Churn Calculator
Calculate monthly and annual customer churn rate, revenue churn, average customer lifetime, and see what churn rate means for your business health.
Part of our Business Calculators collection.
Churn Calculator
Free online calculator
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How to Use This Calculator
- 1
Enter starting customers and customers lost.
- 2
Optionally enter MRR data for revenue churn.
- 3
See monthly churn, annual churn, and average lifetime.
Churn Rate Formulas
Customer Churn % = Lost Customers / Starting Customers × 100 Revenue Churn % = Lost MRR / Starting MRR × 100 Avg Customer Lifetime = 1 / Monthly Churn Rate Annual Churn ≈ 1 − (1 − Monthly Churn)^12 Benchmarks: B2B SaaS < 1%/mo | B2C < 5%/mo
Example Calculation
Example: 500 customers, 15 churned in a month
Inputs
startCustomers: 500churnedCustomers: 15
Result
3% monthly churn | 30.6% annual | 33 month avg lifetime
15/500 = 3%. Annual: 1−(0.97)^12 = 30.6%.
Frequently Asked Questions
What's the difference between customer churn and revenue churn?
Customer churn counts lost customers regardless of size. Revenue churn measures lost MRR. Losing 10 small customers but retaining 1 large account can mean low revenue churn but high customer churn. Track both.
How do I reduce churn?
Improve onboarding to drive early value. Identify at-risk accounts via usage signals. Build in-app engagement. Create customer success programs. Regular check-ins for high-value accounts. Understand and fix top cancellation reasons.