Decision calculator
Customer Churn Rate Calculator
Measure period churn, convert it to monthly and annual equivalents, and see average lifetime, customer half-life, and a 24-month cohort retention curve.
Modeled result
Calculating…
Results update as you change the inputs.
Methodology and assumptions
Period churn = customers lost ÷ customers at the start × 100; new customers are excluded from the denominator. Monthly equivalent = 1 − (1 − period churn)^(1 ÷ months); annualized = 1 − (1 − monthly)^12. Average lifetime = 1 ÷ monthly churn; half-life = ln 0.5 ÷ ln(1 − monthly churn). The cohort curve assumes constant churn.
Currency outputs are rounded to the nearest minor currency unit.
Pricing last verified:
Frequently Asked Questions
What does the Customer Churn Rate Calculator calculate?
Measure period churn, convert it to monthly and annual equivalents, and see average lifetime, customer half-life, and a 24-month cohort retention curve.
How accurate is the Customer Churn Rate Calculator?
It is a planning estimate based on the inputs, formula, assumptions, and sources shown on this page. Actual prices, invoices, taxes, discounts, and outcomes can differ.
Which pricing source does the Customer Churn Rate Calculator use?
The calculator links to Stripe churn guidance as its official source. The displayed pricing or reference data was last verified on 2026-10-01.
Are calculator inputs saved or sent to analytics?
Inputs are processed in your browser. Calculator values are not included in analytics events.