Estimate LTV (Lifetime Value), LTV:CAC (Lifetime Value to Customer Acquisition Cost), and payback period using monthly ARPU (Average Revenue Per User), gross margin, monthly churn, and CAC (Customer Acquisition Cost).
Model unit economics fast
Plug in a few core inputs and see instant LTV (Lifetime Value) and payback results.
Track efficiency
Validate your LTV:CAC (Lifetime Value to Customer Acquisition Cost) ratio and payback window against targets.
Stress test assumptions
Adjust churn or margin to see how sensitive your model is.
Use monthly ARPU (Average Revenue Per User), gross margin, monthly churn, and CAC (Customer Acquisition Cost) to estimate lifetime value and payback.
Results
Enter your inputs to see a plain-English interpretation of the results.
This calculator helps SaaS (Software as a Service), subscription, and app teams evaluate acquisition efficiency by translating a few core inputs into LTV (Lifetime Value), LTV:CAC (Lifetime Value to Customer Acquisition Cost), and payback period.
Use it to sanity check whether your pricing, monthly churn, and margins support sustainable growth, and to identify which lever - monthly ARPU (Average Revenue Per User), margin, churn, or CAC - drives the biggest improvements.
You can also run quick scenarios before launches, campaigns, or pricing changes to see how shifts in customer behavior or acquisition costs affect unit economics.
ARPU (Average Revenue Per User, monthly)
Average revenue generated per user per month.
CAC (Customer Acquisition Cost)
The average cost to acquire a new paying customer.
LTV (Lifetime Value)
Estimated gross value of a customer over their lifetime.
Churn (monthly)
The percentage of customers who cancel each month.
Gross margin
Revenue minus variable costs, expressed as a percentage.
Payback period
The time it takes to recover CAC from gross profit.
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