About the Customer Retention Rate Calculator
Customer retention rate over a period, excluding new customers acquired, plus the churn rate.
Also known as: retention rate, app retention, user retention, crr calculator, app-retention.
How to use this calculator
- Enter customers at start, customers at end, new customers during period.
- The result updates instantly as you type — press Calculate (or Enter) at any time.
- Review the breakdown shown under the main result.
- Use Copy result or Share to save the answer or send a link with your inputs.
Formula
Retention = (end − new) ÷ start × 100
Worked example
Using the values pre-filled in the calculator above:
- Customers at start = 1,000
- Customers at end = 1,080
- New customers during period = 200
the calculator returns:
- Retention rate: 88%
- Churn rate: 12%