Email Open Rate Calculator
Measure the percentage of delivered email newsletters opened by your subscribers.
Email Campaign Open Rate Output
How to Calculate Email Open Rate
Email open rate is the percentage of delivered emails that were opened by recipients. This metric is a key indicator of your subject line's quality, sender name recognition, and list health. If your open rate is low, it means your subscribers are ignoring your emails, or they are landing directly in the spam folder.
Email Open Rate Formula
The standard formula divides unique opens by delivered emails (which represents total emails sent minus bounced emails) and multiplies by 100:
Open Rate (%) = (Unique Opens / Emails Delivered) * 100
Step-by-Step Example Calculation
Suppose you launch an email blast to 10,000 subscribers. 200 emails bounce, leaving 9,800 delivered emails. Out of these, 2,450 unique users open your email. Your open rate is calculated as:
Open Rate = (2,450 / 9,800) * 100 = 25.00%
This means a quarter of your delivered emails were successfully opened. Keeping a historical log of open rates lets you test subject line formats and track brand engagement trends.
Interpretation: What a Good Open Rate Looks Like
Open rates vary by list size and industry type. Here are general industry benchmarks:
- Below 15%: Below Average. Indicates low engagement, generic subject lines, or deliverability issues.
- 15% to 25%: Average / Healthy. The standard open rate range for most retail, tech, and service companies.
- Above 25%: Excellent. Represents high brand loyalty, well-segmented lists, and highly relevant subject lines.
Tips to Improve Your Open Rate
If you want to boost your email opens, focus on these variables:
- Compelling Subject Lines: Use curiosity hooks, clear benefits, or urgency elements. Avoid clickbait and spam-trigger words (e.g., "FREE!", "ACT NOW").
- Optimize Preview Text: The snippet of text displayed right next to the subject line should complement the hook and offer immediate value.
- List Hygiene: Periodically remove inactive subscribers who haven't opened an email in 3-6 months. Unengaged contacts drag down deliverability.
Frequently Asked Questions (FAQ)
Q: How is email open rate calculated?
Email open rate is calculated by dividing the number of unique email opens by the number of delivered emails (sent emails minus bounced emails), and multiplying by 100.
Q: What is a good email open rate?
Across most industries, a good email open rate ranges from 15% to 25%. Factors such as brand trust, subject line clarity, and audience segmentation heavily impact this metric.
Q: How does Apple MPP affect open rates?
Apple's Mail Privacy Protection (MPP) automatically downloads email images, including tracking pixels, in the background for iOS and macOS Mail users. This artificially inflates open rates, making it important to track clicks and CTOR alongside open rates.