Free Email Open Rate Calculator
Calculate your email open rate and benchmark it against industry averages. See how your campaigns compare.
How it works
3 quick steps from input to answer. No account, no install.
Back to the tool- 01
Enter your campaign numbers
Total emails delivered and total unique opens.
- 02
We calculate your open rate
Open rate = (unique opens / delivered) x 100.
- 03
Compare against benchmarks
Industry averages for cold email, marketing email, and transactional email.
Why this matters
Open rate tells you whether your subject lines and sender reputation are working. Cold email open rates of 40-60% are typical for well-targeted campaigns. Below 20% means something is wrong with your targeting, subject lines, or deliverability.
SendboxTrack open rates across every campaign
Sendbox tracks opens and replies by campaign, step, variant, and mailbox, with A/B testing built in.
Campaign analytics
Open and reply rates for every campaign, step, and variant
A/B testing
Test subject lines and see which drives the highest open rate
Per-mailbox numbers
Open, reply, and bounce rates broken out by mailbox
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For cold email: 40-60% is good, above 60% is excellent. For marketing email: 20-30% is typical. Below 20% for any type suggests deliverability or targeting problems.
Ready to land in primary?
Dedicated IPs, isolated infrastructure, and automatic warmup on every plan. Set up on your own, no sales call, and pay for sending volume, not seats.
Every plan includes dedicated IPs. No per-seat fees. Cancel whenever you want.
