What is this tool?
Model your MRR trajectory over 36 months at different churn and growth rates. See exactly when your business dies — or thrives — based on retention.
Our free Churn Death Calculator is designed to help founders and vibe coders make data-driven decisions. By understanding this metric, you can better architect your business model and ensure long-term sustainability.
How It Works
The Formula: Monthly MRR = Previous MRR × (1 - Churn%) + New MRR from Growth%
To use this tool, you'll need:
- Starting MRR ($)
- Monthly Churn Rate (%)
- Monthly New MRR Growth (%)
Why It Matters for Your Startup
Most founders underestimate churn's compounding damage. 5% monthly churn equals 46% annual churn — you'll replace nearly half your customers every year just to stay flat.
Frequently Asked Questions
What is the Churn Death Calculator?
Model your MRR trajectory over 36 months at different churn and growth rates. See exactly when your business dies — or thrives — based on retention.
Why should I use the Churn Death Calculator?
Most founders underestimate churn's compounding damage. 5% monthly churn equals 46% annual churn — you'll replace nearly half your customers every year just to stay flat.
How is the Churn Death Calculator calculated?
The Churn Death Calculator is calculated using the following formula: Monthly MRR = Previous MRR × (1 - Churn%) + New MRR from Growth%.