About the Customer Growth Calculator
Net customer growth rate after churn, and the customer count projected forward month by month.
Also known as: customer base growth, net customer growth.
How to use this calculator
- Enter customers now, new customers per month, monthly churn, months ahead.
- The result updates instantly as you type — press Calculate (or Enter) at any time.
- Review the breakdown shown under the main result.
- Use Copy result or Share to save the answer or send a link with your inputs.
Formula
Cₙ₊₁ = Cₙ(1 − churn) + new
Worked example
Using the values pre-filled in the calculator above:
- Customers now = 1,500
- New customers per month = 180
- Monthly churn = 3 %
- Months ahead = 12
the calculator returns:
- Customers after period: 2,878
- Steady-state customers: 6,000
- Growth: 91.85%