Net Dollar Retention
Calculate Net Dollar Retention instantly with the exact formula and a worked example.
Net Dollar Retention
MRR at start of period$
Expansion (upsell, cross-sell)$
Contraction (downgrades)$
Lost to churn$
NDR
115%
Same-cohort MRR at end
115000$
Net change
15000$
GRR (without expansion)
95%
Rating
Good — growth without new customers
More about: Net Dollar Retention
What it calculates
The “Net Dollar Retention” calculator computes NDR in % from 4 parameters: mrr at start of period ($), expansion (upsell, cross-sell) ($), contraction (downgrades) ($), lost to churn ($).
Applied in business management, unit economics, and financial modeling.
Example calculation
With parameters MRR at start of period = 100,000 $, Expansion (upsell, cross-sell) = 20,000 $, Contraction (downgrades) = 3,000 $, Lost to churn = 2,000 $ the result is 115 %.
How to use
- Enter mrr at start of period, expansion (upsell, cross-sell), contraction (downgrades) and lost to churn — each field above is adjustable with a slider.
- NDR (%) is calculated automatically as you type.
- Check the worked example below to see the formula applied to real numbers.
- Copy the result or bookmark this calculator.
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FAQ
How is Net Dollar Retention calculated?
The Net Dollar Retention calculator computes NDR (in %) from mrr at start of period, expansion (upsell, cross-sell), contraction (downgrades), lost to churn. Enter your values above and the exact formula is applied instantly; a worked example with real numbers is shown below.
Is the Net Dollar Retention calculator free?
Yes. It is completely free, needs no signup, runs entirely in your browser, and sends no data to any server.
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