Calculate your open rate, reply rate and click rate in seconds — and learn how far to trust each number. Free, with no signup.
Emails sent
Bounces (optional)
Unique opens
Replies (optional)
Link clicks (optional)
Calculate your email open rate, reply rate and click rate in seconds. Free and calculated in your browser.
Enter emails sent
Add how many emails the campaign sent, and bounces if you know them.
Add unique opens
Enter unique opens — not total opens, which count repeat views.
Add replies & clicks (optional)
Include them to get your reply rate and click rate too.
Read the result
See your rates — and how much to trust each of them.
Open rate is unique opens divided by emails delivered, multiplied by 100. The common mistake is dividing by emails sent: bounced emails were never seen by anyone, so they don't belong in the denominator. This calculator subtracts your bounces first, then works out open, reply and click rates from the same delivered number.
Here's what most open rate calculators won't tell you: the number you just calculated is an estimate, not a measurement. Open tracking works by hiding a one-pixel image in your email and counting how many times it loads — and that mechanism breaks in both directions. Apple Mail Privacy Protection pre-loads tracking pixels for its users whether they open the email or not, and corporate security software does the same when it scans inbound mail, so both inflate your count. Meanwhile recipients who block remote images read your email without registering anything.
For cold email there's a second problem: the tracking pixel itself can hurt the deliverability it's supposed to measure. Spam filters associate tracking pixels with bulk mail, and Gmail can show a warning on tracked messages — the opposite of the personal, one-to-one impression a cold email needs to make. This is why Emailchaser is built around reply rate rather than open rate: a reply is a real event that can't be faked by a mail client, and it's the metric that actually correlates with booked meetings and closed deals.
None of this makes the calculator useless. Open rate is still a rough directional signal — a collapse from one campaign to the next hints at a deliverability or subject-line problem worth investigating. Just don't optimize for it, and don't trust small differences.
With those caveats in place: well-targeted cold email campaigns commonly report open rates of 40–60%, and consistently seeing under about 30% usually means something is wrong — a stale list, a spammy subject line, or emails landing in the spam folder. Reply rate benchmarks are more meaningful: a few percent is typical for cold outreach, and well-personalized campaigns to verified lists can do considerably better.
If your rates need work, start with list quality. Verifying addresses before you send keeps bounces low, and low bounces protect the sender reputation that gets your emails seen in the first place.
How do you calculate email open rate?
Open rate = unique opens ÷ emails delivered × 100. Emails delivered means emails sent minus bounces — dividing by emails sent instead understates your rate. For example, 450 unique opens on 980 delivered emails is a 45.9% open rate.
What is a good open rate for cold email?
For well-targeted cold email, figures of 40–60% are commonly cited, and anything under about 30% usually points to a list-quality, subject-line or deliverability problem. Treat all of these numbers as rough, though — open tracking is imprecise enough that small differences between campaigns are usually noise.
Why are open rates unreliable?
Opens are measured with an invisible tracking pixel — a tiny image loaded when the email is displayed. Apple Mail Privacy Protection and corporate security scanners load that pixel automatically, registering opens that never happened, while recipients who block images register nothing even when they read your email. The result can be badly inflated or badly undercounted, and you can't tell which.
How does Apple Mail Privacy Protection inflate open rates?
Since iOS 15, Apple Mail Privacy Protection pre-loads remote images — including tracking pixels — through Apple's servers for users who enable it, whether or not the person ever opens the email. Every one of those recipients can show up as an 'open', which is why lists with many Apple Mail users report inflated open rates.
Does open tracking hurt cold email deliverability?
It can. The tracking pixel is a marker that spam filters associate with bulk email, and Gmail can flag tracked messages, making them look less like the personal one-to-one emails cold outreach should imitate. That's why Emailchaser recommends sending cold emails without open tracking.
What should I measure instead of open rate?
Reply rate. A reply is a real, unambiguous event — no pixel required — and it's the only engagement metric that directly leads to meetings and deals. Use bounce rate to monitor list quality and reply rate to judge your copy and targeting.
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