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Tools / SaaS unit economics & metrics calculator

SaaS unit economics & metrics calculator

SaaS and subscription business metrics engine. Calculates Annual Recurring Revenue (ARR), Net Revenue Retention (NRR), customer churn, Customer Acquisition Cost (CAC), Lifetime Value (LTV), and LTV:CAC ratios.

Runs entirely in your browser

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About this tool

Subscription businesses live and die by a handful of metrics, and this calculator computes the core set: Monthly and Annual Recurring Revenue (MRR/ARR), churn rate, Net Revenue Retention (NRR), Customer Acquisition Cost (CAC), customer Lifetime Value (LTV), the LTV:CAC ratio, and CAC payback period.

These figures only mean something in relation to each other, which is why seeing them together matters. LTV:CAC shows whether you earn enough from a customer to justify acquiring them (a ratio around 3:1 is a common benchmark), and CAC payback shows how many months until an acquired customer becomes profitable — both are central to judging whether growth is healthy or burning cash.

It runs in your browser, so your business figures are not uploaded. Use it to track unit economics, sanity-check a growth plan, or benchmark performance against common SaaS targets.

Frequently asked questions

What metrics does it calculate?
MRR and ARR, churn rate, Net Revenue Retention, Customer Acquisition Cost (CAC), Lifetime Value (LTV), the LTV:CAC ratio and CAC payback period.
What is a good LTV:CAC ratio?
A ratio around 3:1 is a common benchmark — earning roughly three times the cost of acquiring a customer. Much lower suggests unprofitable growth; much higher may mean underinvesting in acquisition.
What is CAC payback period?
The number of months of revenue needed to recover the cost of acquiring a customer. A shorter payback means faster, more capital-efficient growth.
Are my business figures private?
Yes. The calculation runs in your browser, so nothing you enter is uploaded.

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