Accounting Churn Rate (Per-Unit) Calculator FAQ
Answers to common questions about per-unit churn reconciliation, gross churn, retention, monthly equivalents, and input data.
This FAQ explains what the per-unit churn calculator measures, how its results are derived, and how to use unit counts consistently in operational reporting.
General Churn Questions
Basic definitions and uses of the calculator.
What is per-unit churn?
Per-unit churn is the share of opening active units estimated to have been lost during a reporting period. Units may be accounts, subscribers, seats, members, or another consistently defined item.
What does this calculator measure?
It estimates churned units, gross unit churn, opening unit retention, monthly equivalent churn, and net unit change from opening, additions, closing, and period inputs.
Is unit churn the same as revenue churn?
No. Unit churn counts lost units, while revenue churn measures lost revenue. They can move differently when units have different values.
Calculation Questions
How the calculator derives its main outputs.
How are lost units reconciled?
Lost units equal opening units plus new units added minus closing units. If that result is negative, the calculator reports zero churn.
How is gross churn rate calculated?
Gross churn rate is churned units divided by opening units, multiplied by 100.
How is retention calculated?
Opening unit retention equals retained opening units divided by opening units. In the standard reconciliation, it is 100% minus gross churn.
Why does the calculator use compounding for monthly equivalent churn?
Compounding converts total period attrition into an equivalent monthly rate while preserving the same cumulative loss over the full period.
Inputs and Data Quality
How to prepare consistent unit-count inputs.
What should count as a new unit added?
Use units acquired or activated during the period under your reporting definition. Apply the same treatment consistently across periods.
How should reactivated units be handled?
Follow a documented reporting policy. Reactivations can otherwise create a reconciliation difference if they are omitted or treated inconsistently.
What if closing units are greater than opening units plus additions?
Review the reconciliation for data timing, reactivations, transfers, classification changes, or omitted additions. The calculator caps churn at zero rather than reporting a negative loss.
Can I enter a reporting period longer than one month?
Yes. Enter the number of whole months between the opening and closing counts. The calculator will show period churn and a monthly equivalent.
Interpreting Results
How to distinguish the calculator outputs.
What is the difference between gross churn and net unit change?
Gross churn isolates estimated losses from the opening base. Net unit change compares closing units with opening units after additions and losses.
Does a positive net unit change mean retention is strong?
Not necessarily. A positive net change may result from strong acquisition even when losses from the opening base are substantial.
Can I compare churn rates across periods?
Yes, if unit definitions and inclusion rules are consistent. Monthly equivalent churn can help when the periods have different lengths.
How are churned units calculated?
Churned units equal opening units plus new units added minus closing units, with negative results capped at zero.
Explore Related Questions
Ready to see what you can calculate?
Open the calculator and get personalized results in seconds.