Churn Rate Calculator

Calculate monthly customer or revenue churn rate.

Interactive calculator
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.

Software based on your result

Hand-picked tools we'd actually pay for. Free where possible.

CRM
HubSpot

Free CRM with the deepest free tier on the market.

See all picks

Frequently asked questions

Related calculators

LTV Calculator

Calculate LTV, expected customer lifetime, and the LTV : CAC ratio investors care about.

Open
CAC Calculator

Calculate blended CAC, payback period, and the rough LTV : CAC ratio.

Open
Weekly playbook

One actionable business calculation every Tuesday.

Real frameworks for pricing, hiring, and software ROI. No fluff. Unsubscribe in one click.

See all 64 calculators →