📉 Churn Rate Calculator
Calculate what percentage of your customers you lost over a given period.
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What is churn rate?
Churn rate is the percentage of customers a business loses over a given period, such as a month or a year. It’s a key health metric for subscription businesses, memberships, and any recurring-revenue model.
How this calculator works
Enter how many customers you had at the start of the period and how many of those customers were lost (cancelled, didn’t renew, etc.) by the end. Churn rate is calculated as customers lost divided by customers at the start, expressed as a percentage. Retention rate is simply 100% minus churn rate.
For general business tracking purposes, it helps to calculate churn consistently over the same time period (e.g. monthly) so trends are comparable over time.
Last reviewed August 2026