How to Calculate Customer Churn

What is Customer Churn?

Customer churn is the number of customers who cancel their subscriptions during a period. This is an easy metric to measure and is often done monthly or quarterly.

While the numbers are an accurate indicator of subscriber gain and loss, they do not reflect the entire subscriber flow. Using sociographic, demograhic and subscriber history data together provides a more meaningful analysis of subscriber behavior and engagement.

How to Calculate Customer Churn


It is the first of the September. You had 1000 subscribers on August 1. At the end of business on August 31 you had 975 subscribers.

975 / 1000 = 25 customers lost for a 3% churn rate.

On the other hand, if you had 1000 subscribers on August 1 and had 1225 on August 31, then

1225 / 1000 = 225 customers gained for a 23% subscriber increase.

Simple Customer Churn Formula Cheatsheet

Churn = ((Ending customer count - beginning customer count) = gain/loss / beginning customer count)