How do I calculate the proportion of customers lost in a period?

You should use the `customer_churn_rate_calculator` tool. This function requires two inputs: the starting customer count and the ending customer count to determine the volume loss percentage.

What is NRR, and how does it account for growth?

NRR accounts for both losses and gains. You calculate this using the `net_revenue_retention_calculator` tool, providing the starting ARR, lost revenue value, and crucially, the expansion revenue from existing clients.

Does this system provide a general health score?

Yes. After running the core metrics, you must use the `analyze_churn_health` tool. This function compares your calculated rates against industry benchmarks (SaaS/ECommerce) to classify your company's overall retention health.

Churn Rate Calculator MCP Connector for Claude

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Calculate Customer Churn Rate, Revenue Churn Rate, and Net Revenue Retention (NRR) to instantly assess account health against industry benchmarks.

4 tools Official Updated Jun 28, 2026 Official Vinkius Partner

More Details Connect to Claude

Finding out why customers leave or why revenue shrinks is critical for business stability. Many companies track raw churn numbers, but they fail to connect lost users to financial impact or account growth momentum. This system solves that by providing a comprehensive view of retention health.

Mechanism: The agent connects three core calculations: 1) Customer Churn Rate (CCR), which tracks volume loss using the customer_churn_rate_calculator tool; 2) Revenue Churn Rate (RCR), assessing monetary value loss via the revenue_churn_rate_calculator tool; and 3) Net Revenue Retention (NRR), incorporating expansion revenue through the net_revenue_retention_calculator. Finally, it synthesizes all this data into a clear classification using the analyze_churn_health tool.

Advantage: Instead of just knowing that you lost customers, you know how much that loss costs and whether your expansion efforts are enough to offset contraction. The result is an actionable health score (World-Class, Healthy, or Needs Improvement).

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