Email Open Rate Calculator
Calculate your unique open rate, total open rate, and delivery rate instantly. Enter your campaign numbers below.
Enter Your Campaign Data
Your Results
Unique Open Rate
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Unique Opens ÷ Delivered
Total Open Rate
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Total Opens ÷ Delivered
Delivery Rate
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Delivered ÷ Sent
Industry Benchmarks
E-commerce
15–25%
B2B / SaaS
20–30%
Media / Publishing
25–40%
Average unique open rates by industry. Source: industry averages 2024–2025.
How Open Rate is Calculated
Unique Open Rate = (Unique Opens ÷ Emails Delivered) × 100
Total Open Rate = (Total Opens ÷ Emails Delivered) × 100
Delivery Rate = (Emails Delivered ÷ Emails Sent) × 100
Unique opens count each subscriber once, even if they open multiple times. Total opens counts every open event. Most platforms report the unique open rate as the primary metric.