Email Open Rate Optimizer
Calculate your email open rate and compare it to industry benchmarks.
Get suggestions to improve your email marketing performance.
Email Open Rate is the percentage of recipients who opened your email, and it is one of the most important metrics in email marketing.
Open Rate Formula:
Open Rate = (Emails Opened / Emails Delivered) × 100
Note: “Emails Delivered” = Emails Sent - Bounces. Do not use total emails sent as the denominator.
Click-Through Rate (CTR):
CTR = (Unique Clicks / Emails Delivered) × 100
Click-to-Open Rate (CTOR):
CTOR = (Unique Clicks / Unique Opens) × 100
This measures how effective your email content is at driving action among people who actually opened it.
Industry benchmark open rates (2024-2025 averages):
- Retail/E-commerce: 15-20%
- Technology/Software: 18-22%
- Finance/Insurance: 20-25%
- Healthcare: 22-27%
- Education: 23-28%
- Non-profit: 25-30%
- Media/Publishing: 20-25%
- Real Estate: 18-22%
- Travel/Hospitality: 18-22%
Industry benchmark CTR:
- Average across industries: 2-5%
- Good: 5-10%
- Excellent: 10%+
Factors that affect open rate:
- Subject line: 47% of recipients decide to open based solely on the subject line
- Sender name: using a person’s name vs. company name can increase opens by 15-20%
- Send time: Tuesday, Wednesday, and Thursday tend to have highest open rates
- List hygiene: removing inactive subscribers improves open rates
- Personalization: personalized subject lines boost opens by an average of 26%
What about Apple Mail Privacy Protection? Since iOS 15 (released in 2021), Apple pre-loads email content, which can inflate open rates. Many marketers now focus more on click rates as the more reliable metric.
Healthy list metrics:
- Bounce rate should be under 2%
- Unsubscribe rate should be under 0.5%
- Spam complaint rate should be under 0.1%