🔁 Churn Rate Calculator
Churn rate is the share of customers who leave during a period. It is a key number for subscriptions, SaaS and memberships.
How the Churn Rate Calculator works
Customers lost during the period are divided by customers at the start. Average lifetime is 1 ÷ churn rate, and yearly churn compounds a monthly rate over 12 months.
Step-by-step calculation
- 1Enter customers at the start.
- 2Enter customers lost.
- 3Divide lost by start.
Worked example
Losing 50 of 1,000 customers in a month is a 5% monthly churn (95% retention), an average lifetime of 20 months and about 46% yearly churn.
Churn Rate Calculator examples
| Customers at start of period | Churn rate |
|---|---|
| 500 | 10% churn |
| 750 | 6.67% churn |
| 1,000 | 5% churn |
| 1,250 | 4% churn |
| 1,500 | 3.33% churn |
Other inputs kept at the calculator's default values. Results calculated by this calculator.
Why use a Churn Rate Calculator?
Track customer retention for subscriptions and memberships.
Important factors that can affect your results
- Period length.
- New customers excluded.
- Seasonal cancellations.
Frequently asked questions
Should new customers be counted?
Not in the basic formula. Use customers at the start of the period and those of them who left.
What is a good churn rate?
For consumer subscriptions, a few percent a month is common; business software often aims for under 1% a month.
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Last reviewed November 2026 · How we build and check our tools · Report a problem