Grow Social · Free tools

Churn Calculator: understand retention and revenue loss

Calculate customer churn, revenue churn and net revenue retention for a monthly period.

How to use

  1. Enter customers at the start of the month and customers lost.
  2. Optionally enter starting MRR, lost MRR and expansion MRR from the starting customer cohort.
  3. Read logo churn, revenue churn and net revenue retention.
  4. Use the implied lifetime as a rough input for your LTV planning.

Exclude new-customer revenue from expansion MRR. Implied lifetime assumes monthly churn remains constant.

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Logo churn
–Revenue churn
–Net revenue retention
–Implied lifetime
Enter your numbers Add starting customers and customers lost to calculate churn for the period.

Logo churn = customers lost ÷ customers at start. Revenue churn uses MRR the same way. Net revenue retention above 100% means expansion outpaced churn — the hallmark of healthy SaaS.