From customers acquired this month
Upsells, add-ons, usage growth from existing customers
MRR lost to cancellations
MRR lost from downgrades (not full cancellations)
Enter at least New MRR and Churned MRR on the left to see your Quick Ratio.
Quick Ratio (the SaaS version, not the accounting ratio) measures growth efficiency. It separates real growth from growth that's papered over churn.
Quick Ratio = (New MRR + Expansion MRR) ÷ (Churned MRR + Contraction MRR)
Mamoon Hamid (Kleiner Perkins) proposed the canonical threshold: above 4 is efficient growth — every dollar of churn is offset by four dollars of new or expansion revenue. Between 2 and 4 is workable but worth watching. Below 1 means you're losing more recurring revenue than you're adding, even if MRR is technically growing on a one-month basis.
The number you read for Quick Ratio is more honest than monthly MRR growth, because growth alone can mask a leaky business. A 30% MRR growth month with a Quick Ratio of 1.2 is the warning sign; acquisition is just slightly outpacing churn, and any blip in either direction flips the trend.
Saasly's free metrics calculator tracks Quick Ratio across three months alongside LTV, CAC, payback, NRR, and 15+ other metrics — with benchmark comparisons and trend analysis.
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