Compare calculators

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

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.

Marketing

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.

Key differences

	Customer Retention Rate Calculator	Email Unsubscribe Rate Calculator
Category	Marketing	Marketing
Inputs required	3	2
Result	Customer Retention Rate (%)	Unsubscribe Rate (%)
What it does	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.	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.