Email Marketing Metrics Calculator
Open rate, CTR, click-to-open rate, unsubscribe rate, bounce rate, and revenue-per-email. Every email metric in one view with industry benchmarks.
About the Email Marketing Metrics Calculator
The Email Marketing Metrics Calculator computes every key newsletter and campaign metric in one view. Enter sends, deliveries, opens, clicks, unsubscribes, and revenue; the tool returns delivery rate, open rate, click-through rate, click-to-open rate, unsubscribe rate, bounce rate, list growth, and revenue-per-email - each compared against current industry benchmarks.
Email metrics have become trickier since Apple's Mail Privacy Protection inflated open rates ~20% across the board, making opens unreliable as a single quality signal. The calculator emphasizes click-to-open rate (CTOR) as the cleaner indicator of content quality, and revenue-per-email as the ultimate measure of campaign effectiveness independent of vanity metrics.
Common use cases
- Benchmark each campaign against industry averages for your niche
- Spot list health problems early via unsubscribe and bounce rate trends
- Compare two campaigns on revenue-per-email rather than just opens
- Justify email program ROI to leadership with concrete metrics
Tips for accurate results
When a campaign underperforms, check CTOR before assuming the subject line is the problem. Low open rate plus high CTOR means the subject line is the bottleneck - fewer people opened, but those who did engaged strongly. High open rate plus low CTOR means the body content failed to deliver on the subject's promise. Each diagnosis points to a different fix.
Privacy & data handling
The Email Marketing Metrics Calculator runs entirely in your browser. Nothing you enter is uploaded, logged, or shared with third parties - the math happens locally and your inputs disappear when you close the tab. There is no signup, no email collection, and no daily-use limit.
How are email metrics calculated?
Open rate = opens ÷ delivered. Click-through rate = clicks ÷ delivered. Click-to-open rate = clicks ÷ opens (true content quality, ignores subject-line). Unsub rate = unsubs ÷ delivered. The tool computes all six core metrics from just sends, delivered, opens, clicks, unsubs, and revenue.
What's a good open rate in 2026?
Apple's Mail Privacy Protection inflated reported open rates ~20% since 2021, so benchmarks have shifted. Today: 30-45% for engaged-list newsletters, 18-25% for cold outreach, 10-15% for re-engagement. Open rate is increasingly unreliable as a single metric - pair it with CTR and conversion to judge campaign quality.
Why is CTOR better than CTR?
Click-to-open rate isolates content quality from subject-line quality. A subject line drives opens; content drives clicks. A 5% CTR on 50% open rate (10% CTOR) is much better content than 5% CTR on 25% open rate (20% CTOR - wait, actually that's the same). Higher CTOR means your body content is more engaging given that someone bothered to open.
What unsubscribe rate is too high?
Above 0.5% per campaign is a yellow flag; above 1% is red. Anything sustained above 2% will get you flagged by mailbox providers and tank deliverability. If you see a spike, check segmentation (sent to a stale segment?), frequency (too many sends this week?), and content relevance.
How do I calculate revenue per email?
Revenue per email = total campaign revenue ÷ emails sent. Good ecommerce sends typically hit $0.10-$0.50 RPE; transactional and onboarding emails can hit $5+ RPE. Use this to rank campaigns by absolute value, not just open rate - a low-open-rate email can outperform a high-open-rate one if its audience is closer to purchase.
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