Benchmarks
Clicks tell you what opens can't
01
Clicks ÷ opens
Click-to-open rate (CTOR) measures how many openers acted — the truest read on message relevance.
02
One clear CTA
The highest CTORs come from a single, obvious call to action that matches the reader's intent.
03
CTR vs. CTOR
CTR uses sent as the base; CTOR uses opens. CTOR isolates message quality from deliverability.
More free tools3 tools
Keep your sending healthy
TOOL / 01
Open Rate Calculator
Calculate open rate and benchmark it against industry standards.
TOOL / 02
Bounce Rate Calculator
Calculate bounce rate to gauge list quality and deliverability risk.
TOOL / 03
Spam Complaint Rate Calculator
Monitor complaint rate against ISP thresholds to protect reputation.