Churn Rate Calculator

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Calculate customer churn rate, retention rate, and projected annual churn for any period.

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About Churn Rate Calculator

Enter the number of customers at the start of a period and the number lost during that period to instantly calculate your churn rate and retention rate. Choose monthly, quarterly, or annual periods and see the projected annualised churn. A key metric for SaaS, subscription businesses, and customer success teams.

How to use

  1. Set the number of customers at the start of the period using the "Customers at Start" option.
  2. Enter the number of customers lost during the period.
  3. Select the period (monthly, quarterly, or annually) and review the calculated churn, retention, and projected annual churn.

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Frequently Asked Questions

FAQs about Churn Rate Calculator

What is churn rate?

Churn rate is the percentage of customers who stop using your product during a given period. It is calculated as (customers lost ÷ customers at start) × 100.

What is a good monthly churn rate for SaaS?

For B2B SaaS, a monthly churn rate below 1% is considered healthy. Rates between 2–5% monthly are typical for earlier-stage companies but warrant attention.

How is projected annual churn calculated?

For monthly churn, annual churn is approximated as 1 − (1 − monthly_rate)^12. For quarterly churn it uses (1 − rate)^4. Annual input is used directly.

What is retention rate?

Retention rate is the inverse of churn rate: 100% − churn rate. It represents the proportion of customers who stayed during the period.

Is my data safe?

All calculations run entirely in your browser. No data is sent to any server.