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Email Unsubscribe Rate Calculator

Marketing

Calculate your email unsubscribe rate instantly. Enter emails sent, unsubscribes, and new subscribers gained to find your unsubscribe rate and net list change.

110,000,000
01,000,000
01,000,000

Unsubscribe Rate

0.25%
Net Subscriber Change
35
Subscribers Lost per 1,000 Sent
2.5

This calculator computes your Unsubscribe Rate, Net Subscriber Change, Subscribers Lost per 1,000 Sent from the values you enter.

Inputs
Emails SentUnsubscribesNew Subscribers Gained
Outputs
Unsubscribe RateNet Subscriber ChangeSubscribers Lost per 1,000 Sent

What is a Unsubscribe Rate?

An Email Unsubscribe Rate Calculator measures the percentage of recipients who opt out of your mailing list after a given send — a direct, unambiguous signal of how well your content, frequency, and targeting are matching subscriber expectations. It's calculated simply as unsubscribes divided by emails sent, but this calculator goes further by also factoring in new subscribers gained during the same period, giving you net list change rather than just the loss side of the equation.

Unsubscribe rate matters beyond just list size. Consistently high unsubscribe rates, particularly when paired with spam complaints, damage sender reputation with mailbox providers like Gmail and Outlook, which can push future sends into spam folders even for subscribers who genuinely want to hear from you. Keeping this number low is therefore a deliverability concern for your entire email program, not just a cosmetic list-health metric.

A healthy unsubscribe rate generally sits under 0.2–0.5% per send. Rates meaningfully above that — especially trending upward over successive campaigns — usually point to a specific, identifiable cause: increased send frequency, a content or topic shift, poor segmentation sending irrelevant content to disinterested subscribers, or a recently added list of lower-quality or purchased contacts.

How to use this Unsubscribe Rate calculator

  1. Enter your Emails Sent for the campaign or period you're evaluating.
  2. Enter your Unsubscribes recorded during that same send or period.
  3. Enter your New Subscribers Gained during the same period, from signups, opt-ins, or list imports.
  4. Read the Unsubscribe Rate result and compare it against the general 0.2–0.5% healthy benchmark range.
  5. Check Net Subscriber Change to see whether your list is actually growing or shrinking overall, not just the unsubscribe side.
  6. Review Subscribers Lost per 1,000 Sent when comparing attrition impact fairly across sends of different sizes.

Formula & Methodology

Unsubscribe Rate = Unsubscribes ÷ Emails Sent × 100

Net Subscriber Change = New Subscribers Gained − Unsubscribes

Subscribers Lost per 1,000 Sent = Unsubscribe Rate × 10

Worked example: An email sent to 10,000 people, generating 25 unsubscribes and 60 new subscribers in the same period:

Unsubscribe Rate = 25 ÷ 10,000 × 100 = 0.25%

Net Subscriber Change = 60 − 25 = +35

Subscribers Lost per 1,000 Sent = 0.25% × 10 = 2.5

This list is healthy on both fronts — a well-within-benchmark unsubscribe rate and a positive net subscriber gain for the period.

Frequently Asked Questions

Unsubscribe rate is the percentage of recipients who opt out of your mailing list after a given send, calculated as total unsubscribes divided by total emails sent. It's a direct signal of content fatigue, send frequency problems, or audience mismatch, and tracking it over time helps catch list health issues before they compound.
Unsubscribe Rate = Unsubscribes ÷ Emails Sent × 100. For example, a campaign sent to 10,000 people that generates 25 unsubscribes has an unsubscribe rate of (25 ÷ 10,000) × 100 = 0.25%. This calculator also factors in new subscribers gained during the same period to show your net list change, not just the loss side.
A healthy unsubscribe rate is generally under 0.2–0.5% per send, with rates above 1% typically signaling a content, frequency, or targeting problem worth investigating. Occasional spikes after a major list cleanup, a controversial send, or a significant increase in send frequency are common and not necessarily alarming on their own — the trend across sends matters more than any single data point.
Unsubscribe rate alone only tells you the loss side of list health — a list can have a low unsubscribe rate but still be shrinking if new subscriber acquisition has stalled. Net subscriber change (new subscribers minus unsubscribes) shows the fuller picture, revealing whether your list is actually growing, holding steady, or declining despite a seemingly acceptable unsubscribe percentage.
Common causes include sending too frequently, a mismatch between subscriber expectations (set at signup) and actual content received, a sudden shift in content topic or tone, purchased or poorly-sourced lists with low genuine interest, and insufficient list segmentation sending irrelevant content to uninterested segments. Reviewing what changed immediately before a spike usually identifies the specific cause.
High unsubscribe rates, especially combined with spam complaints, signal to mailbox providers like Gmail and Outlook that recipients don't want your email, which can hurt sender reputation and push future sends into spam folders even for engaged subscribers. Keeping unsubscribe rate low is therefore not just a list-size concern but a deliverability concern affecting your entire program's inbox placement.
No — some unsubscribe volume is healthy and expected, since it naturally removes disengaged subscribers who were unlikely to convert or engage anyway, improving your average [open and click rates](/email-open-rate-calculator/) going forward. Focus on reducing unsubscribes driven by genuine content or frequency mistakes, rather than trying to retain every single subscriber regardless of engagement.
Enter your Emails Sent, Unsubscribes, and New Subscribers Gained for the period you're evaluating. The calculator instantly returns your Unsubscribe Rate, Net Subscriber Change, and Subscribers Lost per 1,000 Sent — a useful figure for comparing unsubscribe impact across sends of different sizes.
Both are useful for different purposes — per-send unsubscribe rate helps diagnose whether a specific email caused a spike, while a monthly or quarterly aggregate view shows the overall health trend of your list and program. Tracking both consistently, rather than only checking after a suspected problem, catches gradual list health decline before it becomes severe.
Unsubscribe rate is one input into your overall [list growth rate](/list-growth-rate-calculator/) — even strong new subscriber acquisition can be offset or reversed by a high unsubscribe rate, so the two metrics should always be reviewed together rather than in isolation.
Review what changed in your most recent sends — frequency, content topic, segmentation, or list source — and check whether the spike is concentrated in a specific segment rather than across your whole list. A segment-specific spike usually points to a targeting mismatch for that group, while a list-wide spike more often points to a frequency or content-quality issue affecting everyone.
Also known as
unsubscribe rate calculatoremail opt-out rate calculatoremail list churn calculatoremail attrition ratelist decay calculator