Calculate Customer Churn Rate
Example Data Table
| Period |
Start Customers |
Lost Customers |
New Customers |
Reactivated |
Gross Churn |
Net Churn |
| January |
1,000 |
75 |
120 |
15 |
7.50% |
6.00% |
| February |
1,060 |
62 |
105 |
20 |
5.85% |
3.96% |
| March |
1,123 |
81 |
132 |
18 |
7.21% |
5.61% |
Formula Used
Gross customer churn rate:
Churn Rate = Lost Customers ÷ Starting Customers × 100
Net customer churn rate:
Net Churn = (Lost Customers − Reactivated Customers) ÷ Starting Customers × 100
Retention rate:
Retention Rate = (Starting Customers − Lost Customers) ÷ Starting Customers × 100
Revenue churn rate:
Revenue Churn = Lost Revenue ÷ Starting Revenue × 100
Annualized churn:
Annualized Churn = [1 − (1 − Period Churn)365 ÷ Period Days] × 100
How To Use This Calculator
Enter the number of customers at the start of the period.
Add the number of customers lost during that period.
Enter new and reactivated customers for net movement analysis.
Add ending customers if your finance or CRM report provides them.
Enter average revenue per customer to estimate lost revenue.
Add previous and target churn rates for comparison.
Press the calculate button. The result appears above the form.
Use the CSV or PDF buttons to save your report.
Customer Churn Rate Guide
What Customer Churn Means
Customer churn shows how many customers leave during a set period.
It is one of the most important growth signals.
A business may gain new customers and still struggle.
That happens when existing customers leave too quickly.
Churn helps teams see this hidden leak.
It also links product quality, support, pricing, and loyalty.
Why Churn Rate Matters
A low churn rate protects revenue.
It also lowers pressure on sales teams.
Keeping current customers is often cheaper than replacing them.
Churn also affects forecasting.
Investors, managers, and marketers review it closely.
A rising churn rate may show poor onboarding.
It may also show weak service or wrong pricing.
Gross Versus Net Churn
Gross churn counts every customer lost.
It is simple and direct.
Net churn adjusts the number using reactivated customers.
This gives a more balanced view.
Both numbers are useful.
Gross churn shows the loss problem.
Net churn shows the recovery effect.
Revenue churn adds another layer.
It shows the money connected with lost accounts.
How To Improve Churn
Start by finding patterns.
Compare churn by plan, region, channel, or customer type.
Review support tickets and cancellation reasons.
Improve onboarding for new users.
Send early warning messages to inactive customers.
Offer save plans before cancellation.
Track product usage each week.
A small churn drop can create large gains.
Use this calculator each month.
Save reports and compare periods.
Strong retention creates steadier growth and better planning.
FAQs
1. What is customer churn rate?
Customer churn rate is the percentage of customers lost during a chosen period. It helps show how quickly customers leave your business, product, or service.
2. What is a good churn rate?
A good churn rate depends on industry, price, and customer type. Many subscription businesses aim for lower monthly churn because it supports stable revenue.
3. Should I use starting or ending customers?
The common formula uses starting customers. This keeps the calculation focused on customers who were at risk during the selected period.
4. What is net churn?
Net churn adjusts lost customers by subtracting reactivated customers. It shows the remaining customer loss after win-back activity is included.
5. What is revenue churn?
Revenue churn measures the percentage of starting revenue lost from churned customers. It is useful when customers have different spending levels.
6. Why is annualized churn useful?
Annualized churn converts a short-period churn rate into an estimated yearly impact. It helps compare monthly, quarterly, and custom periods more clearly.
7. Can this calculator forecast customer loss?
It estimates annualized churn and replacement needs. For deeper forecasting, combine this result with cohort trends, usage data, and cancellation reasons.
8. How often should I calculate churn?
Most businesses calculate churn monthly. High-volume products may review it weekly to catch retention problems before they become serious.