Churn Rate & Net Revenue Retention Calculator

Measure retention and net revenue

For a subscription business, retention metrics reveal health that new sales alone hide. This calculator computes churn rate, gross retention and net revenue retention from your MRR movements, so you can see how well you keep and grow revenue.

Why NRR is the metric that matters most

Churn is the revenue lost from customers leaving; gross retention measures how much you keep; and net revenue retention (NRR) measures how much recurring revenue you retain including expansion from existing customers. NRR is the key figure because above 100% it means your existing customers grow in value faster than others leave, so revenue would rise even with no new sales, the hallmark of a strong subscription business. Below 100%, you must constantly acquire just to stand still. These metrics from MRR movements reveal the underlying health that top-line growth can mask.

A planning estimate

This is an estimate for planning from the figures you enter, not financial or business advice. Real outcomes depend on factors beyond any single calculation, so treat the result as a guide. The calculation runs entirely in your browser, so your figures are never uploaded and stay on your own machine, which matters for business numbers you would not want to share.

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