Metric · 2 min read
Click-to-open rate
Click-to-Open Rate measures how many users clicked a link in your email after opening it. Here’s everything you need to know: what it is, why it matters, how to calculate it, and how to improve it!
Formula
Example. If 1,000 recipients opened your email and 150 of them clicked a link, your Click-to-Open Rate is 15%. This means 15% of engaged readers interacted further with your message.
What it is
Click-to-Open Rate is an email marketing metric that shows the percentage of recipients who clicked on a link after opening your email. It helps you evaluate how engaging your email content and design are for those who actually opened it.
Why it matters
Click-to-Open Rate gives insight into the effectiveness of your email content, call-to-action, and design. Unlike click-through rate, it focuses only on those who opened the email, helping you measure the true quality of your messaging.
How it is calculated
Divide the number of unique clicks by the number of unique opens, then multiply by 100 to express it as a percentage.
A good value
A good Click-to-Open Rate is typically between 10–20%, depending on your industry. Higher rates mean your email content is compelling and encourages users to act.
A bad value
A low Click-to-Open Rate (below 5%) may signal weak copy, poor design, or unclear calls-to-action—even if your subject line worked well.
Do
Use these proven techniques to improve your Click-to-Open Rate and increase email engagement.
- 01
Strengthen your call to action
Use bold, benefit-driven CTAs that stand out visually and guide readers toward the next step.
- 02
Personalize email content
Tailor content based on user behavior or segments to boost relevance and increase interaction.
- 03
Design for clarity and flow
Make emails visually appealing, mobile-friendly, and easy to scan so users reach and click your links effortlessly.
Avoid
Don’t overload emails with too many links or bury your CTA. Neglecting design or testing can lead to disengaged readers.
Learn how teams ship analytics faster
Organizations that scaled analytics without scaling headcount
Not testimonials. Comment threads.
Real things real customers said — each quote pinned to a specific claim, straight from the quotes database.
“We had six or seven different channels and no single source of truth — it was almost impossible, a lot of guesswork.”
“Golden data is clean data — the measure of reality, true and not false, that you can trust based on its source. If you have that, you're good.”
“Most businesses look at a Shopify or Google Analytics dashboard and think it's the source of truth. It's not — that data was never cleaned.”
Calculate Click-to-Open Rate (CTOR) on your own data.
OWOX Data Marts integrates with your email platform to track and compare Click-to-Open Rate by campaign, audience, and content type. Use this insight to refine your messaging and boost engagement.
- No AI hallucinations
- Analyst-governed definitions
- Every number traces to SQL

