How to use the Net Revenue Retention Calculator
Net revenue retention measures what happened to recurring revenue from the customers you already had. Take the revenue those customers were paying at the start of the period, add expansion, subtract contraction and churn, and divide by the starting figure. The rule that matters most is that new customers are excluded. Mixing new business in makes the number look healthy while the existing base quietly erodes, which defeats the purpose of the metric.
The tool also reports gross revenue retention. GRR leaves expansion out and counts only contraction and churn, so by definition it cannot exceed 100%. Comparing the two tells you whether a strong NRR reflects genuine retention or upsells papering over departures. If you enter new customer revenue it is reported separately as total revenue growth, with a label that makes clear it is not NRR.
Choose monthly, quarterly or annual for the period. The annualized figure compounds the NRR shown on screen over the number of periods in a year, so it is derived from the displayed value rather than an unrounded one. Pick annual and no conversion is needed, which the label states rather than silently repeating the same number.
This page was written as of September 2026 and is for reference only. The same NRR reads very differently depending on customer mix and contract structure, so break the number down by cohort and review it with your finance team before acting on it.
Frequently Asked Questions
NRR asks how much the customers you already had are still paying, and whether they are paying more. Including new logos would hide a shrinking base behind fresh sales. The figure that includes them is reported separately as total revenue growth.
GRR counts only contraction and churn, so it can never exceed 100%. NRR adds expansion and can go above 100%. A wide gap between the two means upsells are masking churn rather than churn being solved.
The NRR shown on screen is converted to a decimal and raised to the number of periods in a year: twelve times for monthly, four times for quarterly. Because it starts from the displayed value, checking it by hand gives the same result.