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Calculate NDR/NRR from starting MRR, expansion, contraction and churn — see retention and growth health.
Calculate NDR/NRR from starting MRR, expansion, contraction and churn — see retention and growth health.
Enter values above and click Calculate — results will appear here with the formula explained.
Net Dollar Retention (NDR, also NRR) shows revenue retained from existing customers including expansion. It is starting MRR plus expansion minus contraction and churn, divided by starting MRR. At $5,880 start, $400 expansion, $100 contraction and $245 churn, NDR is (5,935/5,880)=100.9%, so you grew without new logos. Above 100% is excellent, below 90% is leaky.
To use the NDR Calculator, enter starting MRR and monthly changes. The tool shows NDR percent, retained MRR and churn vs expansion gap. Model: adding $200 expansion lifts NDR 3.4 points, while $200 churn drops it 3.4 points. Track NDR monthly — it predicts compounding better than logo churn. Use the example to avoid counting new logos, which belongs in gross retention.
Net Dollar Retention Calculator: Calculate NDR/NRR from starting MRR, expansion, contraction and churn — see retention and growth health. Formula: NDR = (start + expansion − contraction − churn) / start × 100. Example: $5,880 start +$400 −$100 −$245 = $5,935 retained, NDR 100.
Net Dollar Retention (NDR, also NRR) shows revenue retained from existing customers including expansion. It is starting MRR plus expansion minus contraction and churn, divided by starting MRR. At $5,880 start, $400 expansion, $100 contraction and $245 churn, NDR is (5,935/5,880)=100.9%, so you grew without new logos. Above 100% is excellent, below 90% is leaky.
To use the NDR Calculator, enter starting MRR and monthly changes. The tool shows NDR percent, retained MRR and churn vs expansion gap. Model: adding $200 expansion lifts NDR 3.4 points, while $200 churn drops it 3.4 points. Track NDR monthly — it predicts compounding better than logo churn. Use the example to avoid counting new logos, which belongs in gross retention.
$5,880 start +$400 −$100 −$245 = $5,935 retained, NDR 100.9%. Without expansion, NDR is 94.1% — leaky.
Formulas are standard public references (see our methodology). External standards are cited in the text where they apply.
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