Quick answer
How do you calculate Unsubscribe Rate?
Use Unsubscribe rate = Unsubscribes / Delivered emails x 100. Enter the matching values above to calculate the result instantly.
What it measures
Understanding Unsubscribe Rate
Calculate the percentage of delivered emails that generated an unsubscribe. A rising rate can signal frequency fatigue, weak expectation setting, poor segmentation, or content that no longer matches subscriber intent.
Interpretation
What the result means
The result is the share of delivered messages associated with an unsubscribe action for the send.
Action
How to use it
Review by campaign type, acquisition source, tenure, and frequency, and investigate complaint and engagement trends at the same time.
Limits
What it leaves out
Provider definitions, list-unsubscribe behavior, bot activity, suppressed contacts, and delayed events can create reporting differences.
The math
Unsubscribe Rate formula
Worked example
Example calculation
- Calculation
- 85 / 40,000 x 100
- Result
- 0.21% unsubscribe rate
Step by step
How to use this calculator
- 1Enter unsubscribes, delivered emails.
- 2Keep every input on the same time period and measurement basis.
- 3Review the result, then change one assumption at a time to test scenarios.
Decision support
When this calculator is useful
- Email health monitoring
- Frequency decisions
- Audience segmentation
Common questions
Frequently asked questions
Which inputs should I use for Unsubscribe Rate?
Use unsubscribes, delivered emails, measured from the same source and period. Include only values that match the definitions shown beside each field.
Why might two Unsubscribe Rate calculations differ?
The systems or accounting policies may define unsubscribes, delivered emails differently. Compare the time period, scope, source, and treatment of exceptional items before comparing results.
How often should I recalculate Unsubscribe Rate?
Recalculate when any input changes materially and on the same reporting cadence used for the decision. Save the source and date of each input so the trend remains comparable.
Can I use Unsubscribe Rate by itself?
No single metric captures the full decision. Use the result with the related measures, assumptions, and limitations shown on this page.
Calculation reviewed: 2026-06-18. CalcPilot uses the formula shown above and tests representative values during the production build. See our methodology and correction policy.
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