Email rate calculator

Enter two numbers and get your bounce, spam complaint, open, reply, positive reply or click rate against the safe limits.

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Your bounce rate is 2.8%. Watch it

2.8% is over the 2% healthy ceiling and under the 4% line (ken pauses sending). Fix it before it climbs. 84 / 3,000 x 100

2.8%

The lines that matter

Stay under the first, never reach the second

Healthy ceiling

GuidelineCommon deliverability guidance: keep hard bounces under 2%.

Ken pauses sending

Ken limitKen stops an inbox sending when its hard bounces pass 4%.

What to do

Stop sending to that list. Verify every address before the next send, remove the bounced ones, and check that the domain's SPF, DKIM and DMARC pass.

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Formula: bounce rate = bounced / sent x 100. Use the same period for both numbers, and count only real sends, not warmup.

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What the email rate calculator does

Pick a rate, enter two numbers, and see where you stand against the lines that matter. It covers six rates, each with its formula:

Bounce rate = bounced / sent.
Spam complaint rate = complaints / delivered.
Open rate = opens / delivered.
Reply rate = replies / delivered.
Positive reply rate = positive replies / replies.
Click rate = unique clicks / delivered.

How to read the result

The gauge shows the rate against its thresholds, and each threshold names its source.

Spam complaints: Google's sender guidelines say to stay under 0.1% and never reach 0.3%. Yahoo uses the same 0.3% limit.
Bounces: under 2% is the usual healthy line, and 4% is where Ken stops an inbox sending.
Opens have no target, because privacy features and security scanners open emails automatically.

Reply, positive reply and click rates are compared with published benchmarks, and a result over the line links to the tool that fixes it once that tool is live.

How to fix a rate over the line

For bounces, stop sending to that list, verify every address and check that SPF, DKIM and DMARC pass. For complaints, pause, narrow the list to people who fit, add a plain opt-out line and lower the volume per inbox. For a low reply rate, fix the list and the offer before the wording. For few positive replies, read the negative ones for the pattern, which usually points at targeting.

Why it matters for cold email

Bounce and complaint rates decide whether you reach the inbox at all. Mailbox providers watch both per sending domain, and a domain that crosses the lines lands in spam for everyone on the list. Reply and positive reply rates decide whether the inbox placement was worth anything.

Questions

How do you calculate bounce rate?

Bounce rate = bounced emails / emails sent x 100. 12 bounces on 800 sends is 1.5%. Count hard bounces, the permanent 5xx failures such as 550 user unknown, separately from soft 4xx bounces, which are temporary and often succeed on retry.

What is a good bounce rate for cold email?

Under 2% is the common guideline. Each hard bounce tells the mailbox provider you wrote to an address that does not exist, and a pattern of them hurts the sending domain. Verify addresses before every campaign and remove the ones that bounced.

What spam complaint rate do Google and Yahoo allow?

Google asks senders to keep the spam rate shown in Postmaster Tools under 0.1% and to never reach 0.3%. Yahoo's limit is also 0.3%. At 0.3%, that is 3 complaints per 1,000 delivered emails.

Why are open rates unreliable?

Apple Mail Privacy Protection loads images, including tracking pixels, for many Apple Mail users whether they read the email or not, and corporate security scanners do the same. Opens are inflated and noisy, so judge campaigns on replies instead.

Should positive reply rate be measured against replies or sends?

Against replies. It answers "of the people who wrote back, how many were interested", which measures fit and offer. Positive replies against sends mixes that with your reply rate.