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Churn Rate Calculator

Calculate customer churn and retention for a month, quarter or year, and turn monthly churn into yearly.

Result

Enter your values and select Calculate to see the result.

Runs in your browser — nothing you enter is sent to a server.

How the Churn Rate Calculator works

Enter the customers you had at the start of a period, at the end, and how many new customers joined in between. Customers lost = start + new − end, and churn is that loss as a share of the starting customers. For monthly churn, the calculator also shows what it compounds to over a year.

Formulas

Churn rate

churn = (start + new − end) ÷ start × 100%

Yearly from monthly

yearly = 1 − (1 − monthly)12

Examples

A subscription app

1,000 subscribers, 100 new, 950 at month-end: 150 lost, 15% churn and 85% retention.

Monthly churn adds up

5% monthly churn means losing about 46% of customers over a year.

Frequently asked questions

What is a good churn rate?

It varies by industry; many subscription businesses aim for under 5% a month, and business software often far lower.

Why only count starting customers?

It keeps the rate comparable across periods; new customers who leave in the same period are counted in the next period's start.

How does churn relate to lifetime value?

Lower churn means longer customer lifetimes — see the Customer Lifetime Value Calculator.

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