6.00% is the example result. Read it using the units and relationship stated below.
Churn Rate uses customers lost, starting customers.
Comparing financial amounts on a defined basis
For churn rate, the relationship is Result = (([Customers lost]) ÷ ([Starting customers])) × 100. The amount depends on the supplied customers lost, starting customers, rather than a live market price or a value imported from another record. A financial model is useful when its cash amounts, rate convention and time horizon describe the same case. Interest, return and purchasing power are different outputs. A projection should remain separate from an observed or audited balance.
What the model includes
Result = (([Customers lost]) ÷ ([Starting customers])) × 100 Check whether a rate is annual, monthly, simple or compounded. Enter fees only where the form represents them and identify contractual charges that remain outside the estimate. A monthly payment alone does not establish affordability or total ownership cost. Use the result to prepare the next question about terms or assumptions. Tax treatment, lender conditions and valuation evidence require the relevant source documents; they cannot be recovered from a few numeric inputs.
Example with the supplied inputs
Customers lost: 12; Starting customers: 200. Result: 6.00%. The values are illustrative.
Compare one changed input
Customers lost changes from 12 to 13.2. The result becomes 6.60%. All other inputs remain fixed.
Calculation rule
Result = (([Customers lost]) ÷ ([Starting customers])) × 100
Inputs and output
| Input | Example value | Entry convention |
|---|---|---|
| Customers lost | 12 | Use the source quantity represented by customers lost. Keep the counted population fixed and avoid mixing a unit value with a period total. |
| Starting customers | 200 | Use the source quantity represented by starting customers. Keep the counted population fixed and avoid mixing a unit value with a period total. |
Output: 6.00% is the example result. Read it using the units and relationship stated below. Use the formula to distinguish a cash amount, count, percentage or ratio.
How to use the page
Collect the inputs
Gather Customers lost, Starting customers. Use one period and the units shown in the form.
Run the calculation
Enter the values and select the action. The calculation rule above explains how the inputs produce the result.
Compare a scenario
Change Customers lost on its own, keeping the other inputs fixed. Read both results before changing another assumption.
Worked example
With the example inputs listed above, the result is 6.00%.
Change Customers lost from 12 to 13.2 while keeping every other value fixed. The result becomes 6.60%. This comparison isolates that input; it does not forecast how other variables will respond.
Check the stated formula, units and limits before using the result in a decision.
Keep the displayed formula, input units and model scope with the result. Corrections or questions can be sent through the request section on this page.
Content updated: October 11, 2026