The method
How it is worked out
Churn = LostStart × 100
- Lost
- Customers lost in the period
- Start
- Customers at the start
Churn Rate Calculator
Calculate customer churn rate from customers at the start of a period and customers lost. The result updates as you type so you can compare scenarios quickly.
Keep in mind
What it leaves out
- New customersCustomers who joined and left in the same period skew the rate.
- Revenue churnLosing big customers hurts more than the count shows.
- Period lengthMonthly and yearly churn aren't comparable directly.
Use the calculator to compare scenarios rather than as a guaranteed forecast.
About the Churn Rate Calculator
Measure the share of customers lost from the population you had at the start of a period. This helps a subscription team distinguish growth in new sign-ups from its ability to retain the customers it already serves.
How it works and an example to tryShow less
How to use the result
Divide customers lost during the period by customers at the start and multiply by 100. The tool also illustrates what would remain if the same loss rate repeated each period. Specify whether the inputs cover a month, quarter or year; a monthly rate should not be compared directly with an annual one. It measures customer count, not lost recurring revenue.
Example to try
Begin with 5,000 customers and enter the number who cancelled during one month. Change only the losses to see how the projected retained base changes over repeated months. Compare that result with revenue churn if larger customers cancel at a different rate.
Put it to work
Try it on a real situation
Load an example
What moves the result most
Worked out from your figures above. Tap a row to try it.
Who uses it, and when
Subscription businesses tracking retention, customer-success teams setting targets, and founders who suspect strong sign-ups are masking customers leaving.
Mistakes worth avoiding
- Counting customers who joined and left within the period in both numbers.
- Comparing a monthly churn rate with a competitor's annual figure.
- Ignoring revenue churn when your largest customers are the ones leaving.
Questions
What does the Churn Rate Calculator do?
Calculate customer churn rate from customers at the start of a period and customers lost.
How should I use the result?
Divide customers lost during the period by customers at the start and multiply by 100. The tool also illustrates what would remain if the same loss rate repeated each period. Specify whether the inputs cover a month, quarter or year; a monthly rate should not be compared directly with an annual one. It measures customer count, not lost recurring revenue.
Does TechBullion store the information I enter?
The core calculation or transformation runs in your browser. Normal website security and analytics may still record page-level events, but the tool does not need to create a public record from your inputs.
What mistakes do people make with a churn rate calculator?
Counting customers who joined and left within the period in both numbers. Comparing a monthly churn rate with a competitor's annual figure. Ignoring revenue churn when your largest customers are the ones leaving.
Is the result guaranteed?
No. Use the result as a practical check or planning aid and verify important decisions with the relevant primary source, provider or professional advice.
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Calculator results are estimates based on the figures entered and are not financial, investment, legal or tax advice.