Churn Rate Calculator
Churn quietly caps your growth. Enter customers lost over a period to get your churn and retention rates and what they imply for customer lifespan.
Example: with Customers at start of period 1000 · Customers lost in the period 50 · Period Monthly → Churn rate: 5.0% / mo.
- Retention rate95.0%
- Implied avg lifespan20 months
- Annualized churn46.0% / yr
Computed by the calculator below using its default values. Change any input to see your own numbers.
Retention and churn-analysis tools
Learn moreSmall churn, big compounding
Churn compounds against you: 5% monthly churn means you lose nearly half your customers in a year. Because average lifespan is the inverse of churn, shaving even a point off churn meaningfully extends how long — and how profitably — customers stay.
How it’s calculated & sources
Churn = customers lost ÷ customers at the start. We convert to a monthly figure, derive lifespan as 1 ÷ monthly churn, and annualize churn by compounding the monthly rate over 12 months.
Benchmark: healthy SaaS monthly churn is roughly 3–5% (lower for annual plans and enterprise); lifespan ≈ 1 ÷ churn.
Results update as you type and are general estimates, not personalized financial, tax, medical or legal advice. Verify with a professional.
Frequently asked questions
Customer churn or revenue churn?
This measures customer (logo) churn. Revenue churn weights by spend and can differ a lot if big accounts behave differently. Track both.
Is negative churn possible?
Yes — if expansion from existing customers outweighs losses, net revenue retention can exceed 100%, a hallmark of strong SaaS businesses.