Email Bounce Rate Calculator
Calculate your email bounce rate from sent and bounced counts, split hard vs soft, and rate it against the 2% / 5% benchmarks. Free, runs in your browser.
Calculate your bounce rate
Enter how many emails you sent and how many hard/soft bounced.
What this bounce rate calculator does
Common use cases
- 1Assessing the health of a campaign
- 2Deciding when to clean your list
- 3Reporting deliverability to stakeholders
- 4Comparing bounce rates across sends
- 5Setting an alert threshold for bounces
- 6Justifying list-validation spend
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About email bounce rate
Bounce rate is the share of sent emails that could not be delivered. A hard bounce is permanent (the address does not exist), while a soft bounce is temporary (mailbox full, server down). Mailbox providers watch bounce rates closely — high rates signal a poorly maintained list and hurt your reputation.
The benchmark is to stay at or below 2%; above 5% you risk throttling and blacklisting. Hard bounces are the most damaging, so remove them after a single failure. Validate addresses at sign-up and prune inactive contacts to keep the rate low.
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How is bounce rate calculated?
Bounce rate is bounced emails divided by emails sent, as a percentage. This tool also splits hard versus soft bounces and shows your delivered count and rate.
What is a good bounce rate?
At or below 2% is healthy, 2–5% is a warning sign, and above 5% risks throttling and blacklisting. Hard bounces should be kept especially low.
What is the difference between hard and soft bounces?
A hard bounce is permanent (the address does not exist) and should be removed immediately. A soft bounce is temporary (mailbox full, server down) and may succeed on retry.
Why do hard bounces matter most?
Repeated hard bounces tell mailbox providers your list is poorly maintained, which damages sender reputation fastest. Remove hard-bouncing addresses after a single failure.
How do I lower my bounce rate?
Validate addresses at sign-up, remove hard bounces promptly, prune inactive contacts, and avoid buying lists. Clean data is the single biggest factor.
Does this calculator store my numbers?
No. The calculation runs entirely in your browser; nothing is uploaded or saved.