Churn Rate Calculator

Churn rate is calculated by dividing the number of customers lost during a period by the number of customers you had at the start of that period, then multiplying by 100. For example, losing 25 customers out of 500 starting customers equals a 5% churn rate.

It varies by industry, but many SaaS businesses aim for a monthly churn rate below 5% and an annual churn rate below 10%. E-commerce and subscription businesses often have higher acceptable thresholds. Compare your rate against your own historical trend and industry benchmarks.

Churn rate measures the percentage of customers you lost during a period, while retention rate measures the percentage you kept. Retention rate is simply 100 minus churn rate, so a 5% churn rate corresponds to a 95% retention rate.

This calculator uses the direct relationship between starting customers, lost customers, and ending customers to keep your inputs consistent. If your business also gained new customers during the period, treat this calculation as churn for the original cohort only, separate from new customer growth.

Yes. Any business with a defined customer base over a period, such as e-commerce repeat buyers, subscription boxes, or a specific support cohort, can use this calculator. Use the optional context field to note the exact segment or product you are measuring.

No. This calculator reports a historical, period-specific churn rate based on the numbers you provide. It does not forecast future churn or identify the underlying causes behind customer loss.