How we worked it out
Updated as you change the numbers.
- Lost = start + new − end. Churn = lost ÷ start. Retention = (end − new) ÷ start.
Method and assumptions
Monthly churn compounds: 3% a month is about 31% a year (1 − 0.97¹²).
Questions
What is the churn if 1,200 customers become 1,250 after gaining 180?
10.8%: 130 customers were lost.
Sources
Method and figures checked on . Every worked answer on this page is covered by an automated test. Found a mistake? Tell us.