Churn Calculators Monthly and Annual Churn CalculatorThis calculator shows you your monthly churn rate and projects your annual churn rate. (Do not include new customers acquired during the month.) Number of customers at the start of the month*Number of customers who left during the month*Monthly Churn RateProjected Annual Churn RateThe Cost of ChurnEnter your Average Monthly Revenue per Customer to see how much you are losing monthly and annualized.Average Monthly Revenue per CustomerLost Revenue per MonthAnnualized Lost RevenueThe Cost to ReplaceEnter your Cost of Acquisition to see how much you must spend to replace the lost customers next month.Cost of AcquisitionCost to Replace Lost Customers Each MonthAnnualized Cost to Replace Lost Customers