Churn Rate Calculator
Measure how many customers you lose each month and how long the average customer stays. Lower churn means more stable, predictable revenue.
Calculate your churn rate
Customer lifetime in months equals 1 divided by the churn rate.
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How it works
Churn rate shows the share of customers you lose in a month and what that means for retention and lifetime.
Enter starting customers
Add the number of active customers you had at the very start of the month.
Enter customers lost
Add how many of those customers cancelled or did not renew during the month.
Read your results
We show monthly churn, retention rate, and the average customer lifetime in months so you can plan around it.
Frequently Asked Questions
Everything you need to know about churn rate.
Churn rate is the percentage of customers you lose over a period, usually a month. It is a core measure of retention because it shows how quickly customers leave. High churn forces you to keep replacing customers just to stay flat.
Divide the number of customers lost during the month by the number of customers at the start of the month, then multiply by 100. For example, losing 5 of 100 customers is a 5 percent monthly churn rate. Retention rate is 100 percent minus the churn rate.
For most small businesses and SaaS products, monthly churn under 5 percent is reasonable and under 2 percent is strong. Lower churn means longer customer lifetimes and more value from every customer you acquire. The right target depends on your market and price point.
Focus on onboarding so customers reach value quickly, and stay in contact with regular check-ins. Make billing painless, since failed or confusing payments cause avoidable cancellations. Listen to the reasons customers leave and fix the most common ones first.
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