Compare calculators

Both calculators run independently — change the inputs on either side to compare results.

Email Unsubscribe Rate Calculator

Measures the percentage of recipients who opted out of your email list after a campaign. Use it after each send to benchmark list health and flag content or frequency problems.

Number of Unsubscribes

Emails Delivered

Fill in the required fields to see your result.

Marketing

Customer Retention Rate Calculator

Measures the percentage of existing customers a business keeps over a given period. Use it monthly or quarterly to track loyalty, reduce churn, and benchmark against industry standards.

Customers at End of Period

New Customers During Period

Customers at Start of Period

Fill in the required fields to see your result.

Key differences

	Email Unsubscribe Rate Calculator	Customer Retention Rate Calculator
Category	Marketing	Marketing
Inputs required	2	3
Result	Unsubscribe Rate (%)	Customer Retention Rate (%)
What it does	Measures the percentage of recipients who opted out of your email list after a campaign. Use it after each send to benchmark list health and flag content or frequency problems.	Measures the percentage of existing customers a business keeps over a given period. Use it monthly or quarterly to track loyalty, reduce churn, and benchmark against industry standards.