Sales & marketing
Customer cohort retention Calculator
Separate retained customers from new acquisitions and calculate churn. This free customer cohort retention calculator shows the calculation and its assumptions so you can compare your own figures.
Your results
Separate retained customers from new acquisitions and calculate churn.
Calculated outcomes
- Retained Customers
- 460
- Lost Customers
- 40
Assumptions and estimates
- Assumes newly acquired customers counted here remain active at period end; use cohort data if new customers also churned during the period.
- Method: Retained original customers = ending customers − new customers. Retention = retained ÷ starting cohort.
- New customers must be active at period end; use cohort data when newly acquired customers also churn during the period.
Useful next steps
- Use Compare options to test an alternative side by side.
- Copy, print or download a record of this calculation when you need one.
Reports open your email app addressed to s@s1.ie with the public page address only. Your inputs are never added.
How the customer cohort retention calculation works
Retained original customers = ending customers − new customers. Retention = retained ÷ starting cohort.
New customers must be active at period end; use cohort data when newly acquired customers also churn during the period.
Using this calculator
- Enter your own figures in the labelled inputs. Keep the currencies, units and time periods consistent.
- Choose any applicable rate profile, pattern or assumption shown for this tool. Open additional inputs when relevant.
- Review retention percent and churn percent and net customer growth percent, then read the stated assumptions and eligibility conditions before using the result.
Worked example
This is a static example using illustrative inputs, not facts about you or today’s date. The displayed eligibility selections and assumptions apply only to this example.
See example inputs
- Customers at period start
- 500
- Customers at period end
- 540
- New customers active at period end
- 80
- Retention Percent
- 92%
- Churn Percent
- 8%
- Net Customer Growth Percent
- 8%