Churn Rate Calculator
Measure how many customers you lose. Enter the customers at the start of a period, those lost during it and, optionally, new customers and revenue per customer. The calculator shows the churn and retention rate, converts it to monthly and annual churn correctly – compounding rather than multiplying – and gives the average customer lifetime, the revenue lost and the revenue-based lifetime value.
- Runs in your browser
- No sign-up
- Free to use
How to use Churn Rate Calculator
- Enter customers at the start and lost.
- Choose the period length.
- Add new customers and revenue per customer.
- Read churn, retention and lifetime.
Churn Rate Calculator features
Monthly and annual
Converted with compounding.
Retention
The other side of churn.
Lifetime
1 ÷ monthly churn.
Revenue impact
Revenue lost and LTV.
Formula shown
Every result explains how it was calculated.
Any currency
Choose from 30+ currencies; amounts are formatted for it.
When to use Churn Rate Calculator
- SaaS and subscription reporting.
- Membership and gym businesses.
- Telecom and utilities.
- Comparing cohorts.
Churn Rate Calculator FAQ
Why not multiply monthly churn by 12?
Because each month’s churn applies to fewer customers. 4.5% a month is about 42% a year, not 54%.
Should new customers be in the denominator?
Standard churn uses customers at the start of the period, so new customers do not hide losses.
What is a good churn rate?
For B2B SaaS, under 1–2% a month is strong; consumer subscriptions are often higher.
What is revenue churn?
The share of revenue lost, which can differ from customer churn when large customers leave.
Why churn matters so much
Churn sets the ceiling on growth and the lifetime value of every customer. Halving churn doubles customer lifetime, which often matters more than any marketing improvement.
Look at churn by cohort and plan: new customers usually churn more than long-standing ones.
Use consistent definitions over time: count customers and revenue the same way every month, separate one-off fees from recurring revenue, and compare cohorts rather than mixing old and new customers.
Benchmarks from other companies are only a rough guide, because business models, prices and customer types differ. Your own trend from month to month is usually more informative than a comparison with an industry average.