Open Rate38.0%
Click-Through Rate (CTR)5.0%
Unsubscribe Rate0.16%
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Email Metrics Diagnostic
Every operator checks open rates. Most check click rates. Almost nobody tracks the three metrics that actually predict revenue growth. Plug in your raw numbers and see all seven diagnostic metrics at a glance.
Email Diagnostics
Seven-Metric Dashboard
Enter your raw email numbers from one send or one period. All seven metrics calculate automatically.
Standard Metrics
Diagnostic Metrics
Click-to-Open Rate (CTOR)13.2%
Revenue per Email (RPE)$0.11
List Growth Rate+2.9%
Revenue per Subscriber$0.10
Portfolio health
Good
Interpretation Guide
What Each Metric Tells You
CTOR (Click-to-Open Rate) — Measures content quality independent of deliverability. Low CTOR with high open rate means people open but don't find value. Fix the content, not the subject line.
RPE (Revenue per Email) — The most actionable diagnostic metric. Any email below $0.03 RPE gets flagged for rewrite. Directly tells you which sends earn and which don't.
List Growth Rate — Negative means your list is shrinking — unsubscribes and bounces outpace new captures. Growing growth rate with declining RPE means you're adding low-quality subscribers.
Revenue per Subscriber — The single number that captures the entire funnel. Below $1.00/month means something is broken. Above $2.50 means the system is compounding.