Churn rate calculator

It takes Customers at start and Customers lost and derives Churn rate and Retention rate from them. The calculation is live as you type, so the result updates on every change.

2 values: Customers at start and Customers lost. Nothing else is required — no account, no file upload.

With Customers at start = 1,000 and Customers lost = 50, the calculator returns Churn rate = 5% and Retention rate = 95%. Those figures come from running this exact tool, so you can reproduce them by entering the same values.

Reporting to an investor or a board: what recurring revenue really is this month, what churn is costing, and how long it takes to earn back an acquisition.

Counting annual contracts at their full value in the month they are signed. MRR is the monthly-equivalent figure; booking a year of revenue in one month makes growth look like a step change that then reverses.

This one returns Churn rate and Retention rate; the Burn rate & runway calculator returns Runway (months) and Runway (years). That is the whole difference — open the one whose figure you need.

Customer lifetime value (CLV) calculator is the closest one after this: What a customer is worth over the whole relationship: margin per period ÷ (1 + discount − retention), which also tells you the average lifespan 1/(1 − retention). Higher retention and margin stretch it; the discount rate reins it back to today's money.

MRR & ARR calculator and Employee turnover rate calculator — they come up in the same task often enough to be worth a second tab.

These definitions come from how subscription businesses report, not from an accounting standard — churn in particular is defined half a dozen ways, so state which one you used alongside the number.