Calculate customer churn rate, retention rate, and customers retained from customers lost and starting count.
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Quick answers to common questions
Churn Rate = (Customers Lost ÷ Customers at Start of Period) × 100%.
For B2B SaaS, under 5% monthly churn is strong. Consumer apps vary widely. Lower is always better.
This calculator measures customer churn. Revenue churn uses MRR lost — use our MRR Calculator for subscription revenue.
Yes. Client-side only.
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