Customer Churn Rate Calculator
Enter the number of customers you started with and how many you lost to calculate your churn rate and retention rate.
Customer Churn Rate Calculator
Calculates the percentage of customers lost over a period and the corresponding retention rate.
This calculator divides customers lost during a period by the number you started with to produce a straightforward customer churn rate, then reports the complementary retention rate. It's one of the most-watched metrics for subscription and membership-based businesses, since even small changes in churn compound significantly over time — use it consistently over the same period length (monthly, quarterly, annually) to track trends accurately.
Example
- With the default values shown above, this calculator returns: Churn Rate ≈ 5%; Retention Rate ≈ 95%.
Frequently Asked Questions
What's a 'good' churn rate?
Acceptable churn rates vary a lot by industry and business model — subscription SaaS businesses often target low single-digit monthly churn, while other sectors may tolerate higher rates; benchmark against your specific industry rather than a universal number.
Does churn rate include new customers gained?
No — this simple churn rate only looks at customers lost as a share of the starting base; it doesn't net out new customers gained during the period, which is tracked separately (e.g. in net revenue retention).
Sources
- Standard formula, publicly documented method