Churn Rate Calculator
Calculate churn and retention rate for a period. This free online business & marketing calculator runs entirely in your browser — no signup, no data sent anywhere.
Inputs
Results
How It Works (Formula & Method)
Churn rate is customers lost divided by customers at the start of the period, as a percentage. Retention rate is 100% minus churn. Small differences compound quickly, so even a few points of churn strongly affect long-term growth.
Worked Example
Below is a worked example using the calculator's default values. The same numbers are pre-filled in the form above so you can press Calculate and see the result without typing anything.
Inputs used:
- Customers at Start: 500
- Customers Lost: 25
With these inputs, the calculator computes the metrics shown in the Results panel. Change any value and press Calculate again to see how the result responds — the live widget and the chart both update instantly.
Frequently Asked Questions
What does the Churn Rate Calculator compute?
The Churn Rate Calculator takes 2 input values and returns 2 results. Calculate customer churn rate and its mirror, retention rate, from the customers you started with and the number you lost in a period.
Is my data sent to a server?
No. The Churn Rate Calculator runs entirely in your browser using static JavaScript. Your inputs are never transmitted to CalculatorHive or any third party, and nothing is stored after you close the page.
Is this calculator free to use?
Yes. Every calculator on CalculatorHive is completely free. There is no signup, no paywall, and no usage limit. The site is supported by display advertising and affiliate partnerships, which are clearly labeled.
How accurate is the result?
The math is mathematically exact for the inputs you provide. Real-world accuracy depends on how accurately your inputs reflect the real situation — defaults are typical values, not guarantees.