Email marketing metrics and KPIs
Metrics and KPIs for modern email marketers
Email Forwards per campaign
Email Marketing Engagement Score
Email marketing metrics and KPIs every marketer should track
Tracking the right email marketing metrics tells you what's working, what's wasting budget, and what to do next. This guide covers the ten KPIs that matter most.
Email is one of the highest-ROI channels available to growing companies, but raw send volume tells you nothing. The numbers below tell you whether your list is healthy, your content is landing, and your campaigns are actually driving business outcomes.
Open Rate
Open Rate is the percentage of recipients who open a given email.
It's the first signal in the chain. A strong Open Rate means your subject line and sender name earned attention in a crowded inbox. A weak one means your message is getting skipped before it's read.
Subject line testing, audience segmentation, and send-time optimization all move this number. But don't chase Open Rate in isolation: email clients that auto-load images inflate it, so pair it with Click-Through Rate to confirm real engagement.
Click-Through Rate
Click-Through Rate (CTR) is the percentage of recipients who click at least one link in your email.
CTR tells you whether your content earns action, not just attention. A high Open Rate with a low CTR usually means the email body isn't delivering on the subject line's promise.
Strong CTR comes from clear calls-to-action, content matched to the reader's intent, and layouts that work on mobile. If you're pasting CTR data into a spreadsheet each week and trying to spot trends manually, a live dashboard removes that step entirely.
Email Marketing Metrics & KPIs
Email Marketing Engagement Score
Measure how effective email marketing campaigns are at engaging your audience.
Email Forwards
Measure how many times recipients share your email with others, a direct signal that your content delivered enough value to pass along.
Email marketing statistics
Metrics to gain insight into your email marketing campaigns.
Email Subscribers
Track your email list growth, health, and engagement to understand what your content is earning.
Email Website Traffic Metrics
Increase your goal conversion rates with the right email website traffic data.
Unsubscribes
Unsubscribes measure the number of recipients who opt out of your email list, showing whether your content, cadence, and audience fit are working.
Click Rate vs Click-Through Rate
Click Rate and Click-Through Rate measure different things in email marketing. Tracking both tells you exactly where your campaigns are winning or losing.
Click-Through Rate vs. Click-To-Open Rate
Click-Through Rate and Click-To-Open Rate measure different things. Understanding both helps you diagnose what's working in your email campaigns and where to improve.
Click-to-Open Rate (CTOR)
Click-to-Open Rate (CTOR) measures the percentage of people who opened your email and then clicked a link inside it. It tells you whether your email content is working, not just your subject line.
Email Bounce Rate
Email Bounce Rate is the percentage of emails that fail to reach recipients' inboxes. Learn how to calculate it, what causes a high rate, and how to reduce it.
Email Click Through Rate (CTR)
Email Click Through Rate measures the percentage of email recipients who clicked on a link inside your email. It tells you whether your audience is engaging with your content, not just opening it.
Unique Clicks
Unique Clicks counts the number of individual subscribers who clicked at least one link in your email campaign or marketing message, with each person counted once no matter how many times they clicked.
Unsubscribe Rate
Unsubscribe Rate is the percentage of email subscribers who opt out after receiving a campaign. Track it to keep your list healthy, protect your sender reputation, and catch content or frequency problems early.
Hard vs Soft Email Bounces
When an email fails to reach its destination, it bounces. Understanding the difference between hard and soft bounces helps you protect your sender reputation and keep your list clean.
Marketing Dashboard Examples
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CMO Dashboard
Your marketing command centre for real-time insights.
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Marketing Performance Dashboard
Your marketing ROI, in real-time.
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Lead Generation Dashboard
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Content Marketing Dashboard
The ultimate guide to measuring your content's performance and proving its ROI.
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SEO Analytics Dashboard
Track keyword rankings, organic traffic, and backlinks in one place to measure and improve your SEO performance.
Conversion Rate
Conversion Rate is the percentage of recipients who complete a desired action after clicking through from your email.
This is where email connects directly to revenue or pipeline. The desired action might be a purchase, a demo booking, a form submission, or a trial signup. Whatever it is, Conversion Rate tells you whether the full journey from inbox to outcome is working.
Landing page experience, offer relevance, and follow-up sequencing all affect this number. When Conversion Rate drops, the problem is rarely the email itself. Check what happens after the click.
Bounce Rate
Bounce Rate is the percentage of emails that were not delivered to the recipient's inbox.
Hard bounces happen when an address is invalid or doesn't exist. Soft bounces are temporary: a full inbox, a server timeout. Both erode your sender reputation over time if left unaddressed.
A clean list and a double opt-in process keep Bounce Rate low. Most email platforms flag hard bounces automatically; act on them quickly.
Create custom dashboards for you and your team.
Get started with KlipsUnsubscribe Rate
Unsubscribe Rate is the percentage of recipients who opt out of your list after receiving a campaign.
Some churn is normal and even healthy. What you want to avoid is a sustained upward trend, which signals a mismatch between what subscribers expected and what they're getting.
Segmentation, send frequency, and content relevance are the main levers. If you're sending the same message to your entire list regardless of where people are in the customer journey, Unsubscribe Rate will tell you.
Email sharing and forwarding rate
Email Sharing and Forwarding Rate tracks how often recipients share or forward your email to others.
It's the organic amplification metric. When this number is meaningful, it means your content is useful enough that people want to pass it on. That's a signal worth paying attention to when deciding what to send next.
Include social sharing buttons, make the content easy to excerpt, and give readers a reason to share. Referral incentives can help, but genuinely useful content does more.
List growth rate
List Growth Rate measures the net increase in your email subscriber list over a given period.
A list that isn't growing is slowly shrinking, because unsubscribes and inactives accumulate over time. This metric keeps you honest about whether your acquisition efforts are keeping pace.
Track it as: (new subscribers minus unsubscribes and bounces) divided by total list size, expressed as a percentage. Opt-in forms, lead magnets, and cross-channel promotion all feed this number.
Return on Investment
Return on Investment (ROI) measures the revenue generated by your email campaigns relative to what you spent running them.
Email ROI is calculated by dividing net revenue from email by total campaign costs. It's the metric that justifies the budget and surfaces which campaigns are actually driving financial results versus just generating opens.
To move ROI, focus on the full funnel: list quality, offer relevance, and post-click experience. Knowing your ROI in real time, rather than pulling it together at the end of the month, means you can act on underperformance while a campaign is still running.
Spam complaint rate
Spam Complaint Rate is the percentage of recipients who mark your email as spam.
Even a small number of complaints can trigger deliverability problems. Email providers use complaint rates as a trust signal, and a damaged sender reputation affects every campaign you send, not just the one that caused the problem.
Use a recognizable sender name, honour unsubscribe requests immediately, and make sure your content is relevant to the audience receiving it. Compliance with CAN-SPAM and GDPR is the floor, not the ceiling.
Time spent on email
Time Spent on Email measures how long recipients spend reading your emails.
It's a proxy for content quality. If people are opening but bouncing in seconds, the content isn't delivering. If they're reading to the end, you've earned their attention.
Longer read times correlate with higher CTR and lower unsubscribes. Clear formatting, scannable structure, and content that respects the reader's time all contribute.
Create custom dashboards for you and your team.
Get started with KlipsPutting email metrics to work
Knowing these ten metrics is the starting point. The real advantage comes from seeing them together, updated automatically, without waiting for someone to pull a report.
When Open Rate, CTR, Conversion Rate, and ROI are visible in one place, patterns surface faster. You stop finding out a campaign underperformed after it's over, and start catching it while there's still time to adjust.
A live email marketing dashboard keeps your team aligned on what's actually happening, not what last week's export showed.