Churn Rate Calculator
Calculate monthly customer or revenue churn rate.
Churn Rate Calculator
Live result
Monthly churn
3%
Annual churn (approx)
30.62%
What it is
Churn rate is the silent killer of SaaS — small monthly numbers compound into giant annual losses.
The formula
Monthly churn = Customers lost ÷ Customers at start × 100
Why it matters
5% monthly churn ≈ 46% annual churn. Halving churn often doubles LTV.
Worked examples
Try the example
Use the defaults above as a starting point — then adjust the inputs to match your situation.
Common pitfalls
- Double-check the units on every input — most errors come from mixing units.
- Round at the end, not in the middle of the formula.
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Frequently asked questions
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