downstream metrics like conversion rate, since a click is usually the required first step toward any purchase or signup that follows.
Example
A campaign is delivered to 40,000 inboxes and generates 800 unique clicks. Email click rate is 800 divided by 40,000, times 100, which equals 2%. If open rate for the same campaign is 25% but click rate is only 2%, that gap suggests the subject line is working but the email body, call to action, or offer inside is not compelling enough to convert opens into clicks, a diagnosis that requires reading both metrics side by side rather than either one alone.
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