Email Open Rate Calculator
Calculate your email open rate and see how your campaign compares.
How to calculate open rate
Open rate is opens divided by delivered emails, expressed as a percentage. Enter your numbers above to get it instantly. Delivered means sent minus bounces, so use the delivered count rather than the raw send count for an honest figure.
A caveat for cold email: open tracking has become unreliable since Apple Mail Privacy Protection inflates opens, and open-tracking pixels can hurt deliverability. Many cold email teams now turn open tracking off entirely and judge campaigns on reply rate instead.
Open rate benchmarks
Rough bands for cold outreach, with the caveat that tracking-pixel inflation makes the raw number softer than it looks.
| Open rate | Read |
|---|---|
| Under 20% | Likely a deliverability or subject-line problem |
| 30 to 50% | Healthy for cold email |
| Over 60% | Strong - or inflated by Apple Mail Privacy Protection |
How to improve open rate (and what it really signals)
A low open rate is usually not a subject-line problem - it's a deliverability problem. If your mail is landing in spam, nobody opens it, so fix authentication (SPF, DKIM, DMARC), reputation and warmup before you touch the copy.
Once you're reliably in the inbox, the subject line and sender name do the rest. Keep subjects short, specific and human, avoid spammy phrasing, and remember that for cold email a strong reply rate is a more trustworthy signal of a working campaign than opens.
Frequently asked questions
How is open rate calculated?
Open rate = (unique opens / emails delivered) x 100. Delivered means sent minus bounces.
What is a good open rate for cold email?
Roughly 30 to 50 percent is healthy, though tracking-pixel inflation makes the number soft. Under 20 percent usually points to a deliverability or subject-line problem.
Is open rate reliable for cold email?
Less than it used to be. Apple Mail Privacy Protection auto-loads tracking pixels and inflates opens, and the pixel itself can hurt deliverability. Reply rate is a more honest cold email metric.
How do I improve a low open rate?
Fix deliverability first - authentication, reputation and warmup - since spam-foldered mail is never opened. Then tighten the subject line and sender name. Copy can't rescue mail that isn't reaching the inbox.
Next steps
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