Churn Rate Calculator
Calculate customer churn, retention, and projected customer loss.
This page is an editable estimator with realistic defaults so you can model your own situation in minutes.
Churn rate = lost customers / starting customers.
Treat the result as a planning estimate and verify important numbers with the relevant official source before acting.
| Starting customers | 2,500 | |
|---|---|---|
| Lost customers | 125 | |
| New customers | 180 |
Assumptions
- Use current platform dashboards, fee pages, processor statements, and accounting records where possible.
- Attribution windows, refunds, chargebacks, taxes, discounts, currency conversion, plan tiers, and category rules can change real results.
- This is a planning estimate, not financial, tax, legal, accounting, platform, or advertising advice.
How this calculator works
Formula used
Churn rate = lost customers / starting customers.
Example calculation
Plug in your own numbers and the result updates instantly. Churn rate = lost customers / starting customers.
Churn Rate Calculator FAQ
Is this churn rate calculator exact?
No. It is an educational estimate. Actual platform fees, ad reporting, attribution, taxes, refunds, chargebacks, discounts, subscriptions, and product costs can change the result.
Why are the rates editable?
Ad platforms, payment processors, marketplaces, and ecommerce platforms change fees and rules over time. Editable assumptions let you match your current account, country, plan, category, and contract.
What should I verify before making decisions?
Check your platform dashboard, processor agreement, marketplace category, ad reports, product costs, shipping costs, taxes, refunds, and accounting records before changing pricing or spend.