Churn Rate Calculator
Customer churn, retention and revenue retention.
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This churn rate calculator measures how many customers you lose. Enter customers at the start and end of a period and the new customers you won, and it shows churn and retention for the period, converts them to monthly and yearly figures, and, if you add recurring revenue figures, gross and net revenue retention.
What is a Churn Rate Calculator?
Churn rate is the share of customers who stop doing business with you during a period. Retention is the opposite: the share who stay. For subscription businesses, churn is one of the strongest drivers of growth and customer lifetime value.
Revenue churn matters too. Gross revenue retention (GRR) shows how much recurring revenue you keep from existing customers after cancellations and downgrades; net revenue retention (NRR) also adds upgrades. NRR above 100% means existing customers grow revenue even before new sales. This churn rate calculator shows all of these.
How does the Churn Rate Calculator work?
Customers lost equals start customers plus new customers minus end customers. Churn is customers lost divided by start customers. To compare periods, the rate is converted to a monthly equivalent and then a yearly one, assuming steady churn. GRR is starting revenue minus lost revenue, divided by starting revenue; NRR adds expansion revenue.
How to use the Churn Rate Calculator step by step
- Choose the period.
- Enter customers at start, new customers and customers at end.
- Read churn and retention.
- Optionally choose a currency and enter recurring revenue figures.
- Read GRR and NRR.
- Compare with previous periods.
Churn Rate Calculator example with real numbers
A SaaS company started the month with 1,000 customers, won 120 new ones and ended with 1,040. Its recurring revenue at the start was $50,000; it lost $3,000 to cancellations and downgrades and gained $4,000 from upgrades.
| Example input | Value |
|---|---|
| Period | Month |
| Customers at start | 1,000 |
| New customers during the period | 120 |
| Customers at end | 1,040 |
| Currency | US dollar ($) |
| Recurring revenue at start (optional) | 50,000 |
| Revenue lost to cancellations and downgrades (optional) | 3,000 |
| Expansion revenue from existing customers (optional) | 4,000 |
| Example output | Value |
|---|---|
| Customer churn rate | 8.00% |
| Customers lost | 80 |
| Monthly churn equivalent | 8.00% |
| Yearly churn equivalent | 63.2% |
| Average customer lifetime | 12.5 months |
| Gross revenue retention | 94.0% |
| Net revenue retention | 102.0% |
| Net customer growth | 4.00% |
The churn rate calculator shows monthly churn of 8.00%, or 63.2% a year. Net revenue retention is 102.0%, so upgrades more than offset lost revenue.
Key features of this Churn Rate Calculator
- Customer churn and retention
- Monthly and yearly conversion
- Average lifetime
- Gross and net revenue retention
- Net customer growth
Who should use the Churn Rate Calculator?
Who is this Churn Rate Calculator for?
- SaaS founders
- Customer success teams
- Subscription box and membership businesses
- Investors
Practical use cases
- Monthly reporting
- Comparing cohorts
- Investor updates
- Measuring a retention project
Key benefits
- Complete: customer and revenue churn.
- Comparable: period conversion.
- Clear: lifetime shown.
- Private: runs in your browser.
Tips for better results
- Track churn by cohort and plan.
- Separate voluntary churn from failed payments.
- Ask leaving customers why.
- Target NRR above 100%.
Common mistakes to avoid
- Dividing by end customers instead of start.
- Comparing monthly churn with annual churn.
- Ignoring revenue churn.
- Counting paused accounts as active.
Limitations of this Churn Rate Calculator
- Steady churn is assumed for conversions.
- Customers who join and leave in the same period are hard to capture.
- Segment differences are hidden.
Churn Rate Calculator vs other ways to calculate
| Metric | Formula |
|---|---|
| Customer churn | Lost ÷ Start customers |
| Retention | 1 − Churn |
| GRR | (MRR − Lost MRR) ÷ MRR |
| NRR | (MRR − Lost + Expansion) ÷ MRR |
To turn churn into customer value, use the customer lifetime value calculator. To see acquisition costs, try the CAC calculator.
Privacy and data handling
This Churn Rate Calculator runs entirely in your browser. The numbers you type are not sent to Qorico or stored on any server, and nothing is saved after you close the page. The Copy and Download buttons create the result on your own device. If the page has analytics turned on, it may count that a calculation happened, but it does not record the values you entered.
Churn Rate Calculator FAQs
How do I calculate churn rate?
Customers lost during a period divided by customers at the start of the period.
How do I convert monthly churn to annual?
Annual churn = 1 − (1 − monthly churn)^12. 2% monthly is about 21.5% a year.
What is a good churn rate?
For SaaS, many aim for under 2% monthly for small businesses and much lower for enterprise customers.
What is net revenue retention?
Revenue kept from existing customers after cancellations, downgrades and upgrades.
Can NRR be above 100%?
Yes, when upgrades from existing customers exceed lost revenue.
Is churn the same as attrition?
Yes, attrition is another word for churn.
Related tools
Sources and references
We checked the method and the current figures used in this Churn Rate Calculator against these official and primary sources:
- U.S. Small Business Administration
- SBA: Manage your business (finances)
- U.S. Census Bureau: Business data
- Startup India
Written and reviewed by the Qorico Team
