Churn Rate Calculator
Fill in the values and the answer updates as you type.
How the Churn Rate Calculator works
Churn rate = customers lost ÷ customers at the start × 100. Do not count customers who joined during the period. Lifetime is roughly 1 ÷ churn rate: a 5% monthly churn means customers stay about 20 months on average.
Inputs and results
The Churn Rate Calculator takes 3 inputs and gives 5 results.
What you enter
- Customers at start of period — starts at 1000.
- Customers lost during the period — starts at 50.
- Average revenue per customer per period ($) — starts at 40.
What you get
- Churn rate
- Retention rate
- Average customer lifetime (periods)
- Revenue lost to churn
- Yearly churn if this is a monthly rate
Example: Churn Rate Calculator with the starting values
With customers at start of period 1000, customers lost during the period 50 and average revenue per customer per period 40 $, the calculator returns:
| Churn rate | 5% |
|---|---|
| Retention rate | 95% |
| Average customer lifetime (periods) | 20 |
| Revenue lost to churn | $2,000 |
| Yearly churn if this is a monthly rate | 45.96% |
Change any value above and the results update straight away.
Churn Rate Calculator FAQ
How do I use the Churn Rate Calculator?
Enter customers at start of period, customers lost during the period and average revenue per customer per period in the fields, then read churn rate, retention rate, average customer lifetime (periods) and revenue lost to churn in the result panel. The answer updates as you type, and you can press Calculate or Enter to refresh it. Use “Copy link” to share your exact numbers with someone else.
What does the Churn Rate Calculator calculate?
Measure customer churn, retention, and expected lifetime. It returns churn rate, retention rate, average customer lifetime (periods) and revenue lost to churn from the 3 values you provide.
What values does the Churn Rate Calculator start with?
It opens with customers at start of period 1000, customers lost during the period 50 and average revenue per customer per period 40 $ so you can see a working result straight away. Replace them with your own numbers, or press Reset to return to these starting values.
Is the Churn Rate Calculator free and private?
Yes. It is free, needs no account, and runs in your browser, so nothing you type is sent to or stored on our servers. See the Privacy Policy for details.
Can I rely on the Churn Rate Calculator for financial decisions?
Treat the result as a well-rounded estimate. Real situations often have details a general calculator cannot know, so confirm financial decisions with a qualified professional. See the Disclaimer for more.