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Subscriber Opt-out Rate per Thousand Calculator

Subscriber Opt-out Rate per Thousand helps you calculate a specific quantity (per 1,000) from values you measure or plan for: Opt-outs, Delivered messages. The calculator evaluates the stated equation directly on your device and displays the result without contacting a server. It is designed for the particular task named above, not for automatically estimating all related costs, risks or conditions. Do not compare campaigns with different consent and sampling bases. Verify your measurements and compare the worked example before applying the result.

How to use this calculator

  1. Measure or estimate Opt-outs, Delivered messages using a consistent set of units.
  2. Enter the values in the labeled input boxes; values outside permitted ranges are rejected.
  3. Read the numerical result in per 1,000; adjust inputs to compare scenarios.

Subscriber Opt-out Rate per Thousand formula

1000*optouts/delivered (per 1,000).

  • The calculation uses the input variables Opt-outs, Delivered messages according to the specified expression.
  • Do not compare campaigns with different consent and sampling bases.

Worked examples

Worked example: Subscriber Opt-out Rate per Thousand

Example values: Opt-outs = 12, Delivered messages = 48.

Apply 1000*optouts/delivered.

For the stated input values, the calculated result is approximately 250 per 1,000. Recheck measurement units and rounding for your real project.

Understanding the result

The result is a quantity in per 1,000, not an independent measurement.

Do not compare campaigns with different consent and sampling bases.

Important notes

Do not compare campaigns with different consent and sampling bases.

Use measurements from the same scenario and verify local regulations or professional standards where relevant.

Frequently asked questions

What does Subscriber Opt-out Rate per Thousand compute?

The per 1,000 result from Opt-outs, Delivered messages using the displayed equation.

Which limitations matter?

Do not compare campaigns with different consent and sampling bases.

How can I check the result?

Enter the example values and independently evaluate the formula with the same units.

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Related explanations

Learn the method behind the number or compare the terminology before using the calculator.

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This page provides a calculation tool plus explanatory information so you can understand what the result means and when the underlying method may not fit your situation.