Free Churn Rate Calculator for SaaS & eCommerce
Learn how to calculate churn rate in seconds with this free online tool. Instantly measure your customer retention performance - no setup or login required
How to Use the Churn Rate Calculator
Select between Customer Churn (for tracking customer count) or Revenue Churn (for tracking MRR/ARR). This determines what metrics you'll be measuring.
Input the number of customers (or revenue) at the start of the period, at the end of the period, and new customers (or revenue) acquired during the period. Hover over the help icons for detailed explanations.
Choose the measurement period: Monthly, Quarterly, or Yearly. For monthly calculations, the tool will also show annualized churn rate automatically.
Click "Calculate Churn Rate" to see your churn rate, retention rate, lost customers, and actionable insights. Export results as CSV or copy to clipboard for further analysis.
Why Use Our Churn Rate Calculator?
Instant calculations without Excel. Completely free tool with no registration or installation required.
Uses industry-standard formulas with support for customer churn, revenue churn (MRR/ARR), and multiple time periods.
Get immediate results with detailed breakdown, retention metrics, and personalized tips to reduce churn.
Copy results to clipboard or export as CSV for presentations, reports, and further analysis.
Understanding Churn Rate Metrics
Churn Rate is the percentage of customers who stop using your product or service during a specific time period. It's a critical metric for assessing business health and customer retention.
Formula: Churn Rate = (Lost Customers / Customers at Start) × 100%
Retention Rate is the inverse of churn rate, showing the percentage of customers who continued using your product during the period. Higher retention means better customer loyalty.
Formula: Retention Rate = 1 - Churn Rate
The actual number of customers who left during the period. Calculated by accounting for both new acquisitions and final customer count.
Formula: Lost = Customers at Start + New Customers - Customers at End
Instead of tracking customer count, revenue churn measures the percentage of recurring revenue lost. This is particularly useful for businesses with variable pricing or upsell opportunities. Switch to "Revenue Churn" mode to calculate MRR (Monthly Recurring Revenue) or ARR (Annual Recurring Revenue) churn.
For monthly churn calculations, annualized churn projects your churn rate over a full year. This helps compare monthly data to annual benchmarks and understand long-term retention trends.
Formula: Annualized = 1 - (1 - Monthly Churn)^12
Churn Rate Calculator FAQ
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