# How to use Retention Rate Calculator

Enter customers at the start of a period and how many of that group stayed. You
get retention, implied churn, compounded annual retention, and a rough lifetime.

The tool is at form.ms/tools/retention-rate-calculator
[https://form.ms/tools/retention-rate-calculator].


1. OPEN THE CALCULATOR

Go to the Retention Rate Calculator
[https://form.ms/tools/retention-rate-calculator]. Retention is customers
retained divided by customers at start.




2. PICK A PERIOD AND ENTER THE COHORT

Choose Monthly, Quarterly, or Annual. Type Customers at start and Customers
retained. Retained means people who were already in the starting count and
remained. Do not add brand-new signups.


3. READ RETENTION AND CHURN

Retention plus churn is 100% for that cohort. Annual retention is the period
retention to the power of n (12 for monthly, 4 for quarterly).

Numbers stay in your browser. If you track losses or revenue churn, use the
Churn Rate Calculator
[https://formms.help.center/article/1033-how-to-use-churn-rate-calculator].