LTV / CAC Calculator
Calculate customer lifetime value (LTV), customer acquisition cost (CAC), LTV:CAC ratio, and CAC payback period. Core SaaS and e-commerce metrics for assessing unit economics.
LTV
$1,166.67
LTV / CAC
5.83×
Payback (mo)
5.7
How to use the ltv / cac calculator
Enter monthly ARPU, gross margin %, monthly churn rate %, and CAC. LTV, LTV/CAC ratio, and CAC payback period are computed.
Formula & explanation
LTV = (ARPU × margin) ÷ churn rate. LTV/CAC ratio: target ≥ 3. Payback (months) = CAC ÷ (ARPU × margin).
Examples
50 ARPU, 70% margin, 3% monthly churn, 200 CAC → LTV ≈ 1,167, ratio 5.83, payback 5.7 months.
Frequently asked questions
- Healthy benchmarks?
- SaaS heuristics: LTV/CAC ≥ 3, payback < 12 months. Aggressive growth allows higher CAC short-term.
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