How do you calculate NRR?

NRR = (starting recurring revenue + expansion - contraction - churn) / starting recurring revenue x 100. Only count customers who were already in the base at the start of the period.

What is the difference between GRR and NRR?

GRR shows how much revenue you kept, excluding expansion, and can never exceed 100%. NRR includes upsell and cross-sell expansion and can go above 100%.

Free tool

Churn, GRR and NRR calculator

How much of your base's revenue did you keep, and how much did it grow on its own, without a single new customer? Enter four numbers and find out.

Recurring revenue at the start of the period (MRR or ARR)

Only customers already in the base at the start. Use the same currency and period in every field.

Expansion (upsell and cross-sell)

Contraction (downgrades)

Churn (revenue from cancellations)

Your base

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revenue churn

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GRR (gross retention)

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NRR (net retention)

How the math works

Revenue churn = (contraction + churn) ÷ starting revenue.
GRR = (starting revenue − contraction − churn) ÷ starting revenue. Never above 100%.
NRR = (starting revenue + expansion − contraction − churn) ÷ starting revenue. Goes above 100% when expansion covers the losses.

NRR above 100% means your base grows even without new customers. That's where CS, CX and sales show up in the same number. Read the revenue growth guide.

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