Churn Rate Calculator
Measure customer churn, retention, and expected lifetime.
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How it works
Churn rate = customers lost ÷ customers at the start × 100. Do not count customers who joined during the period. Lifetime is roughly 1 ÷ churn rate: a 5% monthly churn means customers stay about 20 months on average.
FAQ
Is this calculator free?
Yes. No signup is needed and nothing you enter is stored.
Is the result exact?
Results are rounded for display. For financial, medical, or legal decisions, confirm with a professional.
Do my numbers leave my device?
No. The calculation runs in your browser.