Customer Churn Rate Calculator
Calculate monthly customer churn and the number of customers retained. Free, instant and mobile-friendly.
Enter your numbers
Formula
Customer churn = Customers lost ÷ Customers at start × 100
How to use this result
Use the result to compare scenarios, set targets and identify the number that most affects your decision. Recalculate when prices, costs, customer volume or campaign performance change.
This calculator provides an estimate based on your inputs and is not accounting, tax, legal or investment advice.
Understand your Customer Churn Rate Calculator result
Customer churn measures the share of starting customers lost during a period. Consistent period definitions make it useful for monitoring retention and forecasting.
Worked example
Starting with 500 customers and losing 22 produces a 4.4% churn rate and leaves 478 retained customers before adding any new customers.
How to interpret it
Even modest recurring churn compounds over time. Segment cancellations by plan, tenure and reason to identify problems that an overall rate can hide.
Practical next steps
- Keep monthly and annual churn definitions separate.
- Exclude new customers from the starting base.
- Collect cancellation reasons and test retention actions.
Questions to ask before deciding
Are all relevant costs included? Is the time period consistent? How would the result change if volume, price or cost moved by 10%? Save your assumptions so you can compare the estimate with actual performance later.