Work out your email bounce rate in seconds. Enter how many emails you sent and how many bounced, and see the rate plus whether it's healthy, worth watching, or a problem. Runs right here in your browser.
Bounce rate calculator
2.33%bounce rate
Watch. Around or above the industry average — worth cleaning before your next send.
Bands: under 2% healthy, 2–5% worth watching, over 5% risky. These are rules of thumb, not hard lines — the number that matters is your own rate over time, not a single send against an industry average.
How the bounce rate is calculated
The formula is simple: (bounces ÷ sent) × 100. Send 10,000 emails, have 233 bounce, and your rate is 2.33%, right at the cross-industry average. What matters more than any single send is the trend, and whether your hard bounces (the permanent failures) are near zero, since those are the ones that damage your sender reputation.
Under 2%: healthy
In the range mailbox providers expect from a careful sender.
2-5%: worth watching
Around or above the industry average. Clean your list before the next send. See the bounce rate benchmarks for how your industry compares.
Divide the number of bounced emails by the number you sent and multiply by 100: (bounces ÷ sent) × 100. Send 10,000 and have 233 bounce, and your rate is 2.33%. Some platforms divide by delivered rather than sent, which raises the figure slightly. Pick one denominator and use it consistently.
Under 2% is the widely used healthy threshold, 2-5% is worth watching, and above 5% risks getting your mail throttled or filtered. The cross-industry average is around 2.33%, so 'average' already sits in the watch zone. Aim to keep hard bounces near zero specifically, since those are what damage sender reputation.
A hard bounce is permanent (the address or domain doesn't exist) and should be suppressed. A soft bounce is temporary (a full mailbox or a server issue) and is worth retrying. Hard bounces are the ones that hurt your reputation; drive them toward zero.
Verify your list before sending to remove invalid and dead addresses, verify at signup so junk never enters, and re-clean before major campaigns. Most high bounce rates trace to list hygiene, not the sending platform. A rising rate usually means a new import or a decayed segment.
Lower your bounce rate at the source
Verify your list to remove the dead addresses that cause hard bounces before you send. Start free with 100 credits, no card required.
