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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

Unique Opens ÷ Delivered

Total Open Rate

Total Opens ÷ Delivered

Delivery Rate

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.

Track Open Rates Automatically

Connect your email platform and Email Calculator pulls your open rates, CTR, bounces, and more — automatically, for every campaign.