The sum of losses minus gains in revenue from existing customers only (exclding new customers), divided by total revenue from the previous time period. Net churn is the sum of losses minus gains in revenue from existing customers only (i.e., excluding new customers) divided by total revenue from the previous time period. [1]
[1] Retrieved May 21, 2021, from https://www.productboard.com/blog/growth-accounting-to-measure-product-market-fit/
[2] A Quantitative Approach to Product Market Fit, https://tribecap.co/a-quantitative-approach-to-product-market-fit/
[3] 34 Types of Startup Metrics to Measure (with Examples). Retrieved May 21, 2021, from https://startupdevkit.com/types-of-startup-kpis-metrics-to-measure-with-examples/