Updated SaaS & Business

Churn Rate Calculator

Measure customer churn, retention, and revenue churn (gross + net) in seconds. Forecast customers over time, estimate lifetime, and export a churn forecast table to CSV.

Customer churn Revenue churn NRR + GRR Forecast + CSV

Churn & Retention Toolkit

Choose a period, enter customer and MRR changes, then get churn %, retention %, NRR/GRR, and a forecast table you can export.

Tip: If you’re comparing months with very different growth, “Lost ÷ Average customers” often gives a steadier churn signal than “Lost ÷ Start.”
Tip: Gross churn shows how much revenue you’re losing. Net churn (or NRR) tells you whether expansion is offsetting that loss.
Forecast assumes churn rate is stable and applies to the starting base each period. If you add “New customers per period,” the model applies churn to the current base, then adds new customers.
Your forecast table will appear here after you build it.

Export Options

  1. Run the Customer Churn and/or Revenue Churn tabs to compute your rates.
  2. Build a Forecast to generate the period-by-period table.
  3. Use “Export Forecast CSV” to download a spreadsheet-ready file.
  4. Copy key metrics (churn, CRR, GRR/NRR) into reports and dashboards.
Copy includes: customer churn, retention, CRR, gross revenue churn, net revenue churn, GRR, NRR (when available).

Related Calculators