Email Campaign Performance Calculator
Enter your own campaign numbers below. Anything left blank, zero, or invalid is shown as "—" rather than guessed. Industry comparison is optional and only shown where the metric definition is confirmed compatible.
Your campaign
Performance
Metrics appear automatically as you enter enough inputs on the left — nothing is guessed or filled in.
Compare with industry benchmarks
Compared against MailerLite’s Email Marketing benchmark dataset (median values, 46 industries).
Benchmarks are directional context from third-party aggregated data (MailerLite’s own customer base), not guaranteed performance targets. Actual results vary by list, industry, and sending practices.
How each metric is calculated
- Delivery rate
- Delivered ÷ Emails sent × 100
- Open rate
- Opened ÷ Delivered × 100
- Click rate
- Clicked ÷ Delivered × 100
- Click-to-open rate (CTOR)
- Clicked ÷ Opened × 100
- Can exceed 100% when some opens are not tracked.
- Unsubscribe rate
- Unsubscribed ÷ Delivered × 100
Worked example: a 10,000-email send
With 10,000 sent, 9,800 delivered, 3,920 opened, 392 clicked and 20 unsubscribed, the calculator shows delivery rate 98.00%, open rate 40.00%, click rate 4.00%, CTOR 10.00% and unsubscribe rate 0.20%.
Assumptions and limitations
- Delivered is the base for open, click and unsubscribe rates, so delivery problems don’t lower them. Enter Delivered as reported by your email platform (sent minus bounces).
- Delivered can’t exceed Emails sent, and Opened, Clicked and Unsubscribed can’t exceed Delivered. If any of these happen, no metric is calculated until the inputs are fixed.
- Clicked may be higher than Opened. Some email clients block the open-tracking pixel while still recording clicks, so a CTOR above 100% is reported with a note rather than rejected.
- Use unique opens and unique clicks. Mixing unique and total counts changes every rate.
- Opens are an estimate in most platforms: privacy features that preload images can record opens that never happened, which inflates open rate and lowers CTOR.
- Only CTOR is compared numerically with the MailerLite 2026 industry median, because only its definition (unique clicks ÷ unique opens) is confirmed to match. MailerLite’s open, click and unsubscribe medians are shown for reference without a calculated difference.